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 run Extract by Mask through a loop using Search Cursor, where the Cursor is defined by the row \"FID\" in a table from a grid shapefile. The code is as follows: <pre><code>import arcpy, osfrom arcpy import envoutws = r\"C:/path2/\"raster = r\"C:/path1/raster.tif\"fc = r\"C:/path... | Error on Extract to Mask | ArcPy | gis | 2017-07-24T11:38:04.693 |
[
{
"message": "I've received a CAD template and need to use this as an ArcGIS layout template. I can go to layout view in ArcGIS and \"convert features to graphics\" as suggested in <a href=\"https://gis.stackexchange.com/questions/32287/using-a-cad-template-in-arcgis\">this answer.This answer suggests redrawing... | Convert CAD to graphics for layout template in ArcGIS | gis | 2017-07-24T15:01:30.937 |
[
{
"message": "I have downloaded Landsat 8 higher level surface reflectance product from USGS to genetare chlorophyll map in lake. But the individual bands contain some negative surface reflectance values. So, when I am applying the regression model, the logarithmic scale turns those values to NA. Does someone k... | Negative values in Landsat 8 surface reflectance higher level product | gis | 2017-07-24T22:50:37.087 |
[
{
"message": "I've tried everything I can including all the possible projection transformations....these lng, lat's make no sense.Here is a sample coord with its disclosed mapping. The point is in British Columbia, Canada (I'm mapping the BC Wildfires presently underway).(1302838.303, 517054.973) ----> EPSG_43... | Bizarre Long, Lat coordinates....don't make sense at all | gis | 2017-07-25T07:23:59.897 |
[
{
"message": "I have been encountering difficulties trying to extract the raster pixel values from a polygon shapefile that has been assigned the same CRS. The problem under inspection is how to get a list or a table with coordinates and pixel values from a polygon shapefile over a singleband raster for further... | Extract raster pixel values from shapefile in QGIS | gis | 2017-07-25T13:42:32.050 |
[
{
"message": "I have configured a WMS layer for OpenLayers like:<pre><code>var wmsSource = new ol.source.ImageWMS({ url: 'http://<servername>/geoserver/<namespace>/wms', params: {'LAYERS': [ 'Layer 001', 'Layer 002', ... 'Layer xxx' ]}, ratio: 1.2, serverType: 'geoserver'})var wms = new ol.laye... | OpenLayers layer-switcher for WMS layers | gis | 2017-07-25T13:45:27.183 |
[
{
"message": "I am trying to assign attributes from one point layer to another point layer based on closest location. So I am trying to use a spatial join and generate the ArcPy code in order to ensure reproducibility. I have tried two ways to do a spatial join. First, \"right click on the layer file in the tab... | ArcGIS: Error 999999 in spatial join | gis | 2017-07-25T13:46:29.880 |
[
{
"message": "I'm using Google Earth Engine for Land Cover change detection, I would like to know whether we can generate Error Matrix (Accuracy Assessment) for a classified image in Earth Engine or not?",
"role": "user"
},
{
"message": "Yes, you can. <a href=\"https://developers.google.com/earth-e... | Accuracy assessment using Google Earth Engine? | gis | 2017-07-25T17:10:24.103 |
[
{
"message": "Looking at a rooftop in Google Maps, I noticed a strange texture on it which was not at all apparent from a view on the ground. I viewed the same spot in Google Earth to look at it across time. The strange texture was present as far back as 2009 but after that, although the texture went away, that... | What's this rooftop texture found in Google Maps imagery - is it an artifact? | gis | 2017-07-25T21:32:56.887 |
[
{
"message": "I have a raster whose values range from -1.4 to 1.4. I want to reclassify this to range only between -1 and 1. So all values less than -1 should get a value of -1 and all values greater than 1 should get a value of 1. All other pixels should have the values they had originally. Ive tried the Con t... | How to use conditional statement to reclassify raster in ArcGIS? | gis | 2017-07-26T08:35:20.060 |
[
{
"message": "I'm trying to create a labeled heat-map of incidents. Currently, I can label every town in the state -- which clutters up my map -- or I can have no labels at all. My boss would like me to instead label only the towns where we have an incident recorded. I've been trying to puzzle out a solution us... | QGIS conditional labeling of towns | gis | 2017-07-26T13:08:34.987 |
[
{
"message": "I have a set of topographic sheets in a form of non-georeferenced *.bmp rasters, and a shapefile representing footprints of those topographic sheets.What I need to do is to using corresponding footprint coordinates.All rasters have fixed dimensions of 7323 * 7323 pixels, and the actual grid that ... | Generating world files for a set of non-georeferenced rasters using QGIS? | gis | 2017-07-27T11:59:38.173 |
[
{
"message": "I have some projects where I work with this coordinate system:<blockquote> DHDN_3_Degree_Gauss_Zone_4<br> WKID: 31468 Authority: EPSG<br> Projection: Gauss_Kruger<br> False_Easting: 4500000.0<br> False_Northing: 0.0<br> Central_Meridian: 12.0<br> Scale_Factor: 1.0<br> Latitude_Of_Origin: 0... | Transforming between ETRS89, WGS84, and Gauß-Krüger correctly using ArcGIS Desktop? | gis | 2017-07-27T12:29:57.667 |
[
{
"message": "I'm trying to create a drop down menu in a Python script in ArcMap where one input is a CSV and the other input is a drop down of the headers in that CSV. Is this possible at all? <a href=\"https://i.stack.imgur.com/Nxlg6.png\" rel=\"nofollow noreferrer\">In the image above, \"Candidate List\" is ... | Creating drop down of derived fields from CSV using ArcPy? | gis | 2017-07-27T13:50:30.100 |
[
{
"message": "I am using Multi Linear Regression (stepwise method) to estimate above ground biomass. Different spectral indices and other variables mostly derived from Landsat 8 OLI are used to check potential relationship with the biomass samples. (The biomass samples range between 7 to 37 tons). The adjusted ... | Getting Negative values in Regression based Biomass model! | gis | 2017-07-28T05:22:48.947 |
[
{
"message": "I am trying to reference an image to a map using the georef plugin. We have images from electrical resistivity tomography which are normal pngs with image coordinates. and we have measured points in the field by an RTK GPS measurement. What I need is a linear referencing of the image (only worldfi... | Rotate & Shift Image with QGIS Georef Plugin | gis | 2017-07-28T06:11:48.513 |
[
{
"message": "Since our ArcGis applications are developed as desktop and as server applications, I'm looking for a way create our SQL-queries in a safe way. The state of the art to mitigate SQL-injection is, to use <a href=\"https://www.owasp.org/index.php/Query_Parameterization_Cheat_Sheet\" rel=\"nofollow nor... | Parametrized queries for ArcGis? | gis | 2017-07-28T09:53:40.733 |
[
{
"message": "Is QGIS or the API QGIS able to split a first polyline shape layer by a second points shape layer as show in the figure bellow.Is this possible?The goal is to calculate segments length between points.The points are positioned exactly on the polyline.In this example, there would be 3 segments.<a hr... | QGIS API : Split a first polyline layer by a second points layer | gis | 2017-07-28T13:54:18.157 |
[
{
"message": "The python version of QgsPoint takes just two floating point parameters, unlike the C++ equivalent. The QGIS API docs for <a href=\"http://qgis.osgeo.org/api/classQgsPoint.html#a55c315abda73e46b7f41b56e0ee65493\" rel=\"nofollow noreferrer\">QgsPoint gives this example:<pre><code>pt_z = QgsPoint(12... | Creating 3D points in PyQGIS? | gis | 2017-07-29T21:59:41.863 |
[
{
"message": "I want to create some squared features with OpenLayers 4, add attributes to each feature and want to save them on the GeoServer to load them later on to another map. I am able to create the features, add attributes to them, read the attributes again and load a layers as WFS again. My only problem ... | Save features and attributes as WFS in GeoServer | gis | 2017-07-30T14:11:57.047 |
[
{
"message": "I use QGIS, version 2.18.9. I´ve several polygon-shapes with topological errors. Before I tried to apply the \"intersection\"-tool and got the message: Input layer A contains invalid geometries (feature 77). Unable to complete intersection algorithm.Firstly, I used the \"check-validity\"-tool, whi... | Solving topological errors like invalid geometries in QGIS? | gis | 2017-07-30T18:08:12.590 |
[
{
"message": "I'm trying to extract a section of a raster file that overlaps with a polygon shapefile in QGIS 2.18.3. When I run extract, I'm left with a large null value area as part of the extent of the output raster.I have the polygon (.shp):<br><a href=\"https://i.stack.imgur.com/FP0Xo.png\" rel=\"nofollow ... | Extracting raster by mask outputs raster with extent beyond the mask layer's in QGIS | gis | 2017-07-30T23:36:57.010 |
[
{
"message": "I have multiple dwg files and I need to convert them from CAD file to shapefile using Arcpy. I am trying to export each layer in .dwg file (i.e. annotation, point, polygon, polyline and Multipath layers, etc.) to shapefile as contains subsets of data within it.I don't know how to access each layer... | Converting multiple drawing files to shapefiles | gis | 2017-07-31T23:57:33.630 |
[
{
"message": "Given a geodesic line (starting point and initial azimuth) is there an algorithm to find the longitude of the [first] crossing of a given parallel? I have already checked with Clairaut's constant that the geodesic will reach said parallel, so the crossing exists.Or should I iterate the direct prob... | Finding crossing point between geodesic line and parallel? | gis | 2017-08-01T06:53:33.747 |
[
{
"message": "I want to classify LiDAR vegetation points in low and mid vegetation, using LAStools.High vegetation is simple to get, using top of canopy (first return), but how about low vegetation, and mid? Following ASPRS standards they are class 3 and 4, respectively. How could I separately isolate these cla... | Classifying LiDAR data to mid vegetation using LAStools? | gis | 2017-08-01T14:24:09.463 |
[
{
"message": "I'm working in Qgis with python console.I have a file .asc whose structure is:<pre><code>Ncols 49Nrows 52Xllcorner 2611187.75Yllcorner 4336914.199Cellsize 1000NODATA_value -99990.5081 0.679 -9999 ...</code></pre>I have to find the Max and the Min value in the file and I tried:<pre><code>GridFile =... | Max and Min value from an ascii grid | gis | 2017-08-01T14:27:47.633 |
[
{
"message": "When wanting to use the different modules in GRASS 7.2.1 I get this error. The version of qgis is 2.14.17 on 64 bit windows.<a href=\"https://i.stack.imgur.com/X4UYh.png\" rel=\"nofollow noreferrer\">I already checked that grass can find the right provider folder path.Who knows how to get grass wo... | cannot start grass modules in gqis 2.14 | gis | 2017-08-01T14:52:40.403 |
[
{
"message": "Follow-up to <a href=\"https://gis.stackexchange.com/questions/250719/figuring-out-whether-a-feature-is-visible-or-not-in-pyqgis\">this question, after input considering <a href=\"https://gis.stackexchange.com/questions/247810/how-to-change-visibility-of-a-particular-layer-category-in-pyqgis\">thi... | Can I rely on the order of layer categories in pyqgis? | gis | 2017-08-02T10:25:32.397 |
[
{
"message": "I've only just started using QGIS (done some things in ArcGIS before) and SAGA tools don't work. The results don't make sense, QGIS stops answering or there is a python error.Could it be that there is something wrong with the installation? Or do I need to learn some python to fix it?",
"role":... | SAGA tools not working in QGIS 2.18 | gis | 2017-08-02T13:24:26.590 |
[
{
"message": "I have choropleth map with graduated colors. The column - the field name - that I choose to define the classes and the colors is important for my work on the maps. Is there a method to make it visible or refer to it at any other part of QGIS. It would be especially useful in the print composer, wh... | Getting selected column/field for graduated color via expression or other routine in QGIS? | gis | 2017-08-02T14:50:25.070 |
[
{
"message": "I am trying to use DateDiff to calculate the difference between today's date and the initiated date of various projects. I created a new field called \"Duration of Day\" and I tried the calculation: DateDiff(\"d\", [INITATIEDATE], Now()) , this however keeps coming up as an error and will not work... | Calculating between today's date and date field in attribute table ofArcGIS Desktop? | gis | 2017-08-02T15:21:35.837 |
[
{
"message": "Coordinates of the upper left corner=286185.598266, 5180967.071686, Coordinates of the lower right corner=286223.863098, 5180909.674438Pixel size=0.0463053,-0.0463053How is the image size calculated, if the coordinates and pixel size are known?Approximately should be 1024х 1536Is there a script o... | How to calculate the image size knowing its coordinates and pixel size? | gis | 2017-08-03T06:33:18.623 |
[
{
"message": "Can someone please tell me how will I discard the clouds from Landsat 8 images using R? I have used the code<pre><code>LC08_20151128_new <- cloudMask(LC08_20151128, threshold = 0.8, blue = \"layer.1\", tir = \"layer.9\", buffer = NULL, plot = FALSE)</code></pre>I read that for landsat 8 layer 1... | Cloudmask in Landsat 8 images | gis | 2017-08-03T08:55:46.480 |
[
{
"message": "I need to generate a runtime geodatabase for map visualization on my android device. Back in the days we used ArcGIS with local file-geodatabases, where we were just able to export a runtime geodatabase. Nowadays we have to use QGIS with an object-relational database and I was not able yet to find... | Create a runtime geodatabase in QGIS for an Android app | gis | 2017-08-03T09:17:05.257 |
[
{
"message": "I have three rasters:Raster1: resolution 25x25, floating point. Value of \"1\" when it is true, value of -9999 when it is false (only this two values)Raster2: resolution 25x25, floating point. Only integer values from 194 to 1738Raster3: resolution 25x25, floating point. Decimal values are stored ... | Raster calculation with multiple rasters using ArcGIS Desktop? | gis | 2017-08-03T10:21:46.027 |
[
{
"message": "I am creating multiple ring buffer around points. I am using <a href=\"https://plugins.qgis.org/plugins/Multi_Ring_Buffer/\" rel=\"nofollow noreferrer\">Multi Ring Buffer plugin of QGIS. When I am creating 5 ring buffers of a single point its returning a shape I desire but in Attribute Table there... | Multiple Ring Buffer for Multiple Points | gis | 2017-08-03T12:30:56.783 |
[
{
"message": "I would like to have the border of the data frame to fit exactly the maps that are shown inside, so in other words, I want to get rid of blank spaces. I know, this is possible by dragging the borders and moving the map inside the frame with the handle but I am looking for another option for layout... | Setting data frame to match exact borders of map using ArcGIS Desktop? | gis | 2017-08-03T15:44:54.917 |
[
{
"message": "I have been working on this problem for a while now and have asked two seperate questions regarding it (<a href=\"https://gis.stackexchange.com/questions/247962/counting-events-from-a-grib-raster\">Counting events from a GRIB raster, <a href=\"https://gis.stackexchange.com/questions/250016/valueer... | GDAL program produces only zeroes, regardless | gis | 2017-08-03T20:07:49.463 |
[
{
"message": "Quick Overview of the Project: I have 9000 records of individuals, each with a coordinate pair in a csv. I also have a shapefile/folder(dbf, prj, sbn, sbx, shp, shx) of municipalities within the range of coordinates. I'd like to know which municipality(shape) in the shapefile corresponds to each r... | Converting Shapefile points to Lat/Long? | gis | 2017-08-03T20:26:02.633 |
[
{
"message": "I have a question related to legend. I have a series of layers as the picture below. I want to add legend (symbology) base on categories on that map. For example, if I select layer land use, the symbology (color and categories) will appear on that map. <a href=\"https://i.stack.imgur.com/ptyRn.jpg... | Adding Leaflet legend based on symbology? | gis | 2017-08-03T22:39:28.030 |
[
{
"message": "I am trying to build a map using Carto Builder that compares the average price of single family housing and multi-family housing by neighborhood. The data are offset centroids for each neighborhood, sized by the average cost of each type of housing. It is important that each data set use the same ... | Making legends in Carto Builder reflect custom class breaks for graduated symbols? | gis | 2017-08-04T00:11:22.553 |
[
{
"message": "Are there any complete, public, styles in Mapbox-GL/JS format that use <a href=\"https://mapzen.com/projects/vector-tiles/\" rel=\"nofollow noreferrer\">Mapzen's vector tiles? The only one I can find is <a href=\"http://mapzen.github.io/mapboxgl-vector-tiles/\" rel=\"nofollow noreferrer\">Mapzen's... | Mapbox-GL-JS styles that use Mapzen's vector tiles | gis | 2017-08-04T01:39:25.030 |
[
{
"message": "i've just been saving (via /save as) a geopackage in qis (2.18.11) - which worked pretty fine. the output layer CRS information is correctly identified as WGS84 includig EPSG code (4326).the same geopackage in arcgis 10.4 (and 10.5) is identified as a WGS84 but EPSG information is missing - thus t... | arcgis geopackage - Coordinate System | gis | 2017-08-04T11:49:54.607 |
[
{
"message": "I am analyzing several LANDSAT scenes from the LANDSAT 8 OLI mission (18 in total, all from Jan 2017 - cloud cover < 20%).I now want to calculate the NDVI and do some land cover classification on these scenes using R and its RS packages, but first need to apply some corrections to these scenes.... | Processing LANDSAT 8 data in R (using packages Raster, RSToolbox, etc.) in order to calculate NDVI and land cover classification? | gis | 2017-08-04T16:21:37.160 |
[
{
"message": "My unpublished android app happily maps Land Information New Zealand vector property boundaries above a backdrop of aerial photographs.It directly obtains the individual tiles from LINZ using HTTP GET - for example:<pre><code>http://tiles-a.data-cdn.linz.govt.nz/services;key=eb4828b0ef9144ada0bf7c... | What network protocol does QGIS use for WMTS tile retrieval? | gis | 2017-08-06T03:51:05.210 |
[
{
"message": "I have an SQL table containing ID, longitude and latitude (WGS84) of several points. I would like to add a new column containing the new latitude of every point projected 5Km north.I see that PostGIS offers the tool <a href=\"http://postgis.net/docs/ST_Project.html\" rel=\"nofollow noreferrer\">ST... | ST_Project all points in a table | gis | 2017-08-06T13:25:14.360 |
[
{
"message": "I was wondering if there is a way I could easily include three parameters into a box (red box in the example) and so when there are a lot of inputs it's easier for a user to spot what data belongs to what sets of inputs. Is there a way to give a title to the box (\"Summary text\" in red in the exa... | Adding box to toolbox created with ArcPy (only visuals)? | gis | 2017-08-06T14:28:40.213 |
[
{
"message": "I have a geoJSON file of all the counties in Michigan. I have embedded this file in a Leaflet map. <a href=\"https://i.stack.imgur.com/wMuwi.png\" rel=\"nofollow noreferrer\">I want each of these county polygons to display the name of the county in a pop-up when clicked on. This is basically a dup... | leaflet: Different information popups for each polygon | gis | 2017-08-07T12:27:10.917 |
[
{
"message": "Is there a way to disable the FieldCalcBar thingy, which appears in attribute table when the layer is in editing mode? I suppose there should be a checkbox in Settings -> Customization... dialog window, but so far haven't found the right one.",
"role": "user"
},
{
"message": "You can h... | Disabling FieldCalcBar in QGIS | gis | 2017-08-07T15:54:55.170 |
[
{
"message": "I am trying to iteratively interpolate a shapefile using the QGIS IDW interpolator. What I need to do is take a point shapefile with time series data in the columns associated with each point, interpolate that column of data to raster, then move to the next column, creating a new raster for each ... | Iterative Interpolation w/ Built-In Python Console Not Changing Columns in PyQGIS? | gis | 2017-08-07T16:56:56.320 |
[
{
"message": "I have a shapefile of points that has a field of yield data from harvesting. I am trying to 'smooth' the data by taking each point and collecting all points within 50ft and then update the shapefile with the average of the 50ft. circle. The end goal is that I want a shapefile with every point havi... | Python collect all points that meet a criteria for every point in the shapefile | gis | 2017-08-07T21:11:57.613 |
[
{
"message": "I have a database (SQL Server) with a table having lat-long information for sites that keep getting updated daily. I want to create a web application to plot the same on map and add other features to it like buffer creation, shortest distance, heatmap etc. We have the Standard (editor) license lev... | Creating web app using GeoServer and linking ArcGIS Desktop to it? | gis | 2017-08-08T06:06:27.757 |
[
{
"message": "When I create a model in the Graphical Modeler Tool I need to add layers using ‘Add File’. When I run the script, I have to add the same files each time (Which can lead to adding numerous files). Since none of the layers change, how do I add links to specific files? The image below shows only two ... | QGIS Graphical Modeler Add Specific files | gis | 2017-08-08T12:44:52.287 |
[
{
"message": "Working for an environmental agency, they ask me to edit in ArcGIS the sizes of the buffers for the same layer. Is that possible to change it using python in the field calculator? If yes, I seek an example of python code or if there is another way I'll take too.",
"role": "user"
},
{
"... | Editing buffers in Arcmap 10.3 | gis | 2017-08-08T14:53:59.650 |
[
{
"message": "I found this code snippet in <a href=\"https://gis.stackexchange.com/questions/223497\">Selecting features within certain buffer distance of selected feature using PyQGIS?, which is almost what I'm looking for, except I don't have polylines but points and I want to find another layers points in ra... | Iterating over point layer and select another layer's points in radius using PyQGIS? | gis | 2017-08-09T08:30:37.750 |
[
{
"message": "I'm using QGIS 2.18.10. I want to open the following WFS into QGIS:<a href=\"http://www.geoportal.lt/inspire-services/rest/services/INSPIRE/Transport_networks_CommonTransportElements/MapServer/exts/InspireFeatureDownload/service\" rel=\"nofollow noreferrer\">http://www.geoportal.lt/inspire-service... | QGIS fails to open REST Service | gis | 2017-08-09T12:04:38.303 |
[
{
"message": "In QGIS 2.18 I draw polygons on a certain grassland-type on aereal imagery. Sometimes, there are other landcover-types within the patches of interest, so I'd like to draw polygons with holes.In the example, I want to exclude the small forest-patches within the grassland. Is there any procedure oth... | Drawing polygons with holes in QGIS? | gis | 2017-08-09T17:27:34.330 |
[
{
"message": "I am trying to make a map with a semi-transparent (60%) raster layer overlying an areal photo (raster) base map. This works fine and looks good but when I add a legend to display the values of the raster overlay, the legend items for the associated raster are transparent as well and end up lookin... | Print Composer with semi-transparent raster but full opacity in legend | gis | 2017-08-10T23:05:27.043 |
[
{
"message": "I am working in an application of PostgreSQL. I have a list of points and want to create square of 500 sq. feet around these points. These points are in Geometry (EPSG:4326) format.Every point is center of square and final size of square should not be changed. I have created a script in PostgreSQL... | Lessen the overlapping in Polygons created on a road in PostgreSQL | gis | 2017-08-11T09:48:35.580 |
[
{
"message": "I'm calling this:<pre><code>http://www.overpass-api.de/api/xapi?debug=*[amenity=hospital][bbox=13.20524,43.70861,13.22842,43.72338]</code></pre>And I have a result that is correct, since it shows me the only hospital in the area. Then, following the instructions explained in <a href=\"https://gis.... | Overpass API call JSON result is different from XML result | gis | 2017-08-12T11:36:57.303 |
[
{
"message": "I set <code><LayerLimit>1</LayerLimit></code> in service metadata in capabilities file to restrict the number of layers that the client is permitted to request in a single GetMap request. But when I add a new WMS layer in QGIS, still I can select multiple layers simultaneously and mult... | How does LayerLimit in WMS capabilities work in QGIS 2.18.11? | gis | 2017-08-14T09:59:56.590 |
[
{
"message": "I need to use the Graphic Modeler to decipher if Polygon A (Site Boundary) contains or intersects another multipart polygon. If the polygon does intersect I need to to return Yes and if not No within a column in the original polygon. My initial research suggests using v.select... however im not to... | QGIS Graphic Modeler: Does Polygon A contain or interset Polygon B | gis | 2017-08-14T14:37:07.213 |
[
{
"message": "I have a series of latitude/longitude pairs and I form Point() objects for each pair. I would like to form buffer regions around each point using a Haversine distance argument instead of Euclidean distance. That way, points on the boundary of the buffer are an equal Haversine distance away from ... | How to Specify Haversine when using Buffer Method in Shapely and how to get Haversine distance between two Shapely Point objects? | gis | 2017-08-14T21:15:35.980 |
[
{
"message": "In QGIS, when I go to add a MSSQL table, it recognizes the geometry type and SRID of some tables and not others. When it doesn't recognize these I can set them manually and load the data without a problem. What do I have to set within SQL Server to have QGIS recognize the geometry type and I have... | Why does QGIS recognize the geometry type of some MSSQL tables and not others? | gis | 2017-08-15T01:15:57.203 |
[
{
"message": "Using ArcGIS 10.2 Basic, the functions to export and import XML workspace documents (gdb schema) are greyed out. I have seen the previous discussions here, but the suggestions didn't help. It shouldn't depend on the ArcGIS version or license level, right?",
"role": "user"
},
{
"message... | Export GDB Schema to XML Workspace Document | gis | 2017-08-15T07:00:22.420 |
[
{
"message": "I wonder if someone knows a way to calculate time-cost isochrones in a bike road network layer, taking the slope into consideration.The GRASS tool \"v.net.iso\" allows to create a line-vector layer with categories depending of how far the roads are from a determinated point. Having the data about ... | QGIS: GRASS "V.net.iso" + Slope | gis | 2017-08-15T07:33:49.210 |
[
{
"message": "Is anyone clever enough to extract longs and lats for the points shown at:<a href=\"https://www.northernpowergrid.com/generation-availability-map\" rel=\"nofollow noreferrer\">https://www.northernpowergrid.com/generation-availability-mapWhat would be even better is finding out if those points hold... | Extract longitude - latitude from GIS generated map embedded in website | gis | 2017-08-15T16:03:28.210 |
[
{
"message": "I've understood that the processing algs are going to be implemented in the master version of qgis. What is the best way to track the status of which algs that are implemented and the plan for the rest?",
"role": "user"
},
{
"message": "I guess calling various methods from classes is s... | Where to track the status of Processing in QGIS 2.99? | gis | 2017-08-15T17:03:32.183 |
[
{
"message": "I'm trying to dynamically set my Carto map's dot colors based on a JavaScript variable.<pre><code>var queryAllRows= \"SELECT+\" + colNames.join(',') + \"+FROM+MY_TABLE_NAME\";queryAllRows= queryAllRows.replace(' ','+')var queryAllRowsURL=\"https://ACCOUNT_NAME.carto.com/api/v2/sql?q=\" + q... | How do I set map dot colors based on a JavaScript variable? | gis | 2017-08-15T20:46:45.857 |
[
{
"message": "I am interested to download ESRI Bump Map Tools for ArcGIS referred in the below link,<a href=\"https://blogs.esri.com/esri/arcgis/2010/01/21/introducing-the-arcgis-bump-map-tools/\" rel=\"nofollow noreferrer\">https://blogs.esri.com/esri/arcgis/2010/01/21/introducing-the-arcgis-bump-map-tools/I h... | Downloading ArcGIS Bump Map Tools? | gis | 2017-08-16T06:57:50.047 |
[
{
"message": "In relation to this question <a href=\"https://gis.stackexchange.com/questions/252227/split-polygon-with-polygon-in-different-tables-layers\">here as the image below.<br>I have a multipolygon geometry (red lines) that i want to turn into lines so i can use it to split another multipoint polygon (b... | Convert multipoint polygon boundary to line | gis | 2017-08-16T13:38:24.710 |
[
{
"message": "I need to perform a stratified sample in the following context.I have two layers; the first is a point layer (which consists of dwelling centroids.) The second is a vector layer of polygons with each polygon being an electoral area. There are multiple dwelling points contained within one electoral... | Stratified sampling with a point and polygon layer | gis | 2017-08-17T12:46:08.443 |
[
{
"message": "I have this feature class<a href=\"https://i.stack.imgur.com/4Osha.png\" rel=\"nofollow noreferrer\">I would like it to be :FirstSecondThirdFourthUnsuitableWaterNo dataThe only was I know how to sort it in the Symbology tab is alphabetically. I know I can also rearrange them in the legend in Layou... | Special sorting of symbols in a layer | gis | 2017-08-17T16:20:46.360 |
[
{
"message": "I'm using snapping in a web map for a move/rotate custom tool. According to the <a href=\"https://developers.arcgis.com/javascript/3/jsapi/map.html#enablesnapping\" rel=\"nofollow noreferrer\">API documentation the default option is to set all feature and graphics layers in the map to be target sn... | ArcGIS web map snapping precision | gis | 2017-08-17T22:33:27.470 |
[
{
"message": "I'm trying to use GeoPandas to generate points of intersection between two linear shapefiles. For example, I have a shapefile of pretend pipelines (red) and some crossings (blue).<a href=\"https://i.stack.imgur.com/teC0X.png\" rel=\"nofollow noreferrer\">What I would expect, are points wherever th... | Intersecting lines to get points in geopandas | gis | 2017-08-18T05:29:47.690 |
[
{
"message": "I'm trying to create the function below using \"COPY TO\". The problem comes up here: <pre><code>TO '/tmp/'||**NEW.gid**||'_gsv.html';</code></pre>I need to use a variable for the filename based on NEW gid value but I do not understand how.<pre><code> CREATE OR REPLACE FUNCTION public.long_lat_... | PostGIS - "COPY TO" | gis | 2017-08-18T11:29:50.610 |
[
{
"message": "I am trying to setup up a enterprise geodatabase with ArcGIS 10.4.1 and PostgreSQL 9.4 where I can use PostGIS for my SQL queries in PostgreSQL and have the sde functionality. I have a windows computer.My process so far was:install postgresql/postgiscopy st_geometry dll over to postgresql librun c... | PostGIS and ArcSDE mixed environment | gis | 2017-08-18T13:46:23.530 |
[
{
"message": "I am using QGIS 2.18.11 and need to select 250 points from the existing points in a map. I know that I can randomly select points through Vector> Research Tools> Random Selection but I don't know how to make it \"reproducible\" (replicable). I don't know much about Python.",
"role": "user"
}... | Setting seed value for random selection in QGIS? | gis | 2017-08-18T19:25:10.697 |
[
{
"message": "I want to reduce the size of my selected polygons. In other words, I want to implement the \"scale\" program which is in the editor section of ArcGIS. For that purpose I have searched a lot and just found the example for point features as following. But my problem is that when I copy this code to ... | Reducing area of polygons using ArcObjects with C#? | gis | 2017-08-19T04:45:55.160 |
[
{
"message": "<pre>QGIS > Composer > Export as image > *.TIF</pre><br />I need to apply lossless compression (e.g. LZW or ZIP), when exporting a map from QGIS (v2.18) composer to TIF image. This settings are missing in the export dialog. Where/How can I set it up?<br />(I know that I can export and re-save with... | How to apply compression (e.g. LZW) when exporting a map from QGIS composer to TIF? | gis | 2017-08-21T16:01:49.787 |
[
{
"message": "I have a layer that represents a road network. The lines for the roads don't always meet, but I want them to.<a href=\"https://i.stack.imgur.com/b90X8.png\" rel=\"nofollow noreferrer\">I want to make the pink lines join to the nearest segment of the blue line. I followed the instructions to clean ... | Snap lines based on hierarchy | gis | 2017-08-22T01:28:58.610 |
[
{
"message": "I am trying to georeference a raster map from Nepal.What CRS should I use? PROJ.4 or WKT form.I will use the UTM grid to base my reference points on. On the map there is reference to:Scale 1:50000Everest 1830 SpheroidModified UTM ProjectionOrigin Long 87E Lat 0NFalse Coordinates at Origin Easting ... | What CRS to use to georeference map? | gis | 2017-08-22T08:13:46.650 |
[
{
"message": "I'm currently working on a large dataset of roads. In which i have to check if the roads in 1:250 000 have the same road number as those in 1:50 000. Because of alot of generalization I have to make a radius serch in 1:250 000 to be sure i have gotten the road into the spatial join. For this to wo... | Selecting attributes which have comma delimiter | gis | 2017-08-22T09:08:21.610 |
[
{
"message": "I will have talk about OSM in next few week and I just wondering if there any tools, scripts, or websites to showing the statistic of number registered OSM User per country.Because I have an idea to displaying the number of registered user (for example by countries or one country per years) in my ... | Is there any web, scripts, or tools to calculate number of registered OSM user in each country? | gis | 2017-08-22T10:22:17.553 |
[
{
"message": "I created my process in QGIS graphic interface with treatments. In my process I need to create a vector grid. This algorithm allows a vector layer to define my extent. But in the graphical modeler I can't do it, I have to enter an extent like this: <pre><code>-0.793282323236,-0.792284809119,45.249... | Vector Grid, Graphical Modeler & Input Extent | gis | 2017-08-22T12:27:15.330 |
[
{
"message": "I have a dataset of lines with a start and end elevation value in the attribute table. I want to apply this value to the Z coordinate of the start/end vertex respectively to create a 3D line. The lines themselves do not represent a single Z value like a contour; each line represents a sloped downw... | Creating sloped lines from XYZ in QGIS | gis | 2017-08-22T12:55:45.733 |
[
{
"message": "the GIS app would have climate data of a district in raster format (extrapolated surfaces of weather station data for rainfall, temperature etc) and ACCEPT health data (e.g. geocoded malaria infections data for sampled health facilities in same district) over the same period and show the effects o... | Web GIS App to analyse sub-national health and climate data | gis | 2017-08-22T14:59:46.787 |
[
{
"message": "I have an ID field that is a text datatype. The IDs in the field have a prefix, and are padded with zeros to always be a specific length. Examples:INSP000098INSP000099INSP000100INSP000101I would like to use the Field Calculator to generate sequential IDs for new records (records are <a href=\"http... | Sequential IDs with field calculator: Pad a prefixed field to specific length | gis | 2017-08-22T18:59:50.573 |
[
{
"message": "I have a LiDAR dataset with some missing data right in the middle of my map. I would like to use a 5m DEM to fill in the missing areas. Is there a way in QGIS to merge the two but only use the 5m data in the missing location?",
"role": "user"
},
{
"message": "I'm not aware of any way ... | Merging one DEM into another to fill in missing data using QGIS? | gis | 2017-08-23T07:14:26.390 |
[
{
"message": "I am writing a python script providing a number as output in QGIS toolbox. My question is where does the script put my result number if I use <code>##result=output number</code> and assign a number like <code>result=1.0</code>?So the complete script would be something like:<pre><code>##result=outp... | Where does `##x=output number` in PyQGIS script store number? | gis | 2017-08-23T08:26:08.263 |
[
{
"message": "I loaded to CoverageStore -> ImageMosaic 3 rasters for different date. On viewing layers I need to be able select what tif I viewing now, but I do not see way to to select what I am viewing now.<a href=\"https://i.stack.imgur.com/W3Hog.png\" rel=\"nofollow noreferrer\">",
"role": "user"
},
... | Changing displayed rasters in GeoServer? | gis | 2017-08-23T11:52:45.007 |
[
{
"message": "I have a roof as an OSM building, which I need to convert to an elevation raster to be used for QGIS calculation, with a raster resolution of 9pts/sqm.Typical OSM building would be: <a href=\"http://city.informatik.uni-bremen.de/~jeff/complex1.osm\" rel=\"nofollow noreferrer\">http://city.informat... | Conversion of OSM building to elevation raster | gis | 2017-08-23T12:14:22.633 |
[
{
"message": "I was wondering how to implement a directed (or one-sided) Hausdorff distance function in PostGIS?I looked into the <a href=\"https://github.com/postgis/postgis/blob/9ca34e6790224fd00c65aff1c82cd91ca396455f/postgis/lwgeom_geos.c#L164\" rel=\"nofollow noreferrer\">PostGIS 2.3.3 source code, and it ... | Directed Hausdorff distance in PostGIS? | gis | 2017-08-23T18:43:42.597 |
[
{
"message": "I have a French Postcode map which looks fine on screen. It's CRS is EPSG 2154 - RFG93/Lambert 93. Pretty much any French shapefile when added looks like it's leaning back suggesting to me, I'm no expert in this area, that the projection is wrong. I can see both views for each layer when I use zoo... | QGIS Projections/CRS Issues? | gis | 2017-08-23T19:13:54.563 |
[
{
"message": "<pre><code>public void AddScalebar(IPageLayout pageLayout, IMap map) { if (pageLayout == null || map == null) { return; } IEnvelope envelope = new EnvelopeClass(); envelope.PutCoords(0.2, 0.2, 1, 2); // Specify the location and size of the scalebar ... | way to view this map | gis | 2017-08-24T05:30:27.507 |
[
{
"message": "In order to extract raster values in QGIS I want to use the grass command v.what.rast.points in the toolbox. But the process won't start - it claims: \"Where conditions of SQL statement without 'where' keyword\". What am I supposed to fill in?Another problem: I created an extra attribute column fo... | v.what.rast.points: What to fill in as 'WHERE' conditions? | gis | 2017-08-24T09:41:11.607 |
[
{
"message": "Question:Given a Polygon exhibiting linear-like qualities (long and thin, with clear extremities upon visual inspection), is there a reasonable/defensible order of operations to compute \"start\" and \"end\" points from the geometry?A <a href=\"https://gist.github.com/kuanb/3b6c08143657b5296b466a6... | Programmatically infer start and end points from a Polygon with linear characteristics | gis | 2017-08-24T22:14:25.480 |
[
{
"message": "So I have a list like this:<pre><code>list = [[[-3, -2, 2], [3, -2, 2], [3, 2, 2], [-3, 2, 2]], [[3, -2, -2], [-3, -2, -2], [-3, 2, -2], [3, 2, -2]], [[-3, -2, 2], [-3, 2, 2], [-3, 2, -2], [-3, -2, -2]], [[-3, 2, 2], [3, 2, 2], [3, 2, -2], [-3, 2, -2]], [[-3, -2, -2], [3, -2, -2], [3, -2, 2], [-3,... | 3D Polygons from list | gis | 2017-08-25T07:24:20.793 |
[
{
"message": "So I have a list like this:<pre><code>list = [[[-3, -2, 2], [3, -2, 2], [3, 2, 2], [-3, 2, 2]], [[3, -2, -2], [-3, -2, -2], [-3, 2, -2], [3, 2, -2]], [[-3, -2, 2], [-3, 2, 2], [-3, 2, -2], [-3, -2, -2]], [[-3, 2, 2], [3, 2, 2], [3, 2, -2], [-3, 2, -2]], [[-3, -2, -2], [3, -2, -2], [3, -2, 2], [-3,... | 3D Polygons from list | gis | 2017-08-25T07:24:20.793 |
[
{
"message": "Is there a way to set specific rules when creating a thematic map in MapInfo? I would like to exclude the polygons that have too many of the items I want to represent from the thematic map (something like \"restrict dot density map to polygons with population < 10000\").",
"role": "user"
... | Rules within thematic maps in MapInfo | gis | 2017-08-25T11:19:04.523 |
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