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 am attempting to make a generic tool to move existing points to an already defined XY. What I want to do is have the user define the feature class, then the X field and Y field from that feature class, then run the Calculate Field with those X and Y fields. Below is what I have, but I know I a... | Using field parameters in calculate field | gis | 2017-11-22T18:31:38.393 |
[
{
"message": "Using the Net Topology Suite, what is the easiest way to determine if one polygon is entirely contained in another?Given two independent polygons, A and B, they may overlap, or they may not. If they do, polygon A may be entirely contained in polygon B or polygon B may be entirely contained in poly... | How to determine if one polygon is contained in another? | gis | 2017-11-22T20:22:49.877 |
[
{
"message": "I am trying to use the \"leaflet-measure-path\" plugin for leaflet to print the segment length of some geojson linestrings.I am using the \"Leaflet Ajax\" plugin to load the GeoJSON files into my map and am then applying different markers and different line styles depending on the properties of th... | How to use leaflet-measure-path with GeoJSON Linestring? | gis | 2017-11-22T20:26:15.117 |
[
{
"message": "There are several similar questions around, like <a href=\"https://gis.stackexchange.com/questions/41977/sort-layers-in-qgis-table-of-contents\">Sort layers in QGIS table of contents or <a href=\"https://www.queryxchange.com/q/23_181281/sort-layers-in-group-qgis-python/\" rel=\"nofollow noreferrer... | Set layer order in QGIS with PyQGIS | gis | 2017-11-23T07:52:01.780 |
[
{
"message": "I have a problem with hillshade function: I've set 315 azimuth, 45 vertical angle and 1 Z factor, but the result is very bad... The original dem file is a .geotiff from Global Data Explorer (Aster Global DEM V2). I would like to obtain a pretty hillshade, but I don't know what is wrong.Here the or... | Hillshade results look too grainy | gis | 2017-11-23T10:24:26.320 |
[
{
"message": "I am trying to find the most number of 'bands' (band A, B, C) in each postcode area. The 'bands' is represented in points and I would like to output into maps(polygons). Is there a way to do a spatial join (i.e. join attributes by location) and get it to calculate the mode (most times that reoccur... | Is there a 'mode' function in spatial join QGIS | gis | 2017-11-23T14:24:02.243 |
[
{
"message": "My name.geojson file is in EPSG:3857 and I try to open it on OpenLayers but it didn't show. Which code should I use to open name.geojson file?<pre><code><!doctype html> <html> <head> <link rel=\"stylesheet\" href=\"https://openlayers.org/en/v4.5.0/... | How to open GeoJSON file from OpenLayers 4.5? | gis | 2017-11-23T18:34:34.960 |
[
{
"message": "I have a shapefile of a country with 50 fields. Each field contains values (-3 to 3) for a particular month. I would like to create a for loop that iterates through the fields, updates the map, uses a common symbology and exports to a PNG file. The symbology I would like to use is one color per nu... | Applying consistent symbology across all fields of layer using ArcPy? | gis | 2017-11-24T03:16:44.217 |
[
{
"message": "In the version 2.18.6 if I make a layout with many thematic maps coming from the same shape, how can I avoid the refresh of the maps?I am doing a layout with the same shapefile split in four maps with different thematic design but when I export it all maps are refreshed with only design.",
"ro... | QGIS 2.18.6 How to avoid the refresh of map when you export as image | gis | 2017-11-24T06:28:10.367 |
[
{
"message": "I know that <code>arcpy.Statistics_analysis</code> is able to calculate the sum of Float fields. Now I have a gdb named <code>yyy.gdb</code> that contains a feature class named <code>abc</code> like this:<a href=\"https://i.stack.imgur.com/LAMow.jpg\" rel=\"nofollow noreferrer\">where: <code>abc<... | Using arcpy.Statistics_analysis | gis | 2017-11-24T17:54:42.990 |
[
{
"message": "I'm building a municipal model with many pipes, manholes & other structures as vector layers - these are coming from several different sources of information and the field structure can be slightly different depending on the source. I then need to add many new fields to each table for field d... | join or merge empty table with layer | gis | 2017-11-24T19:14:35.957 |
[
{
"message": "I am confused regarding the OpenLayers installation. In the <a href=\"https://openlayers.org/download/\" rel=\"nofollow noreferrer\">official page it says it is highly recommended to download using <code>npm install ol</code> while in this <a href=\"https://github.com/openlayers/openlayers/release... | Openlayers installation | gis | 2017-11-25T20:27:42.210 |
[
{
"message": "In my Geoserver project, I need to put each feature in a separate layer, and combine all these layers in one layer group.The problem is when the number of features increases ( > 1,000 feature) the performance of displaying and querying the layer group degrades significantly compared to putting all... | Layer group with large number of layers vs large vector layer in GeoServer? | gis | 2017-11-26T11:44:41.280 |
[
{
"message": "I want to calculate total PV potential of a roofs in a certain area. To do that I made a dsm, ran SAGA \"Potential Incoming Solar Radiation\" algorithm (just playing with it only for now - I need to work out how to obtain proper values) and cut the output raster to vector with a roofs outlines.As ... | How to calculate total PV potential of a roof using QGIS? | gis | 2017-11-26T19:28:47.753 |
[
{
"message": "I am using ArcMap Desktop 10.4. I have a CSV file containing the address of properties in 2 fields - civic number and street name. I was trying to create an address locator using the file as the reference data. I selected single house subaddress and made sure all the fields match. But when I click... | Failed to create address locator from a CSV file | gis | 2017-11-26T20:48:31.727 |
[
{
"message": "Im trying to get the layer coordinates with a mouse click in ArcMAP. I did this in QGIS and im not finding anything on how to get this working in ArcMAP. Here is the QGIS version:<pre><code>def selectPoint(self): self.pointEmitter = QgsMapToolEmitPoint(self.iface.mapCanvas()) QObject... | Get layer coordinates with mouse click ArcMAP 10.2 | gis | 2017-11-26T23:28:59.313 |
[
{
"message": "I'm trying to append the attributes of the lines (0 or 1) to all the polygons that they intersect (take the mean if multiple lines exist), as shown below. The polygons, lines and the DataFrame are all in the same Geographic coordinate system.<a href=\"https://i.stack.imgur.com/1Qvt4.png\" rel=\"no... | Getting all Null when spatial joining lines with polygons (ArcGIS Desktop 10.5.1) | gis | 2017-11-27T11:29:45.843 |
[
{
"message": "I have shapefile (from the local government gis office of a town in Massachusetts) that contains, in the corresponding <code>.shp.xml</code> file, the following WKT projection:<pre><code>PROJCS[\"NAD_1983_StatePlane_Massachusetts_Mainland_FIPS_2001\", GEOGCS[\"GCS_North_American_1983\", ... | Help converting a WKT projection to proj4 | gis | 2017-11-27T16:27:30.787 |
[
{
"message": "I have a raster stack of several layers such as NDVI, Slope, texture, and TCT bands, and would like to create a multi-dimensional spectral signature plot from my ground thruth points representing different vegetation classes.How can I create a multi-dimensional spectral plot using R based on my ra... | How can I create a multi-dimensional spectral plot using R? | gis | 2017-11-27T18:17:55.017 |
[
{
"message": "I work with LS8-data in a mountainous area where the illumination is poor especially in the winter months. My thought is to use either a shadow mask or apply topographic correction.I will use all the available data for my research area over five years - aka apply a multi-temporal approach year-wis... | Topographic correction in ENVI | gis | 2017-11-27T21:21:54.293 |
[
{
"message": "I am looking to create my own OS Carto Basemap which is currently a ArcGIS third party product. It gives you the ability to to work at different zoom levels within your project.Is there a way I can mimic this for use in QGIS so that at different zoom levels the basemap refreshes? I understand that... | Creating own OS Carto Basemap equivalent for use in QGIS | gis | 2017-11-28T10:23:44.907 |
[
{
"message": "If you select multiple polygons, and then try to merge them, ArcGIS creates the dialog box showing the selected polygons (picture below). You can then double click the one you want the others to merge into. How does ArcGIS decide which polygon comes out top of the list? I can't work out what crite... | Selecting multiple polygons - which polygon is top of the merge list? | gis | 2017-11-28T13:38:27.003 |
[
{
"message": "I have a dataset containing 171 shapefiles, their names as \"shp0_0\" to \"shp0_171\". I need to merge them into a single shapefile. When I use the merge tool and load all the .shp from the folder, it gives me random order, they are not listed by the filename order.I need the output attribute tabl... | How to merge shapefiles following a particular order? | gis | 2017-11-28T13:50:35.503 |
[
{
"message": "I have a leaflet map and a <code>kml</code> file. I load the kml file using the plugin: <a href=\"https://github.com/mapbox/leaflet-omnivore\" rel=\"nofollow noreferrer\">leaflet-omnivore. Now I want to access the <code><folder> <name></code>(which is \"RegionName\"). I need it because... | Leaflet: Access KML folder name | gis | 2017-11-28T14:47:13.710 |
[
{
"message": "ContextWe're now in the process of transferring our systems to Qgis. what needs to be doneI need to export a DXF based map from Qgis into vector pdfs, in order to import into the program we use for illustrations. For additional info : Qgis is not able to do what I need it to do for an illustration... | Qgis is not exporting vector PDF at larger scales | gis | 2017-11-28T15:16:54.783 |
[
{
"message": "I am currently working with QGIS 2.18 and I have two layers: one layer is filled with lines which represent streets. The second layer describes the location of sensors which are represented as points like in the image below: <a href=\"https://i.stack.imgur.com/Lt1pr.png\" rel=\"nofollow noreferrer... | Finding line with minimum distance to point and update attribute of points? | gis | 2017-11-28T15:23:59.733 |
[
{
"message": "I have the following input file<pre><code>gdalinfo SAVI_v2_T_0006_0006_savi.tifDriver: GTiff/GeoTIFFFiles: SAVI_v2_T_0006_0006_savi.tifSize is 4308, 208Coordinate System is:PROJCS[\"WGS 84 / UTM zone 32N\", GEOGCS[\"WGS 84\", DATUM[\"WGS_1984\", SPHEROID[\"WGS 84\",6378137,298... | Error: Attempt to create 2x0 dataset is illegal,sizes must be larger than zero | gis | 2017-11-28T15:40:26.683 |
[
{
"message": "AS a build off from this question I posted over a year ago <a href=\"https://gis.stackexchange.com/questions/217928/buffer-miles-in-decimal-degrees-with-fiona-and-shapely\">Buffer miles in decimal degrees with fiona and shapelyI am attempting to create 50-mile buffers around each earthquake. I hav... | Custom transverse Mercator projection with fiona and shapely | gis | 2017-11-28T19:35:01.763 |
[
{
"message": "We have several 'time-aware' datasets, but the dates are stored as YEAR (2017), SCHOOLYEAR (20172018), etc. rather than a true DATETIME value.In order to animate these datasets, is it possible to create a dummy DATETIME value using a virtual field in QGIS?I've tried so far to create a virtual fiel... | How to create a 'dummy' DATETIME field for QGIS timemanager? | gis | 2017-11-28T21:54:56.887 |
[
{
"message": "I have a MODIS MOD11A2 (LST) grid, which has a spatial resolution of 1000m. For the purpose of Surface Energy Balance modelling, I'm trying to improve the resolution of this data to 250m, using a covariate like the NDVI. Lots of literature is available on this topic, with various titles and subjec... | Spatial downscaling of MODIS LST grids using a covariate (e.g. NDVI): available software? | gis | 2017-11-29T11:49:57.080 |
[
{
"message": "I need a few thousands of street distances between cities in germany. I know that there are a few web APIs where I get the distance thru a REST request, but I wonder if I can do that locally on my Linux PC. I saw the OSRM project and libosrm seems to do what I want.Are there any other tools doing ... | getting street distances locally | gis | 2017-11-29T12:56:38.777 |
[
{
"message": "We have a Java Application deployed on Tomcat. There is a PostgreSQL database with PostGIS extension enabled. We have both geometries and geo-points in the database.We have a backend thread that generates PDF reports asynchronously (when requested). We now want to add maps to the PDFs (based on... | Map Tile server for backend Java PDF renderer | gis | 2017-11-29T17:26:47.767 |
[
{
"message": "I am trying to select address points from address feature class within a selected zip code from zipcode feature class and populate the address feature class field \"ZipCode\" with the \"Zip_Code\" field from the zipcode feature class that is selected. What I have so far doesn't produce an error, ... | Performing row update within Select By Location based on field within selected feature class using ArcPy? | gis | 2017-11-29T17:59:07.423 |
[
{
"message": "I am trying to use model builder to create a number of DEMs from LiDAR point clouds. To do so, I need to filter the point clouds for ground points only and then convert the points to raster. In the past, I have used the tool \"LAS Dataset to Raster\" but I am unable to set the filters through this... | Using iterator for lasd files in ArcGIS ModelBuilder? | gis | 2017-11-30T01:07:55.340 |
[
{
"message": "Suppose there are two polygons that are closer than 10m to each other. I would like to either combine those two polygons or create a new polygon that fills the empty area between them.",
"role": "user"
},
{
"message": "Create a <a href=\"http://desktop.arcgis.com/en/arcmap/10.3/manage-... | Automatically fill empty area between polygons if within certain distance using ArcMap? | gis | 2017-11-30T12:02:31.813 |
[
{
"message": "I am staring at 5600 individual points and 60 polygons. I need to create a new field in the point fc called 'Basin Name' and populate the field with the name of the Basin that it lies in. I am trying to develop a reusable script that can be used weekly to accomplish newly inputed points. I have tw... | Create and populate field with name of feature (Select by Location) ArcPy | gis | 2017-11-30T15:29:49.130 |
[
{
"message": "I am attempting to adjust the visibility of a polygon layer in Carto by zoom level. To keep it simple for now I am looking to have the opacity of 1 from zoom 0-7 and opacity 0 from zoom 8+. I am working directly in Carto (not tilemill, or elsewhere) and have tried a few methods. Most notably, <... | Adjusting Polygon Visibility with CartoCSS | gis | 2017-11-30T22:43:24.533 |
[
{
"message": "Is there a way (e.g. package) to perform an unsupervised classification using the ISODATA clustering algorithm in R?",
"role": "user"
},
{
"message": "I believe that closest you are going to come is the unsuperClass function in the RStoolbox package (<a href=\"http://bleutner.github.io... | Unsupervised classification using ISODATA clustering in R | gis | 2017-12-01T00:19:07.690 |
[
{
"message": "Is there a gdal or python based tool for converting Polygons and MultiPolygons inside of GeoJSON to LineStrings and MultiLineStrings? I'm using rasterio / rio rasterize or gdal_rasterize to rasterize GeoTIFF w/ GeoJSON.I need to read in GeoJSON files and be able to convert any (Multi)Polygons into... | GeoJSON convert Polygons and MultiPolygons to LineStrings and MultiLineStrings | gis | 2017-12-01T00:47:54.353 |
[
{
"message": "VERSION QGIS 2.1xi realize plugins to do this actions without use toolbar: copy features / paste to layer / merge selected features => define attribute to use in merge.So, all is okay but i don't find \"merge selected features\" in PyQt action or others like : qgis.utils.iface. ???What is good exp... | PyQt - merge selected features function | gis | 2017-12-01T15:06:24.470 |
[
{
"message": "I have 2 scripts within QGIS processing toolbox and I can't seem to work out how to access the parameters of 1 script from the other. Since QGIS sets up the processing parameters (by 'looking for' the ## notation) before the rest of the script is run, the parameters are already set up by the time ... | Importing QGIS script parameters from another script | gis | 2017-12-01T16:14:32.160 |
[
{
"message": "I would like to create a vector grid over a raster layer, but with the grid being specifically only over the layer itself.Right now, by using the vector grid option I'm getting a grid over a lot of unused space which is consuming considerable processing power and slowing down the work. Is it possi... | Create a vector grid over a raster layer | gis | 2017-12-02T07:44:29.283 |
[
{
"message": "I developed a plugin for qgis in python language with a code line to execute split image algorithm from orfeo toolbox. When I update from QGIS 2.18.9 to 2.18.14 the split image algorithm doesn't show up in the processing toolbox and when I run the plugin I created, QGIS crashes because it can not ... | Algorithm split image doesn't show up anymore in QGIS 2.18.14 | gis | 2017-12-02T17:37:15.963 |
[
{
"message": "In QGIS I have a big island (Britain). There are lots of rivers inland, but not many at the coasts. The rivers were originally vector layers. I converted them to Raster (by burning them with the value of 1). The image attached shows the options I put in. This gives a black square over some of the ... | When computing distances between 2 vector layers - getting window of analysis right size | gis | 2017-12-02T21:37:44.117 |
[
{
"message": "I am a bit confused on the releases naming of QGIS.On the website you read everywhere QGIS 2.18 = new LTR (that I suppose stands for \"Long Term Release\"), QGIS 2.14 = previous LTR.Neverthless the *-ltr linux repositories point to QGIS 2.14, and so do all the ubuntugis repositories.So, is it safe... | Choosing QGIS LTR to install on Ubuntu? | gis | 2017-12-03T11:09:12.470 |
[
{
"message": "System: Win 7, OSgeo4W package 64 bit (current to 3/12/17), GDAL 2.2.3I have been provided with a polygon layer in ESRI FileGDB format (created in ArcMap v10.3 at least, maybe 10.4 or 10.4.1). The polygons in the layer have been digitised using a mix of straight line segments and bezier curves / t... | gdal and openFileGDB driver - polygons with bezier curves not exporting correctly | gis | 2017-12-04T07:07:05.647 |
[
{
"message": "I'm trying to use GDAL calc to convert values in a .tif file, I've done this before with GDAL calc but for converting to a single value. Now I'm trying to convert multiple values in this fashion:0.0 - 0.2 -> 10.2 - 0.4 -> 20.4 - 0.6 -> 3 etcI've tried this: <pre><code> calculation='((0.0<A&l... | gdal calc to convert multiple values | gis | 2017-12-04T11:43:03.170 |
[
{
"message": "Any advice on which map projection to use for a map of Russia? I am trying to project my shapefile (WGS84) but not sure which one to select. I would like to maintain equal areas.",
"role": "user"
},
{
"message": "There is the Albers Equal Area Conic for Russia. It seems to be the proj... | Projection for Russia map | gis | 2017-12-04T15:36:04.417 |
[
{
"message": "I'm working with QGIS (or rather discovering QGIS, should I say) and I have a data structure that looks like this:<pre><code>PLACE_NAME ST_ASTEXT(geom) x MULTIPOLYGON1(...) x MULTIPOLYGON2(...) y MULTIPOLYGON3(...) y MULTIPOLYGON4(...) y ... | Take centroid of multipolygons and use it as center of a circle | gis | 2017-12-04T16:33:15.543 |
[
{
"message": "I am not a formally trained GIS professional nor is GIS a primary tool in my job. And therefore, without an incentive to optimize GIS workflows, I may not understand why one tool, although seeming to accomplish the same goal as another, may be better for a given task . Sometimes answers or commen... | Why is ArcGIS Tabulate Area Better to Calculate Unique Landuse Values in Zone? | gis | 2017-12-04T16:52:04.610 |
[
{
"message": "i want to split a text column with city names by selecting only the names like 'world (planet)' and not like 'world planet'. Tried before with left( \"Name\", strpos( \"Name\" ,' ')) update existing field and results are fine only for the names 'world (planet)' but the other names like 'world plan... | Splitting text attribute using conditional function QGIS 2.18.13 | gis | 2017-12-04T18:25:50.730 |
[
{
"message": "some of my data gets re-align every time i re-add it in within the QGIS Table of contents ( like a good 5-10 feet off). I have no idea what could be the cause, I may have the given layer in a different projection compared to the basemap but i don't think that is the case. suggestions?",
"role... | Data gets skewed when re-adding it into the table of contents | gis | 2017-12-04T20:15:16.867 |
[
{
"message": "I am looking to create a user-input script for finding surrounding features of a given point. However, the parameters for it are very sensitive and I would like for it not to have to be such a process to create results.This is the script that I have so far:<pre class=\"lang-py prettyprint-override... | Using less parameters for Python script tool? | gis | 2017-12-04T20:29:03.057 |
[
{
"message": "I have 2 geojson feature collections in leaflet. One of them is road and the other one is parcels. I want to calculate buffer for road and then intersect this buffer layer with parcels. How can I do this using turf.js and leaflet. I am a newby in both of them. I tried to write a little script but ... | Buffer and intersect using turf.js and leaflet | gis | 2017-12-04T23:04:27.380 |
[
{
"message": "The .png's are stored here: <code>C:\\Program Files (x86)\\GeoServer 2.12.1\\data_dir\\styles</code>.I have seen many different ways to incorporate a .png into Geoserver and none have worked for me. I have no idea how to proceed.These are a few formats that I have tried:<code>xlink:href=\"http://l... | SLD file with .png's to style points on a Geoserver OpenLayers map | gis | 2017-12-05T01:28:52.850 |
[
{
"message": "I can't understand why that one was closed as off-topic by Kersten, BERA, whyzar, aldo_tapia, ArMoraer Dec 5 '17 at 15:56 due to \"Questions relating to general IT or with no clear GIS component, ...\" geopandas is pythons GIS component and there are 753 other search results with geopandas. tim C'... | Tim C's cloesed question - Spatialindex is missing for Geopandas. reopend by rk: geopandas is GIS for python | gis | 2017-12-05T09:09:41.343 |
[
{
"message": "In QGIS there is an option to create a <code>custom form</code> that should make it easier to create/update attribute entries. So my question here is how is the relation between the two? If I change something in the <code>attribute table</code>, does the value in the <code>custom form</code> also ... | custom form and attribute table QGIS | gis | 2017-12-05T12:37:19.377 |
[
{
"message": "I have a polygon feature and i want to convert it to a raster but i dont want the polygon as a whole , i just want each column to produce a different raster.The first problem starts that the values are float.I have tried to write a python to do this but I am still getting errors, below is my table... | Convert a column of a polygon with float values to a raster by using arcpy.da.SearchCursor | gis | 2017-12-05T15:33:49.037 |
[
{
"message": "<a href=\"https://i.stack.imgur.com/2P2Sk.jpg\" rel=\"nofollow noreferrer\">I am attempting to execute a Select query in Select By Attributes where the return record set I'm looking for includes all records where the String value is greater than 7 characters long.For ex., I have records in my tabl... | SQL Condition Statement in Select By Attributes query | gis | 2017-12-05T16:22:35.607 |
[
{
"message": "I am writing a small program that runs through a ton of different shape files, tab files and geodatabases and gets their extent (about 10000- 100000 files). I am opening these using the GDAL python library. I am using Python 2.7 and GDAL 2.2.3 on a windows 7 platform.Unfortunately, some of these l... | Catching a system exit with GDAL Python | gis | 2017-12-05T22:05:33.217 |
[
{
"message": "I have set a series of domains for my Feature Class in ArcMap. The domains work well but it's just when the FC is under edit, it does not display the existing value sitting in the database.Instead it displays a blank or something similar to \"keep existing value\".Is there a way for the domain to ... | Domain cannot display existing values when editing through the domain | gis | 2017-12-06T02:46:46.177 |
[
{
"message": "In QGIS 2.18.14 Processing Toolbox I started to use <code>v.buffer.distance</code> to create fixed-distance buffers around my lines.I can also make the buffer with square caps (straight ends).However, I cannot make it without end cap. I mean, the option \"Do not make caps at the ends of polylines\... | v.buffer.distance without cap | gis | 2017-12-06T04:31:13.240 |
[
{
"message": "I have GeoJson data. I would like to convert this GeoJson data into sdo_geometry object type and insert Oracle spatial database. Which columns represent geojson data in oracle sdo_geometry object.For example, My GeoJson Data is <pre><code> {\"type\":\"FeatureCollection\",\"features\":[{\"type\"... | Populating oracle sdo_geometry object using GeoJSON? | gis | 2017-12-06T06:58:01.803 |
[
{
"message": "I see lots of references for Tasseled Cap transformation for Landsat-8 Top of Atmosphere reflectance.Is the Tasseled Cap approach applicable for Landsat 5, 7, and 8 surface reflectance data as well?Landsat 5, 7, and 8 surface reflectance Tasseled cap transformation",
"role": "user"
},
{
... | Landsat 5, 7, and 8 surface reflectance Tasseled cap | gis | 2017-12-06T14:04:18.290 |
[
{
"message": "my problem addresses the union tool. I edited polygons in eight different layers because the area I investigate is quite big. Now I want to have all this edited polygons of these eight layers in one layer. The first problem is that when I use the union tool I have to choose a template which can on... | Polygons of different layers into one layer. ArcMap | gis | 2017-12-06T14:22:50.787 |
[
{
"message": "My question is quite related to the unanswered <a href=\"https://gis.stackexchange.com/questions/247528\">Split overlap between polygons into disjoint sets except I'm not using <code>shapely</code>, I'm using PostGIS 2.4 on PostgreSQL 10.I have a table containing multipolygons for administrative u... | Splitting overlap between polygons and assign to nearest polygon using PostGIS? | gis | 2017-12-06T15:37:46.970 |
[
{
"message": "I am very new to python and am attempting to select a municipalities pipe data by their QS number(in attribute table), dissolve the feature class on objected and qs# then export to a .gdb. I can do this one at a time but it requires me to reenter the QS number in parts of the script. I would also ... | Exporting multiple municipality Quarter Sections | gis | 2017-12-06T16:24:11.380 |
[
{
"message": "I have a 3000 mile long line that has quite a few gps errors where the line self intersects itself. Mapshaper does the best job of all the tools identifying these intersections on import, QGIS's intersections tool does not identify them. I can't find anything in the commands or documentation of ho... | Exporting identified intersections from mapshaper | gis | 2017-12-06T18:52:54.157 |
[
{
"message": "I have the following problem: I have a script * .py and I added it to a toolset. When using another computer and add my toolbox, it appears as an \"invalid tool\"<a href=\"https://i.stack.imgur.com/XpdPN.jpg\" rel=\"nofollow noreferrer\">and when I enter it to \"edit\" it, the script appears with ... | How to add a script to a shared toolbox | gis | 2017-12-06T19:35:18.567 |
[
{
"message": "I've been searching for an EPSG code for the coordinates I'm working with: geodetic latitude and longitude (not geocentric) and height above the WGS84 ellipsoid. I don't care about coordinate order. EPGS:7912 is very close but it's based on the GRS80 ellipsoid and my data is with respect to the WG... | EPSG code for a 3D CRS based on WGS84? | gis | 2017-12-06T20:27:42.823 |
[
{
"message": "I am trying to figure out Landsat 8 data corrections and calibrations. Actually, I don't really know how this can be done and which data needs what kind of correction and calibration for further processing. Basically new for these processing. So, I prefer to download already corrected and calibrat... | Are Landsat 8 data from ESPA corrected and calibrated? | gis | 2017-12-07T02:46:35.397 |
[
{
"message": "I downloaded calibrated/corrected Landsat 8 data (Level 2) from ESPA (<a href=\"https://espa.cr.usgs.gov/\" rel=\"nofollow noreferrer\">https://espa.cr.usgs.gov/) to do land cover classification. But there are many corrections and calibrations can be done as listed below and maybe more, such as:<p... | What are the necessary correction/calibration on Landsat 8 imagery for land cover classification? | gis | 2017-12-07T06:03:57.373 |
[
{
"message": "I try to load layer of population in U.S.A on base map of google earth satellite. this this part of the attribute table:<a href=\"https://i.stack.imgur.com/LlcE2.jpg\" rel=\"nofollow noreferrer\">My problem is that the point located in worng place:<a href=\"https://i.stack.imgur.com/rJUud.jpg\" re... | CRS of layers and google areal base map in QGIS 2.18- Error | gis | 2017-12-07T07:28:56.697 |
[
{
"message": "I have more than 3000 points that spread in in a very big area. I need to find all the points (blue) that are in distance of 50 minute drive time, from the stores (green stars). I want to calculate it in automate way on all the points, and not each point separately. Not all the stores located on t... | Calculating drive time in QGIS | gis | 2017-12-07T12:40:49.590 |
[
{
"message": "<pre class=\"lang-js prettyprint-override\"><code>var mymap = L.map('map').setView([53.7983587, -1.6191674], 11); mymap.createPane('labels'); mymap.getPane('labels').style.zIndex = 650; mymap.getPane('labels').style.pointerEvents = 'none'; var positron = L.tileLayer('http://{s}.basemap... | leaflet geojson coordinates to array | gis | 2017-12-07T14:23:12.560 |
[
{
"message": "I am using buffer tool on large complicated network (260,000 features) line shapefile to create an area shapefile. This area shapefile somehow has to be dissolved to a single multipart shapefile.Code used:<pre><code>arcpy.Buffer_analysis(featureLayer , temp2, \"0.5 Feet\", \"FULL\", \"FLAT\", \"AL... | Buffering with dissolve type: ALL for a big feature class doesnot create a single multipart feature | gis | 2017-12-07T18:00:19.727 |
[
{
"message": "I have function that takes a users coordinates and tests it against a polygon. When I create the fence with whole numbers such as [3,2], [3,4],[5,6],[3,2]. My function returns correctly. I tried inputting real data to create a geofence and used the chrome devtools to simulate a custom geolocation ... | TurfJS Intersect not functioning with real coordinates the way it does with regular numbers | gis | 2017-12-07T22:27:42.890 |
[
{
"message": "I am currently building a script to zoom to each providence within a country and export the providence and major cities (I have a layer for each) as a map package. I need it to select the record, zoom to selected record, run adefinition query, and export the result as a map package with labels as ... | Writing python script to export map package from each selected record in feature class? | gis | 2017-12-08T00:54:49.113 |
[
{
"message": "I have a grid of polygons and a shapefile with several types of points (POIs). Now I would like to count the number of POI classes lying within each polygon? With spatial join I only managed to get the total number of POIs within one polygon.Does anyone have an idea? I use ArcGIS 10.5",
"role"... | Counting number of points differing in specific attribute within polygon in ArcGIS Desktop? | gis | 2017-12-08T12:45:03.080 |
[
{
"message": "I have a road database in .osm.pbf format; I want, for a long list of GPS points, to classify whether they fall on (with a margin of, say, 20m)Highway: motorway, trunk, motorway_link, trunk_linkIntercity: primary, secondary, tertiary, primary_link, secondary_link, tertiary_linkOtherI'm open to use... | How can I classify GPS points with road type? | gis | 2017-12-08T13:27:44.400 |
[
{
"message": "I am not sure If I got the overall web-mapping architecture right. I can easily find tutorials about each part, but nothing on how to connect them.I have openlayers in the front-end, node.js as a server and postGIS as a DB. An action is done in the openlayers part, the data are sent to node, they ... | Forming queries with node.js, PostGIS and GeoServer? | gis | 2017-12-08T18:49:24.280 |
[
{
"message": "I'm new to OpenLayers and trying to experiment with this <a href=\"https://openlayers.org/en/latest/examples/feature-animation.html\" rel=\"nofollow noreferrer\">code snippet. The idea is to show the Los Angeles area and then overlay it with several points defined at certain latitude and longitude... | OpenLayers Lat Lon overlay animation doesn't work | gis | 2017-12-10T09:20:39.950 |
[
{
"message": "I recently downloaded the shapefiles for San Francisco from Mapzen. Now I am able to display the streets, but I would like to have a real map as a background image, such that it is easier to make the link between the real roads from San Francisco and the ones shown by GeoPandas. Here is the code t... | How to import a background image for overlay with GeoPandas | gis | 2017-12-10T15:56:19.023 |
[
{
"message": "I have used the <code>osgeo.gdal</code> module to save numpy arrays as GeoTIFF files successfully in python for some time. Today I decided to write a simple module to handle the driver and file creation routines. Calling my module to save a numpy array gives the following error:<pre><code>Tracebac... | GDAL driver.Create() TypeError for datatype argument | gis | 2017-12-10T17:14:02.997 |
[
{
"message": "I am trying to get Solar Radiation data from WorldClim version 2.0 in R,However, I am using the library raster in R but it seems to not be possible to download this data. (since there is only functions for bioclimatic data, Temperature, altitude, and precipitation)Does anyone know how to download... | WorldClim 2.0 Solar Radiation data | gis | 2017-12-11T04:12:18.343 |
[
{
"message": "I am trying to create raster file in the Mbtiles format. I tried ,<pre><code>$ gdal_rasterize -ot Byte -burn 255 -burn 0 -burn 0 -ts 4950 4090 -of MBTiles station.geojson station.mbtiles </code></pre>I'm using,<blockquote> $gdalinfo --version : GDAL 2.1.3, released 2017/20/01</blockquote>Error:<... | Create MBTiles from geojson in raster format | gis | 2017-12-11T10:07:36.230 |
[
{
"message": "I want to perform an analysis on urban areas in the UK. As, indeed, urban areas can be defined in multiple ways, I would like to rely on some well-accepted definitions and polygons.I found this <a href=\"http://database.espon.eu/db2/home\" rel=\"nofollow noreferrer\">EU project that has nice data ... | Functional urban areas in the UK | gis | 2017-12-11T11:45:56.797 |
[
{
"message": "I'm writing Python script in QGIS 2.18 to alert the user when multiple layers with different projections are added to the canvas. My codes are shown below. <pre><code>from qgis.gui import QgsMessageBarinput_layers = []layers = iface.legendInterface().layers()for layer in layers: if layer.type() =... | How to monitor changes in layers panel for QGIS? | gis | 2017-12-11T14:14:04.957 |
[
{
"message": "Using the modify interaction - the default behaviour is to show existing vertex as point when hover it. <a href=\"https://i.stack.imgur.com/cy1we.png\" rel=\"nofollow noreferrer\">(When the mouse is hovered over the left bottom vertex - the vertex is shown)Is there an option to always show the exi... | OpenLayers 4 Modify - There is an option to show the feature vertexes as point always?(not hover) | gis | 2017-12-12T11:37:42.073 |
[
{
"message": "I have 1 table of 20k records. there is a final_zone field where the zone could be either 'Conservation', 'ECZ', 'Protection'. there is another field called sub_zone and the conservation and ecz final_zones each have the possibility of having the sub_zone in it, but not every record has a sub_zone... | postgis union geometries that intersect but keep their original geometries/info in separate arrays | gis | 2017-12-12T20:08:20.240 |
[
{
"message": "I am having an issue when exporting atlas map series to image. In each map the position of the legend is jumping around by a few cm. I have the position referenced under item properties to the bottom right corner which I thought would mean the legend expands and contracts upward and left as the le... | QGIS map composer changing legend position when exporting atlas as images | gis | 2017-12-13T04:02:56.313 |
[
{
"message": "I'm using ArcGIS Pro Network Analyst to calculate the shortest route from all points in data set A to all points in data set B, according to a road map (shp format). The road map contains two types of roads (type 1 and type 2), both in the same file but differentiated with a variable in that data ... | ArcGIS Pro Network Analyst prioritized road map | gis | 2017-12-13T06:44:42.417 |
[
{
"message": "Is there anyone who can help me with SAR data. I am a beginner with this. Any tutorial/links will help.",
"role": "user"
},
{
"message": "This is a fairly broad question but I guess a good place to start would be with Sentinel-1 satellite imagery. Sentinel-1 is a C-band radar platform ... | SAR data for water body extraction | gis | 2017-12-13T06:49:40.040 |
[
{
"message": "I am trying to plot this <a href=\"https://www.dropbox.com/s/1yxkn17y7cplchs/MOD13Q1_2000-02-18.250m_16_days_NDVI.tif?dl=0\" rel=\"nofollow noreferrer\">raster on R. The object is quite big, but when plotting it using the <code>raster::plot()</code> function, I obtain a very tiny image, as attache... | raster::plot() plotting raster too small- is there an alternative on ggplot? | gis | 2017-12-13T11:53:46.920 |
[
{
"message": "I am unable to find in the Help / Resource the script if there is one, to remove certain characters in a column. Example MPRR-BLK39-T4S-29-01. I want to get rid of T4S for 25 parcels. Instead of going to each individual parcel and manually edit, is there a certain script that will delete out \"T4... | Scripting to remove specific characters in ArcGIS 10.4 | gis | 2017-12-13T16:13:46.490 |
[
{
"message": "The following WPS request successfully styles a png when the png is served over http. <pre><code><wps:Execute version=\"1.0.0\" service=\"WPS\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns=\"http://www.opengis.net/wps/1.0.0\" xmlns:wfs=\"http://www.opengis.net/wfs\" xmlns:wps=\... | WPS not accepting https in process input | gis | 2017-12-13T18:49:21.970 |
[
{
"message": "I have a file.csv like the following:<pre><code>37.0925854357,14.3860984446,0.0000079572,0.0000939491,0.000002893537.0978554286,14.5199850398,0.0000041594,0.0000821038,0.000004792437.1029267200,14.6538928343,0.0000024414,0.0000677266,0.000005063737.1077992514,14.7878210195,0.0000094944,0.000063295... | Converting .csv file to file.shp using Python gives IndexError? | gis | 2017-12-13T22:32:36.727 |
[
{
"message": "Is it possible to set feature geometry to multiple polygons and style them separately?Something like this ... imagine polygons is array with 4 polygons<pre><code>var PolygonFeature = new ol.Feature({ geometry: new ol.geom.Polygon(polygons)});</code></pre>or<pre><code>new ol.geom.GeometryCollect... | Openlayers 4 multiple geometries with different styles | gis | 2017-12-13T22:33:02.547 |
[
{
"message": "I have a layer with polygons, and I want to make a buffer but only for the ones that meet a condition (<code>\"MUNICIPIO\"=5</code>). When I make a fixed distance buffer, it makes a buffer for all the polygons in the layer. Is there a way to make a buffer only for the polygons I want?",
"role"... | Create a buffer for polygons that meet a condition with QGIS | gis | 2017-12-14T06:39:10.313 |
[
{
"message": "I am trying to print OSM as a basemap through GeoServer. The WMS typed layer gets printed but the OSM doesn't. The projection coordinates I am using is ESPG:4236. But I found that the majority of OSM basemap through GeoServer uses ESPG:900913 coordinates. However I somehow managed to pull some dat... | Failure in printing OSM as a basemap through GeoServer Mapfish Plugin | gis | 2017-12-14T08:52:13.693 |
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