dialog listlengths 4 30 | title stringlengths 15 150 | category stringclasses 14 values | dialog_time stringdate 2016-01-21 01:59:30 2018-07-01 01:34:46 |
|---|---|---|---|
[
{
"message": "I want to insert an image in a popup when I click on a layer. I'm successfully using <a href=\"https://github.com/mapbox/leaflet-pip\" rel=\"nofollow noreferrer\">Leaflet-pip but when I want to display an image I've always have <code>undefined</code>. My url is stored in a <code>postgres</code> da... | Leaflet popup - Insert image | gis | 2017-12-14T08:53:26.990 |
[
{
"message": "I want to find villages/cities which are ends. That means: I need this villages which are linked to maximum one village on a distance of X km.I'm just wondering how is this algorithm is called (I guess someone created something similar before).Is there a tool for this? How is this concept called?E... | Finding "terminal" cities on the map | gis | 2017-12-14T10:19:52.817 |
[
{
"message": "I have two shapefile data. One is point data with 800+ observations of certain geomorphologic features in karst and other is a line shapefile which represents faults (geology). I want to know if there is any relationship between those two, or more specifically I would like to know if there are sig... | How to calculate if the location of geomorphological locations are likely to be in the proximity of geological faults | gis | 2017-12-15T08:39:14.240 |
[
{
"message": "I've drawn a cylindrical world map for a fictional planet. Exported it as png and scaled it, so one pixel corresponds to one km at the equator and from north to south pole. I tried several cylindrical crs on it but it does never work out as I want and I can't find out why.<br>My goal: When I us... | What CRS to use for cylindrical raster world map? | gis | 2017-12-15T12:05:35.770 |
[
{
"message": "I have been given a set of folders with a .html file, that was exported from QGIS plug-in \"qgis2web\". Normally you can just click on the .html file and it will open a local version of a QGIS authored website. I don't know the origin of these folders and I don't have access to the original d... | QGIS2WEB outputs data layers as JScript "Script File" ... can I convert them back to .shp? | gis | 2017-12-16T22:16:59.863 |
[
{
"message": "I need to download Landsat images automatically in order to do a forest monitory. I'm using package landsat-utils. However, when I set my sceneID from my interest region the code doesn't work as I have expected.So, here is one example of sceneID (LC82150682015350LGN01) which I would like to acquir... | Why my sceneID doesn't work to download in landsat-utils? | gis | 2017-12-17T23:21:20.233 |
[
{
"message": "Whenever I perform the Summarize Within tool in ArcGIS Pro and use the graduated colors symbology on the resulting feature class, I end up with something that looks like this:<a href=\"https://i.stack.imgur.com/juvZv.png\" rel=\"nofollow noreferrer\">Is there a way to remove all those zeros? In ot... | Arcpy code to remove decimal digits in symbology (ArcGIS Pro) | gis | 2017-12-18T12:52:43.040 |
[
{
"message": "I have some polygons in my oracle database, the column type is sdo.geometry, and I want to draw the polygon using OpenLayers.The problem is OpenLayers reads WKT type and I can't convert to this type, because my version of Oracle is \"Oracle express Edition\", and function like: <code>SDO_UTIL.TO_W... | Draw polygon from sdo.geometry with OpenLayers | gis | 2017-12-18T13:29:27.250 |
[
{
"message": "My project consists of geocoding all Muslim mosques in Portugal (I have this data in CSV file) using QGIS.I'm using OpenLayers to get my base map (Google Streets), but I want to get only the map of Portugal, instead of World Map. Is it possible? I've tried to use OpenStreetMap and GoogleMaps plugg... | OpenLayers in QGIS - Getting country map | gis | 2017-12-18T13:38:13.437 |
[
{
"message": "I have two raster layers, a DEM and a land use layer. The DEM layer is divided into discrete intervals (e.g. 100-200 m). I am trying to figure out how to calculate the percentage of each elevation interval that is allocated to each type of land use. For example, calculating the percentage of the a... | Calculating percent overlap of Raster Layers using QGIS? | gis | 2017-12-18T18:26:13.883 |
[
{
"message": "I'm in need of listing all features in a linestring layer that have dangles (that is, one or both of its boundaries do not touch another feature). This being done in GDAL/OGR.What I'm doing is iterating feature by feature, getting the bounding box of it, using that to do a spatial filter so I only... | Searching for dangles with GDAL | gis | 2017-12-18T21:56:04.983 |
[
{
"message": "I want to create a thematic map of my data. I downloaded a shapefile from Statistics Canada website displaying the various agricultural regions. I have data in ExcelHow do I add this data and match it each polygon?I've been reading the manual and seem to be getting more confused.I am using Mapinfo... | Thematic Map from a STATCAN Shapefile | gis | 2017-12-19T16:36:02.760 |
[
{
"message": "My ajax request for a geojson works fine as a static web app<pre><code> $.getJSON(\"myfile.geojson\", function (data) { theaters.addData(data); map.addLayer(theaterLayer); });</code></pre>I am trying to wrap the project now around flask. All of my js/geojson files are in my static folder.... | Ajax file url inside flask app | gis | 2017-12-19T23:52:54.567 |
[
{
"message": "I am trying to accomplish what should be a simple task: selecting features using an expression in the python console. I am using QGIS 2.18.14 and the Alaska Airports dataset from the QGIS sample data.I want to select the feature with the highest value in the “ELEV” field.My code snippet is:<pre><c... | Selecting features using expression with 'maximum' aggregates function in QGIS python console | gis | 2017-12-21T03:16:32.280 |
[
{
"message": "I can not find ArcGIS domains and subtypes of feature classes in my database table (PostgreSQL 9.5, postgis 2.2). For example I have a domain named <code>material types</code>:1 PVC2 IRON3 HDPEI need to access it from web applications. So I need to send an sql query to databse and get the list... | ArcGIS 10.5 subtype and domains in database | gis | 2017-12-21T12:49:36.280 |
[
{
"message": "I am trying to use this tool which can be found in the ArcToolBox under data management, geometric network<a href=\"https://i.stack.imgur.com/6Qx1o.jpg\" rel=\"nofollow noreferrer\">I need to access this tool using ArcObjects because I have loaded features into their respective feature classes, an... | How to detect geometric network issues (exhaustive check within extent), and repair them using ArcObjects | gis | 2017-12-21T14:08:45.303 |
[
{
"message": "Have a colorful wms-layer and a polygon. Want to create layer-group for a wms-service. Under the polygon wms-layer should be gray-scaled. Did some tests with blending (VendorOption) But all I got was negative effect or some weird color-changing. But no gray-scaling.Alternative to make polygon tran... | GeoServer polygon-grayscale-filter | gis | 2017-12-22T07:46:01.643 |
[
{
"message": "i want to add unique indexes which have to start with \"A\" go up to 99 (A1-A99) once the 99 rows of finished it has start again \"B1\" and to continue up to B99, so this index system has to continue with alphabetic order (A,B,C) with number system (1-99), How to do it in the filed calculator of ... | How to add unique indexes which start with "A" go up to 99 (A1-A99) and then start again "B1" and to continue up to B99 and so on? | gis | 2017-12-24T09:22:18.897 |
[
{
"message": "I've two layers \"cities\" (has the fields: fid, code, and geom) and \"cities_details\" (has the fields: id, city_code, and area).I need to filter \"cities\" layer with a condition applied on the \"cities_details\" layer. I believe that Geoserver's Cross-layer Filtering extension can do that.The f... | Using "IN" CQL function in Geoserver Cross-Layer Filtering | gis | 2017-12-25T11:54:26.793 |
[
{
"message": "Pretty simple question that an internet search (or a few guesses in python) cant answer:How can one programmatically determine which if any version of GRASS is available in pyQGISBest I could come up with was to query processing.alglist(\"grass\") into a variable and regex the result. Pretty much ... | How to determine which version of Grass if any is installed and available in pyQGIS? | gis | 2017-12-26T04:26:41.387 |
[
{
"message": "When I worked with PostGIS I used <a href=\"https://postgis.net/docs/using_postgis_dbmanagement.html#PostGIS_Geography\" rel=\"nofollow noreferrer\">geography type for geo objects with gps coordinates like latitude and longitude on the WGS-84 ellipsoid.Now I have to use SQLite and <a href=\"https:... | spatialite geometry vs PostGIS geography | gis | 2017-12-27T10:49:43.163 |
[
{
"message": "I'm using Arc 10.2.2.I have 2 files:\"Input_Table.exe\" (only 3 columns: \"ID\", \"Lat\", and \"Lon\")\"Target_Shapefile.shp\" (many columns including the same \"ID\", \"Lat\", and \"Lon\")Any rows in the Target_Shapefile with an ID that's present in the Input_Table need to be updated with those ... | Writing ArcPy Update Cursor "Where Clause" that Refers to its own Rows? | gis | 2017-12-28T02:27:47.367 |
[
{
"message": "I'm using Arc 10.2.2.I have 2 files:\"Input_Table.exe\" (only 3 columns: \"ID\", \"Lat\", and \"Lon\")\"Target_Shapefile.shp\" (many columns including the same \"ID\", \"Lat\", and \"Lon\")Any rows in the Target_Shapefile with an ID that's present in the Input_Table need to be updated with those ... | Writing ArcPy Update Cursor "Where Clause" that Refers to its own Rows? | gis | 2017-12-28T02:27:47.367 |
[
{
"message": "I have a number of aerial photos containing both RGB and a near-infrared band. The images are in TIF-format, however I need to convert them to PNG without losing any of the bands. I have tried converting/exporting data in ArcMap, however this fails, unless I choose to \"use renderer\" in the \"Exp... | Converting 4-band TIF to PNG while keeping all 4 bands? | gis | 2017-12-28T10:12:57.877 |
[
{
"message": "I am trying to access to a REST service by an anonymous user on GeoServer 2.9.4. I modified my resp.properties file to allow anonymous role free access to GET:<blockquote> /**;GET=IS_AUTHENTICATED_ANONYMOUSLY /**;POST,DELETE,PUT=ADMIN;</blockquote>Once I did this, the service gives me 404 stat... | REST GeoServer services for anonymous users gives me 404 status | gis | 2017-12-28T22:39:38.977 |
[
{
"message": "I have a file geodatabase with ~20 layers and I would like an XML file for the metadata for each layer that I can send with my data. I tried the \"Export XML Workspace Document\" tool but it only gives me one large file instead of individual files. Is there a way to export individual XML layers ... | How to export metadata from a file geodatabase as XML | gis | 2017-12-29T16:35:31.173 |
[
{
"message": "Well, this seems pretty simple but haven't been answered cleanly in previous relevant questions for example:<a href=\"https://gis.stackexchange.com/questions/75554\">Identify the direction of traveling road segment and<a href=\"https://gis.stackexchange.com/questions/228656\">Finding compass direc... | Estimating direction of travel of road line segment based on long/lat in PostGIS? | gis | 2018-01-02T10:26:51.503 |
[
{
"message": "I need to delete a Datastore (as well as all its content) using GeoServer's REST API.I'm trying:<pre><code>curl -u usr:pwd -XDELETE http://example.com/geoserver/rest/workspaces/ws/datastores/my_datastore.xml</code></pre>But the response I get is:<blockquote> datastore not empty</blockquote>So, I ... | How to delete a Datastore (and its content) with GeoServer REST API? | gis | 2018-01-02T18:04:15.360 |
[
{
"message": "I am trying to take three grayscale PNGs and turn them into an ASCII file for a CNC machine to mill them out. To get an idea of my project, here are some links:<a href=\"https://makezine.com/projects/convert-geological-information-into-custom-map-fit-for-3d-printing-and-milling/\" rel=\"nofollow n... | Using QGIS to turn a PNG into ASCII | gis | 2018-01-02T20:48:20.857 |
[
{
"message": "System: Eclipse IDE in Windows 10 VM Java 8My code segment that the exception is being thrown:<pre><code>private void displayLayers(File rasterFile) throws Exception { Hints hints = new Hints(); reader = new RPFTOCReader(rasterFile, hints); final MapContent map = new MapContent(); map.... | Geotools RPFTOCReader NegativeArraySizeException in reading raster | gis | 2018-01-02T20:51:22.193 |
[
{
"message": "I create such simple demo table:<pre><code>CREATE TABLE IF NOT EXISTS tbl1(id INTERNAL PRIMARY KEY UNIQUE, name TEXT NOT NULL);SELECT AddGeometryColumn('tbl1', 'geom', 4326, 'POINT', 'XY');SELECT CreateSpatialIndex('tbl1', 'geom');</code></pre>after that I create <code>180 * 360 * 60</code> points... | within polygon: why SpatialIndex slow down query | gis | 2018-01-03T11:22:04.910 |
[
{
"message": "I have a shapefile of the US (<a href=\"https://www.census.gov/geo/maps-data/data/cbf/cbf_nation.html\" rel=\"nofollow noreferrer\">5m resolution from the US Census Bureau), but I need the entire globe except for the US. To do this, I opened the shapefile (which I will call <code>usa_layer</code>)... | Layer from difference gets clipped when exporting | gis | 2018-01-03T11:44:56.280 |
[
{
"message": "I'm using ArcMap 10.5.1 I have a map with journeys made by patients across the country as lines features. All journeys are in the same layer. Some of these journeys go right across the country, while some are very localised. When I create maps of small districts I dont want to see the journey line... | Hiding features of a layer at different scales | gis | 2018-01-03T11:45:21.650 |
[
{
"message": "I am trying to convert a feature to a raster in ArcGIS 10.5. When I do that, it only keeps the pixels where the centroid falls within the boundary of the featureclass. However, I would like to keep any pixel that touches the boundary. I have tried changing environment settings but nothing seems to... | Feature to Raster Conversion: Missing Pixels Near Border | gis | 2018-01-03T15:23:41.550 |
[
{
"message": "I have set up a map file on Ubuntu 16.04 with SVG symbols created by Inkscape. Everything is fine. Now I have to port it to a windows server. I installed MS4W, but layers with SVG symbols can't be rendered, the error message is:<pre><code>[Thu Jan 04 10:08:39 2018].979000 msPreloadSVGSymbol(): Ren... | SVG symbols in MapServer Ubuntu vs MS4W | gis | 2018-01-04T10:09:30.600 |
[
{
"message": "My goal is to perform search using filtered WFS attributes. I am using GeoServer 2.5, WFS version 1.0.0, GeoTools version 8.7. I found two solutions that should work according to the description that I found online.First one:<pre><code>final Filter filter = ECQL.toFilter(\"name ILIKE '%SiMpLe%'\")... | Getting WFS features with filter case insensitive? | gis | 2018-01-05T09:44:17.353 |
[
{
"message": "I need a Python program regarding update attributes. I have 20 shapefiles and in each shapefile, attributes to be updated based another field<a href=\"https://i.stack.imgur.com/ynNa2.jpg\" rel=\"nofollow noreferrer\">My requirement is to update the codes in CODE field as per the name (Example list... | How to update attributes from list of values stored in a Excel or CSV table? | gis | 2018-01-06T09:20:41.907 |
[
{
"message": "In my Idea everything works fine but when I try to start my jar which was built by maven there are some errors:1 - Caused by: java.lang.RuntimeException: Exception in Application start method2 - Caused by: java.lang.NoClassDefFoundError: org/geotools/data/FeatureSource3 - Caused by: java.lang.Clas... | Geotools with maven: java.lang.noclassdeffounderror while starting app's jar | gis | 2018-01-06T11:49:15.990 |
[
{
"message": "I'm working with agriculture area data in MapInfo. I downloaded the boundary file from StatCan (call it STC), and a freehand draw tool downloaded here <a href=\"https://tinyurl.com/ydarsnq8\" rel=\"nofollow noreferrer\">https://tinyurl.com/ydarsnq8 (call it DRW)I can draw an area (DRW) over the St... | Calculating the proportion of area drawn over boundary file | gis | 2018-01-08T01:58:50.003 |
[
{
"message": "I'm having an issue where when I try to run my script through user scripts in processing tools, I am unable to properly join two attribute tables from two separate layers when the layer that I want to join has the same name in subsequent runs of the same script. When the script is run the first ti... | Unable to join attribute tables in QGIS using the same layer name continuously when script is run from processing tools with Python | gis | 2018-01-08T08:22:46.840 |
[
{
"message": "I use a little algorithm to transform values from an openstreetmap-file into a table (.dbf).I use the function: GetFieldAsString(\"string\") from ogr.py and everything is fine, but when the \"string\" contains a char like \"_\" or \":\" the error:<pre><code>ERROR1: Invalid field name: 'string_stri... | Invalid field name by using GetFieldAsString from ogr.py | gis | 2018-01-08T09:58:37.090 |
[
{
"message": "I'm trying to use the grass algorithm v.net.connect via the processing menu using a test set of 3 point objects and a single line object. All 4 objects only have geometry and an ID field.With the parameters set to these two layers and the threshold still at 50.00 and the Network set to save to a t... | Using V.net.connect on QGIS 2.18.13 | gis | 2018-01-08T11:21:21.063 |
[
{
"message": "I have tens of shapefiles and want to convert to raster based on CT field(as Fig.1).However,CT fields of some polygons is blank,and these value is set to 0 when I use following gdal_rasterize code. I had assumed that -a_nodata parameter is set nodata is -2,but the output file has no -2.My question... | How to define the blank value of a field from shapefile to raster file based on GDAL_Rasterize？ | gis | 2018-01-08T13:20:34.797 |
[
{
"message": "I have multiple (381) high resolution GeoTIFF's (2x2 meter resolution, 1 band, 700 MB each) that I somehow want to upload to a PostGIS-server to be able to run ST_intersects or ST_3Dintersects queries to. I need the resolution preserved since every 2x2 meter square holds a height value in meters t... | PostGIS intersect query: Raster footprints of multiple high resolution GeoTIFF's or not? | gis | 2018-01-08T15:30:38.077 |
[
{
"message": "I'm writing 3 shapefiles to an MSSQL Spatial database with FME. I'm using a writer with dynamic settings to simplify future updates of the input files.In order to create a spatial index with the dynamic writer I need a primary key column. Right now, I'm accomplishing this with a Counter that write... | How to create autoincrementing primary key with dynamic writer in FME | gis | 2018-01-08T15:46:04.050 |
[
{
"message": "I am writing a Python script to automate publishing Map Services for use in ArcGIS Online. My workflow follows the sample code in Example 1 from <a href=\"http://desktop.arcgis.com/en/arcmap/latest/analyze/arcpy-mapping/createmapsddraft.htm#C_GUID-3BCC01E7-A168-4DC1-A715-7B51B3FE3802\" rel=\"nofol... | Adding Description, Use Constraints, and Credits to Map Service when publishing with ArcPy? | gis | 2018-01-08T22:56:16.977 |
[
{
"message": "I have PostGIS database, which I am using to store raster image as raster datatype. A table has column date, raster, and other property. There are more than 30 tables in the database. The database tables are updated, where the raster for the particular time is replaced with the latest available an... | Dynamic postgis raster data type serving from geoserver | gis | 2018-01-09T03:43:10.450 |
[
{
"message": "I have a large set of data points which are falling away from my study area(Which is not required)Pls see image attached. I need to filter points which are falling within a radius of say 2km from the red line (POINT A AND B). How should I do in one command? As I have lot more files with a similar ... | How to filter points in one go by setting extent area around line? | gis | 2018-01-09T10:29:03.730 |
[
{
"message": "Is there a way to import the TAB file created for georeferencing of an image by Mapinfo into AutoCAD so I don't have to do all the georeferencing again?",
"role": "user"
},
{
"message": "Use <code>MAPIINSERT</code> command in Autodesk Map and browse for raster image.After that, Autodes... | AutoCAD Map import MapInfo TAB file georeferencing info | gis | 2018-01-09T11:37:04.930 |
[
{
"message": "windows 7, PostgreSQL 9.4/ArcSDE/PostGIS backend database that I am transferring to another computer.My backup command is as follows. host 5433<pre><code>pg_dumpall -h localhost -p 5433 -U postgres -c -f \"file.backup\" </code></pre>backups up all nice and everything.when I go to restore it on wi... | Enterprise geodatabase on PostgreSQL backup and restore | gis | 2018-01-09T14:39:02.510 |
[
{
"message": "I have a 2 part question, the first part was easy & is answered but I have one issue :1) Load map in R and convert to Raster : Done2) Tell R to only show a defined color band : NOT doneAs you can see in my example map, it is a map of Namibia, and it is a single layer black and white map, with ... | Defining Color band to recognize from sing layer raster in R | gis | 2018-01-09T15:00:26.197 |
[
{
"message": "I'm running 10.4 right now and I was wondering if there's a way to create a save button add-in that would save the mxd as 10.2? I know there's the arcpy command saveACopy but I imagine that would keep the 10.4 version of the mxd and just create a copy of the mxd in 10.2. I was hoping to just make ... | Creating save button that saves mxd as previous version | gis | 2018-01-09T15:36:54.570 |
[
{
"message": "I am working with an excel/csv file which contain Easting Northing & Elevation value (Its all about point feature). But when i am converting this file in dwg by GIS for use in auto cad then the elevation value is not showing in cad only point feature is showing. How would I resolve the problem... | Converting dwg file by GISpoint | gis | 2018-01-10T07:07:23.237 |
[
{
"message": "How do I display HDF satellite image in real colors as photo image ?LoRes <a href=\"http://img.nsmc.org.cn/IMG_LIB/FY3C/FY3C_MERSI_GBAL_L1_YYYYMMDD_HHmm_0250M_MS.HDF/20140308/FY3C_MERSI_GBAL_L1_20140308_0305_0250M_MS.HDF.jpg\" rel=\"nofollow noreferrer\">http://img.nsmc.org.cn/IMG_LIB/FY3C/FY3C_ME... | How to display HDF satellite image in real colors? | gis | 2018-01-10T10:01:41.227 |
[
{
"message": "I try to make a script which changes the coordinates given in format DMS (like N54 24 04.50, E018 34 17.20 to 18.6889, 54.3320) to DD format which is suitable for working in QGIS. The conversion is pretty easy but what I want to really do is to change a point position basing on coordinates given i... | How to update coordinates by values in columns? | gis | 2018-01-10T17:35:50.337 |
[
{
"message": "How do I fit the Frame (A) of the Map Item exactly to the extent of the Map Canvas (B)?<a href=\"https://i.stack.imgur.com/uC1TX.jpg\" rel=\"nofollow noreferrer\">I have done all of the following: In Project View, I clicked \"Zoom to layer\" (specifically, the widest raster layer).In Print Compose... | QGIS Print Composer - Set Map Frame to Map Extent | gis | 2018-01-10T20:27:10.477 |
[
{
"message": "I have an excel file containing some unprojected geographical coordinate values such as:<pre><code>Time,Lat,Lon,Alt2017:11:21:13:44:07:132,61.8984838,24.2221901,165</code></pre>I wrote a java code to store the data to postgresql database. Now, my postgres database contains a table named 'info' whi... | How to make projected geometry and update it to postgresql? | gis | 2018-01-11T05:34:08.893 |
[
{
"message": "For my research I want to have sentinel-1 layers for each month and in order to reduce the amount of border noise I used the <code>imageCollection.median()</code> on a Sentinel-1 timeseries within the Google Earth Engine.The problem is that when I zoom in the pixels seem to be overlapping and not ... | Reducing Sentinel-1 timeseries in Google Earth engine | gis | 2018-01-11T10:50:50.980 |
[
{
"message": "I have a dynamic style in Geoserver, like below:<pre><code> <sld:ColorMap> <sld:ColorMapEntry color=\"#2c7bb6\" quantity=\"${env('low',0)}\" label=\"${env('low',0)}\"/> <sld:ColorMapEntry color=\"#64a5cd\" quantity=\"${env('low',0) + (env('high',0) - env('low',0)) * 1 /... | Dynamic label in SLD Style | gis | 2018-01-11T11:17:35.190 |
[
{
"message": "Working in R, I have a grid map of the world (as SpatialPolygonsDataFrame object). I have also many indipendent shapefiles (formed by several polygons) expressing species ranges. I grouped all these shapefiles representing distributions in a single list.species <- list(sp1, sp2, sp3, sp4, sp5)W... | From a Grid map to a dataframe of presence/absence of each cell | gis | 2018-01-11T12:43:27.000 |
[
{
"message": "We've built a few projects using Mapzen's vector tiles and rendering them through Tangram. However, now that Mapzen is shutting down, we need to use other tile servers (we would like to maintain the rendering through Tangram, since we've put some work into getting the styles right).<br><br>Is ther... | Render Mapbox tiles with Mapzen's Tangram | gis | 2018-01-11T17:56:21.403 |
[
{
"message": "I'm trying to update all of my field/column names to change them into their non-joined attribute table names, as when you join attribute tables on QGIS the names are altered into something undesirable (see images below)The issue that I'm having is that the field names will not update despite my co... | Column names won't update for the attribute table in QGIS using a python | gis | 2018-01-11T22:49:46.037 |
[
{
"message": "I'm trying to create a model on QGIS 2.18.4 which will allow me to create multiple fixed distance buffers on a selected point(500m, 1km, 2km, 3km,...,50km) with a few clicks, rather than having to do it one by one using the MMQGIS Create Buffer function. Because I'm working on WGS84, my solution b... | Multiple Buffer Model | gis | 2018-01-12T06:54:29.973 |
[
{
"message": "I'm trying to use shapeorientation in QGIS, but it doesn't create a new attribute table in my shapefile. When I open the csv file it's empty. Does anyone know if i need to an installation on PYTHON in QGIS with this plugin?",
"role": "user"
},
{
"message": "I installed and ran this plu... | Using ShapeOrientation plugin QGIS | gis | 2018-01-13T09:41:43.733 |
[
{
"message": "This is only part of a bigger code block that I'm building. The goal of these lines is to import a new layer, and select one feature from the feature class(TOWNSSURVEY_POLYM). The code imports the .shp as a layer feature successfully, however, it throws an error after running (regardless of whethe... | AssertionError in adding lyr file | gis | 2018-01-13T20:06:06.133 |
[
{
"message": "I'm having difficulty in calculating the values for features in an empty attribute column by using existing values from other attribute columns in a joined table. For example, the feature 1 in attribute column 1 + feature 1 in attribute column 2 = new feature 1 value in attribute column 3. Specifi... | Cannot calculate new values for an empty attribute using existing attributes in QGIS with python | gis | 2018-01-13T21:27:08.843 |
[
{
"message": "When I do \"save as gpx\", it creates a gpx file with waypoints only, although I force route and track. Besides other non-gpx schema columns all relavant gpx columns exist based on a attribute table merge of a 'gpx to point shapefile' layer and 'custom point shapefile' layer.",
"role": "user"... | how to convert shapefile in gpx route not gpx waypoints | gis | 2018-01-13T22:03:18.607 |
[
{
"message": "I'm trying to cluster points based on the sum of a attributes of its nearest neighbors.So here are the points in the data set as they are:<a href=\"https://i.stack.imgur.com/gd0hf.png\" rel=\"nofollow noreferrer\">The objective is that each point has an \"evalfield\" attribute associated with it. ... | Point clustering based on a certain value | gis | 2018-01-15T00:19:24.593 |
[
{
"message": "Assuming you have 20+ Qgis projects each with dozens of layers: Background: Web Map Tiles, Features: Millions of Polygons & PointsFeatures are labeled, labels are never overlapping with each otherStyled to look perfect in any zoom LayerGives perfect results if printed out via the composer as a... | QGIS Project to MBTILES / SLIPPY MAPS | gis | 2018-01-15T11:09:04.537 |
[
{
"message": "I created a QGIS project containing several layers which are on my PC. I saved the project to my local drive and then I saved it to the network and copied all the relevent project layers into a folder except the osmap shp files which are on a separate network drive.I then hunted for a way to remap... | Remapping layers in QGIS project to other folders? | gis | 2018-01-15T15:58:59.217 |
[
{
"message": "I am working on showing my ESRI tiled layer to a simple Leaflet web viewer.The tiled layer is hosted from ArcGIS Online.I tested both the ESRI Leaflet plugin and the original Leaflet's <code>tyleLayer</code> with Leaflet API.<pre><code>var my_tiled_layer_1 = L.esri.tiledMapLayer({ url: \"{MY_AR... | Leaflet misinterpreting tiles info from an ESRI hosted Tiled Service | gis | 2018-01-16T00:56:18.493 |
[
{
"message": "How can I change the color (randomly or iterate through a specific array) of a feature that I draw on the map?This is my code:<pre><code>// marker layerMsource = new ol.source.Vector();markLayer = new ol.layer.Vector({ source: Msource, style: new ol.style.Style({ image: new ol.style.Icon({ ... | OpenLayers 4 styling draw features | gis | 2018-01-16T10:04:04.063 |
[
{
"message": "I've got a polygon shape layer, and each polygon has 200 or more vertices. I need to divide every polygon by attributes (vertices). Each polygon can not have more than 80 vertexes. I only found plugins that divide polygon by area.",
"role": "user"
},
{
"message": "I'm not sure i unders... | Split polygons by number of vertices | gis | 2018-01-16T11:04:39.783 |
[
{
"message": "I currently have several Python interpreters installed through ArcGIS, OSGeo and Anaconda. <pre><code>C:/OSGeo4W64/bin/python.exeC:/Python27/ArcGIS10.4/python.exeC:/Users/[UserName]/Anaconda3/python.exe</code></pre>According to my understanding, each of these correspond to different versions of Py... | Managing multiple Python interpreters (ArcGIS, OSGeo, etc.) | gis | 2018-01-16T23:08:21.810 |
[
{
"message": "I'm viewing a 3D shapefile of Cambridge buildings in QGIS 2.18. While I'm able to rotate and move the top-down view, I cannot seem to find an option to move the camera to the side (so the 3D part is actually viewable). Is there any option to do so, or is top-down the only viewport possible?",
... | Rotate/move camera to side view | gis | 2018-01-17T10:22:56.920 |
[
{
"message": "I’m building a web app to help people from a small island off the western coast of France locate their land parcels from the field. I did manage to deal with every map display, transparency.The key function of this web app is to be able to enter in a search box the reference of the parcel and have... | Leaflet - How to search and display features from WFS with search box? | gis | 2018-01-17T19:28:57.583 |
[
{
"message": "I am try to casting idataset to ifeaturelayer i did not get any ideahere my code<pre><code> ESRI.ArcGIS.ArcMapUI.IMxDocument mxd = ArcMap.Application.Document as ESRI.ArcGIS.ArcMapUI.IMxDocument; ESRI.ArcGIS.Carto.IMap map = m... | Casting idataset to ifeaturelayer in ArcObjects C#? | gis | 2018-01-18T07:41:23.047 |
[
{
"message": "I have a raster that what to conduct the following condition: <pre><code>if pixel value <25 then pixelvalue*1.6 and if pixel value>=25 then (pixelvalue*0.9)+16.67</code></pre>and I wrote this code but I get an error<pre><code>import rasterio as rioimport matplotlib.pyplot as pltimport numpy ... | Shape mismatch when trying to reclassify | gis | 2018-01-18T08:20:01.220 |
[
{
"message": "I want to create a Square Buffer of 10 km around a .vrt (Raster) file in QGIS using Python programming in QGIS Python Console. Please help me to write this python program for creating buffer around a .vrt file in QGIS. What I have tried is that I first convert the input .vrt file (raster) into a .... | Create a Square Buffer around a Raster ( .vrt ) file in QGIS Python Console | gis | 2018-01-18T13:30:54.803 |
[
{
"message": "I want to use the package tmap to plot a simple shape with a basemap (e.g. OpenStreetMap). According to the help page of tmap this should be able by using <code>tm_layout(basemaps = c('OpenStreetMaps'))</code>For the dataset of the provinces of the Netherlands this should work<code># load package ... | R tmap package: basemap not working | gis | 2018-01-18T13:40:28.080 |
[
{
"message": "I am working with a large (30GB) 3 band geotiff. I am using the following code to attempt to import the bands into python<pre><code>import gdalimport numpy as npraster_path = \"C:/Path/To/Image.tif\"raster_dataset = gdal.OpenEx(raster_path, gdal.GA_ReadOnly)geo_transform = raster_dataset.GetGeoTra... | Processing large geotiff using python | gis | 2018-01-18T14:34:16.073 |
[
{
"message": "I'm a new learner of Google Earth Engine. What I am doing right now is to extract water bodies from Landsat 8 using such water index as NDWI(normalized difference water index) in GEE. Is there any available function in the binarization of the water bodies to obtain the optimal threshold (such as t... | Binarization of water body extraction in Google Earth Engine? | gis | 2018-01-18T17:58:03.227 |
[
{
"message": "I am still new to ArcPy. I'm running a really simple script, it selects a feature from a dataset (one town out of many), saves the data, and adds it to the (empty) dataframe.<pre><code> map = mapping.MapDocument(\"CURRENT\") df = map.activeDataFrame where_clause = \"TOWN = \" + \"'\"+G... | Adding geoprocessing results as layer to dataframe using ArcPy? | gis | 2018-01-19T04:45:15.980 |
[
{
"message": "I have created 3 <code>print layouts</code> in QGIS3. Now I am trying to get a <code>list</code> of all <code>layouts</code> in the <code>LayoutManager</code> with <code>python</code>. This is how I am trying to do it(this code is executed in the python console of QGIS3):<br> <pre><code>>>&g... | How to get a list of all Layouts in QGIS3? | gis | 2018-01-19T16:06:13.753 |
[
{
"message": "<pre><code>arcpy.TableSelect_analysis(in_table, out_table, {where_clause})</code></pre>\"Selects table records matching a Structured Query Language (SQL) expression and writes them to an output table.\"Using the <code>arcpy.TableSelect_analysis()</code> function I have this simple script:<pre><co... | (arcpy) Multiple TableSelect_analysis? | gis | 2018-01-19T19:55:25.633 |
[
{
"message": "I tried pip install rasterio but it failed building a wheel. So i downloaded the wheel file and tried installing it again as suggested in this post:<a href=\"https://github.com/mapbox/rasterio/issues/603\" rel=\"nofollow noreferrer\">https://github.com/mapbox/rasterio/issues/603It worked and raste... | import rasterio gives DLL load failed: The specified module could not be found error | gis | 2018-01-21T09:06:30.200 |
[
{
"message": "I am working a lot of aerial photos that are very old and were scanned by a contractor. The flight were taken and snapshot over the national forest. The aerial photos are not georeference.I am going to use them in ERDAS Imagine 2016 AutoSync to perform them with control points and run APM.The only... | What Geometric model can I use for the old black and white aerial imagery? | gis | 2018-01-21T16:54:11.553 |
[
{
"message": "I select a column chart for symbology in ArcMap. How do I put the values of the parameter under the columns? Here is an example of what I want to make:<a href=\"https://i.stack.imgur.com/w8Ttz.jpg\" rel=\"nofollow noreferrer\">",
"role": "user"
},
{
"message": "I am not sure how to do ... | Adding values below column chart for symbology in ArcMap? | gis | 2018-01-22T08:55:30.070 |
[
{
"message": "I've written a script that converts all shapefiles contained in a folder into lyr and then kmz. <pre><code>import arcpyarcpy.env.workspace = \"path\"arcpy.env.overwriteOutput = Trueallfeatures = arcpy.ListFeatureClasses()print allfeaturesfor feature in allfeatures: desc = arcpy.Describe(feature... | Convert Shp to KMZ displaying labels using arcpy? | gis | 2018-01-22T10:19:29.330 |
[
{
"message": "Using ArcMap's near tool, I have 'projected' the vertices of a trail onto a corresponding line (river), in order to find the closest point on the river to each trail vertex. However, as you can see in the screenshot, not all the trail points (from the green line) have found corresponding near poi... | ArcMap Near Tool doesn't find nearest feature for some input points on the line | gis | 2018-01-22T11:47:26.170 |
[
{
"message": "I have a public-accessible tiled service hosted on the ESRI ArcGIS Online platform in EPSG 3857 (Web Sphere Mercator). The service URL is <a href=\"https://tiles.arcgis.com/tiles/RylLPiI61AyfENce/arcgis/rest/services/VISCAmap3857/MapServer\" rel=\"nofollow noreferrer\">https://tiles.arcgis.com/til... | Leaflet fails to overlay my ESRI hosted Tiled Service on the OpenStreetMap basemap | gis | 2018-01-22T22:42:42.173 |
[
{
"message": "What I'm trying to do:Extract median (or 50th quantile) by a single polygon from 558 GeoTIFF rasters stored in a folderWhat I got so far:<br>Using <code>Python</code> from within Qgis and <code>Qgs.ZonalStatistics</code> I've managed to extract statistics by polygon from *.tiff files in a director... | Python: Extract median by polygon from multiple raster files | gis | 2018-01-23T08:49:00.720 |
[
{
"message": "I wrote a simple script supposed to convert all layers in a mxd into kmz and it doesn't work.Kmz are being created but they're not what they should be.<pre><code>import arcpyarcpy.env.workspace = pathworkspacemxd = arcpy.mapping.MapDocument(pathmxd)allLayers = arcpy.mapping.ListLayers(mxd)for laye... | Convert all .lyr in an .mxd into kmz using arcpy | gis | 2018-01-23T09:12:46.210 |
[
{
"message": "I am trying to use Qgis to produce the input file for SWMM and the first step is to produce the geometry tables. I need to export the geometry of elements as a tables with these format:(poygons)<pre><code>;;Subcatchment X-Coord Y-Coord ;;-------------- ------------------ ---... | How to export geometry as a table in QGIS | gis | 2018-01-23T09:56:32.937 |
[
{
"message": "Because of thread locking issue connected with code which locks threads when working with cached feature types I would like to disable this feature. Root issue <a href=\"https://gis.stackexchange.com/questions/268900/geoserver-2-9-2-database-connection-pooling-thread-locking-issue\">GeoServer 2.9... | Is there a way to disable usage of cached feature types in GeoServer? | gis | 2018-01-23T11:45:02.933 |
[
{
"message": "I am using R to do spatial analysis. I have a river shapefile spanning most of the northern Northern Hemisphere (north of about 50 deg). I am hoping to buffer each river segment by its width in meters. However, the data is currently in WGS84 (aka ESPG 4326), which is lat/lon. The buffer function u... | What projection (in meters) should I use for most of the Northern Hemisphere above 50 degrees? | gis | 2018-01-23T16:58:37.967 |
[
{
"message": "I am having trouble cloud-screening Landsat 8 imagery in Google Earth Engine for a country with high cloud cover throughout the year. I have tried various techniques but unfortunately there is a substantial amount of cloud in all imagery and the techniques given in the Earth Engine Help are not qu... | Google Earth Engine: Finding least cloudy pixel of Landsat 8 images in ROI | gis | 2018-01-23T18:31:15.760 |
[
{
"message": "I am producing DEMs and various maps for own book project; just learned to use GIS software for this project. I am using QGIS (2.14.21) and SRTM data (CRS:WGS84 EPSG:4326). I want square maps that extend a specific distance in four main directions (E,W,N,S) from the center (38.504421, 43.331467 o... | Distance in SRTM image vs. Google Earth/etc | gis | 2018-01-23T19:54:28.277 |
[
{
"message": "I'm in the process of creating an accessibility map that identifies where a pedestrian sidewalk network overlaps with different features along the network (e.g. whether the network overlaps with stairs, ramps, crosswalks etc.). I've flagged segments of the pedestrian network with a \"1\" if they ... | Adding Cost to Shortest Path Finder in FME | gis | 2018-01-23T22:59:18.043 |
[
{
"message": "I want to print the minimum and maximum pixel values of a raster. When I load the raster Pioneertown.row1.asc in Layers Panel in QGIS, it is showing minimum value = 'nan' and maximum value = '1' . <pre><code>ds = gdal.Open(\"E:/Sreeraj/Task Global Data CONVERSION/Split/output/Pioneertown_Agricultu... | Wrong Minimum Pixel value using GetStatistics function | gis | 2018-01-24T07:18:29.837 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.