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": "In QGIS 2.18 there is an option to wrap text based on a certain character. What I need is to automatically wrap my text on the ' ' (space) character IF the character length exceeds the size of my legend box. Question is: how do I get an expression builder in the supplied warp box?In this example I... | Auto wrap legend text based on character count | gis | 2017-08-25T11:21:16.207 |
[
{
"message": "I am currently working in Qgis (2.18.11) and I would like to view mi map window duplicated so I can represent a thematic map with different values in each window and compare both. I usually do this in MapInfo (Map > Clone view). See the example:<a href=\"https://i.stack.imgur.com/3fuxs.png\" rel=\... | Is there a "clone view" functionality in Qgis like in MapInfo | gis | 2017-08-25T11:37:49.540 |
[
{
"message": "I'm trying to import a custom function from the python console, but it return the error:<pre><code>'QgsExpressionFunction' object is not callable</code></pre>My example function (saved as function.py file in /.qgis2/python/ directory) is:<pre><code>from qgis.core import *from qgis.utils import qgs... | Import a custom function from the python console | gis | 2017-08-25T12:30:11.383 |
[
{
"message": "I am using leaflet.heat for creating heatmap with leaflet API.I have a highest intensity of 1.0 and lowest 0.0. When I am drawing a heatmap in the highest zoom its all are showing the same color. I have plotted the value over the heat color. Here you can see what I am getting in the attached Image... | Intensity Wise Gradient is not working in leaflet.heat | gis | 2017-08-27T12:04:34.377 |
[
{
"message": "I have created a custom CRS for El Salvador using this parameters in a proj.4 string, based on <a href=\"https://gis.stackexchange.com/questions/192778/converting-a-nad27-lambert-conformal-conic-custom-projection-to-wgs84-using-qgis\">this question:<pre><code>+proj=lcc +lat_1=13.31666666666667 +la... | Results of layers created with a custom CRS are loaded with a generated CRS in QGIS | gis | 2017-08-28T06:33:49.610 |
[
{
"message": "I am a game developer and I am not good in GIS, but it contains very useful data for our future project, my final goal is to generate height map for terrain render. I found a way to extract (convert) opened ASC file raster layer form 32 bit to 4 8 bits images, I changing min-max in layer propertie... | QGIS understanding of evaluation units | gis | 2017-08-28T10:02:53.077 |
[
{
"message": "We use Mapserver to create a composite of multiple layers from another WMS server. We noticed that a single request to Mapserver creates multiple requests to the \"upstream\" WMS server. Apparently Mapserver uses smaller tiles (that are based on the layer \"SizeX\" and \"SizeY\" config) instead of... | Disable tiling when Mapserver requests layers from external WMS server | gis | 2017-08-28T13:44:31.610 |
[
{
"message": "I want to generate an output raster map which indicates the areas of wind and solar energy potentials. My study area is India.I have created GHI (Global Horizontal Irradiance) raster map (by interpolating point GHI values available). Similarly, I created wind speed map,by interpolating MERRA satel... | weighted sum overlay of raster layers (Wind resource map and GHI Map) | gis | 2017-08-29T07:35:06.670 |
[
{
"message": "I have students in my GIS class who have created feature layers in ArcGIS Pro to collect points on our campus using Collector on a cell phone. After going out to collect points they return to the classroom to edit those points. While they are able to update attributes on ArcGIS Online they are u... | Cannot edit location of points in Feature Layer in ArcGIS Online after using Collector | gis | 2017-08-29T14:37:14.380 |
[
{
"message": "I have a feature layer found in this map: <a href=\"http://arcg.is/0L8SS5\" rel=\"nofollow noreferrer\">http://arcg.is/0L8SS5 which is to be used with Collector as a part of a classroom activity. The feature layer is producing the error message \"The shape must have a Z value\". Is the only sol... | Z-value Error in ArcGIS Collector | gis | 2017-08-29T14:44:33.763 |
[
{
"message": "I've just finished processing my DEM and ortho files, and have been asked to make my hillshade layer. I'm not sure whether to use my DEM or ortho file with this tool. What is the difference between those two files, and which one should be used with the hillshade tool?",
"role": "user"
},
{... | Should I use my DEM or ortho file to create my Hillshade layer? | gis | 2017-08-29T17:02:51.080 |
[
{
"message": "FEMA has an updated flood WMS that doesn't seem to be working. The URLs they say to use are:Use the following URL in your GIS Application:<a href=\"https://hazards.fema.gov/gis/nfhl/services/public/NFHLWMS/MapServer/WMSServer\" rel=\"nofollow noreferrer\">https://hazards.fema.gov/gis/nfhl/services... | Cannot seem connect to WMS server | gis | 2017-08-29T22:49:17.040 |
[
{
"message": "So, while wondering about shape simplification in the eternal struggle for optimization, I find out (here on SE) that Geoserver and PostGIS can and will (by default) perform the trick on the fly (see <a href=\"https://gis.stackexchange.com/questions/225003/small-features-dont-draw-when-zoomed-out-... | Geoserver shape simplification performance | gis | 2017-08-30T15:01:04.980 |
[
{
"message": "I have the following code to diplay a WMS layer (in Geoserver) with an OL basemap:<pre><code>var extent3857 = [-6016334, -2369948, -5843698, -2271608];var projection3857 = new ol.proj.Projection({code: 'EPSG:3857',extent: extent3857,units: 'm'});var baselayer = new ol.layer.Tile({source: new ol.so... | How to configure a WMS layer to display with Google maps | gis | 2017-08-30T20:06:32.760 |
[
{
"message": "Recently started using QGIS 2.18, for basic mapping.I am using Swedish GEO-agancy data shapefiles as bottom layers with my own shapefiles as toplayers (EPSG:3006 (SWEREF99 TM)), including a GPX file (EPSG:4326 (WGS84)) manipulated by GPXeditor.When using the Print Composer to export the map as a G... | Print Composer Reference map | gis | 2017-08-31T10:57:28.987 |
[
{
"message": "I have a pyqgis script which customises the functionality of the grass algorithm r.lake.coords:<pre><code>##Seed Points Lake=name##DEM_input=raster##Seed_vector_points=vector point##Overspill_vector_boundary=vector polygon##output=folder# Import classesfrom qgis.core import QgsRasterLayerfrom qgis... | Using pyqgis logic to stop process if output has no geometry | gis | 2017-08-31T11:08:02.983 |
[
{
"message": "I have satellite swath data in the form of an HDF5 file containing 3 arrays: 'data_array', 'latitude' and 'longitude'.All three are 32-bit floats, are arrays of the same dimensions (X-by-Y) and the names are self-explanatory. All three datasets use a fill value of -32767What I want to do it reproj... | Reprojecting swath to lat lon grid? | gis | 2017-08-31T13:00:47.797 |
[
{
"message": "I´m trying to obtain GeoTIFF files to use them in Photoscan from ASCII files.My process is as follows: I have 200 ASCII files more of less, I use the ASCII to raster tool in batch mode process in Arc GIS and with this I obtain an ESRI Raster, then I want to use the convert tool of QGIS to obtain t... | Obtain GeoTIFF with ASCII files | gis | 2017-08-31T20:17:26.967 |
[
{
"message": "Is there a way to edit a shapefile which is locked as a layer in the layer and style within the composer? For example I had a shapefile consisting of 50 ponds which were added to the composer atlas as the coverage layer. Each map within the composer might contain trees around ponds then another wi... | Editing QGIS Composer Locked Layer Shapefiles | gis | 2017-09-01T12:21:30.857 |
[
{
"message": "Windows 10, ArcGIS 10.4.1/ArcScene 10.4.1.5686I have a geotiff that I pulled in from a pdf. I'm in an edit session of ArcScan and when I Show Preview, the output looks great. However, whenever I try to Generate Features, I receive the following error:<blockquote> The map does not contain an edita... | Error "generate features" with ArcScan vectorization | gis | 2017-09-03T13:56:37.910 |
[
{
"message": "I'm trying to load a WMS in my application, but I get the following error:<blockquote> 400 (Bad Request)</blockquote>Confusingly enough I still get an empty image.The corresponding request is:<pre><code>http://sg.geodatenzentrum.de/wms_dop40?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&FO... | openlayers 4.2 400 Error Code (Bad request) | gis | 2017-09-04T10:23:04.477 |
[
{
"message": "In Leaflet it's possible to bind one or more <a href=\"http://leafletjs.com/reference-1.2.0.html#tooltip\" rel=\"nofollow noreferrer\">tooltips to an individual marker, or a layer, or the base <code>map</code> object.<a href=\"https://i.stack.imgur.com/WEg1x.png\" rel=\"nofollow noreferrer\">How c... | How to close all tooltips defined against the map object? | gis | 2017-09-05T06:43:40.990 |
[
{
"message": "I downloaded quite large OpenStreetMap dataset from <a href=\"https://www.geofabrik.de/\" rel=\"nofollow noreferrer\">https://www.geofabrik.de/ in osm (or pbf) format. Namely Czech Republic. Geofabrik provides ESRI SHP files too, but I unfortunatelly need more attributes (are not included in prebu... | Importing large OSM data to QGis failed (using QuickOSM, SpatialLite layer or add vector layer) | gis | 2017-09-05T07:45:29.967 |
[
{
"message": "Is there any good, complete API for the GDAL Python bindings?I am interpolating and rasterizing points with elevation data using the <code>gdal.Grid()</code> method;<pre><code>output = gdal.Grid('outcome.tif','newpoints.vrt') </code></pre>In its most basic sense, it's working perfectly. But now, ... | Python - gdal.Grid() correct use | gis | 2017-09-05T14:06:26.750 |
[
{
"message": "I have a point layer and a line layer coming from PostGIS. Points represent sensors (two for each side of the road), lines are GPS tracks. I need to move the sensor locations towards the lines. As I cannot take the closest track in each case, I decided to do it manually because I only have around ... | Drag points on lines with snapping in QGIS 2.18 | gis | 2017-09-05T14:56:43.607 |
[
{
"message": "I am not so seasoned at GeoTools libs, I am trying to transform a large (near 60K features) GML file. I want to change its CRS and features coordinates accordingly. The code I have is basically this:<pre><code>public void parse(String crs, InputStream collection) throws Exception { Configuration ... | Deal with large GML files with GeoTools | gis | 2017-09-05T15:33:11.037 |
[
{
"message": "Is there a method to save GDAL/OGR Utilities <code>--config</code> default options? For example I almost always want to use the <a href=\"/questions/tagged/gdaladdo\" class=\"post-tag\" title=\"show questions tagged 'gdaladdo'\" rel=\"tag\">gdaladdo option for smallest possible jpeg-in-tif... | Set default GDAL/OGR config options? | gis | 2017-09-05T21:00:14.030 |
[
{
"message": "In my attribute table I have a column named 'BYGN_STAT' which includes information about building status (RA, IG, FA etc.) and dates (YYYYMMDD).I would like to split this column, and separate building status 'IG' with the following dates. The length of the dates varies from one date to many.I need... | Split column in the attribute table | gis | 2017-09-06T09:43:51.923 |
[
{
"message": "I run the following code to first select specific attributes using a query and then I need to delete them<pre><code>from osgeo import gdal, ogrimport os##shapefile = \"D:/New.shp\"##driver = ogr.GetDriverByName(\"ESRI Shapefile\")##dataSource = driver.Open(shapefile, 0)shapefile = ogr.Open( \"D:/N... | Deleting selected features from Vector/OGR in GDAL/Python? | gis | 2017-09-06T11:15:04.530 |
[
{
"message": "I have an .mxd that is using absolute pathnames. I want to change this property to use relative pathnames but the option is disabled, grayed out, when I go to the .mxd properties. It is actually grayed out every every .mxd I try. How do I enable this option?<a href=\"https://i.stack.imgur.com/Fu6E... | Why is the mxd property "Pathnames" disabled? | gis | 2017-09-06T16:26:52.817 |
[
{
"message": "I want to convert my polygon layers into point layer where I will have a point for each grid of 100m *100m grid for entire polygon layers using PyQGIS ? I don't know any library function for grid creation and way to extract single point from the gird Point may be centroid of grid.That's why I have... | Converting polygon in grid points for each grid of 100m*100m in PyQGIS? | gis | 2017-09-06T18:49:33.977 |
[
{
"message": "I am using ui-leaflet on my ionic 1 mobile app which is the same as angular-leaflet-directive shown in the <a href=\"http://plnkr.co/edit/DepJeg?p=preview\" rel=\"nofollow noreferrer\">plunker link.I am getting the user location and adding it to the marker and circle in the map, the issue i am hav... | how to remove previous marker automatically before adding new marker | gis | 2017-09-06T22:25:27.217 |
[
{
"message": "I have several dozen points plotted across the UK. Each point represents a facility that serves local people. To estimate the catchment areas of each facility I created Voronoi polygons around them, and clipped the polygons to the UK borders (using a UK shapefile). I then coloured each polygon acc... | Voronoi that don't cross boundaries | gis | 2017-09-07T09:51:56.740 |
[
{
"message": "I'm trying to get a better understanding of the limitations of world files and how I can use them in a current project. If I produce an ESRI world file (tfw) with <a href=\"http://geotiff.maptools.org/listgeo.html\" rel=\"nofollow noreferrer\">listgeo:<pre><code>listgeo -tfw clip.tif</code></pre>T... | Down sample with imagemagick then import worldfile? | gis | 2017-09-07T20:17:11.307 |
[
{
"message": "I am new to ArcGis. I created a JSON service that creates a GeoJSON file. I ran the output through GeoJSONLint and it is exactly what I'm expecting and the point features show up on their map.Here's my GeoJSON:<pre><code>{ \"metadata\": { \"title\": \"Hurricane Track\" }, \"type\... | Can't add GeoJSON layer to ArcGis js 4.4 | gis | 2017-09-08T03:49:42.093 |
[
{
"message": "I have coordinates which has degree format, i want to convert it into decimal format,For this i want to grab Degree , Minutes and seconds from coordinates.Standard format is DDMMSS N / DDMMSS E , But i have one special type of coordinates.The coordinate is :<pre><code>4729N00937E , 472027N0114441... | Identify the degree , Minutes and seconds from coordinates | gis | 2017-09-08T06:35:24.733 |
[
{
"message": "I'm working on rasterizing some polygons using gdal_rasterize. This works great, but I want the rasterize command to place features with lower FIDs on top of those with higher FIDs. (Gdal_rasterize currently takes the latest polygon and burns that value onto the raster). I can think of a way to do... | Reversing the order of features in a layer using OGR | gis | 2017-09-08T16:14:00.887 |
[
{
"message": "If you wanted to collect all Sentinel satellite data for a given region of interest (ROI), say, for a given day or time frame - is there any simple way to do it? That means: Without having to download all the full images manually and cropping the ROI subset manually as well afterwards?",
"role... | Is there a simple way to collect the Sentinel data of a given ROI? | gis | 2017-09-09T15:57:26.187 |
[
{
"message": "I have two MapServer WMS layers that I want to overlay on each other in OpenLayers. One comes from vector data in a PostGIS table, and the other comes from raster data in another PostGIS table. They both have the same projection in PostGIS, the mapfile, and OpenLayers (EPSG:4326). The vector layer... | How can I make these two MapServer WMS layers align correctly with each other in OpenLayers? | gis | 2017-09-09T16:21:50.493 |
[
{
"message": "With <code>sp</code> package I generate automatically boundaries for different sets of spatial points. I'm trying to perform the same workflow with <code>sf</code> package but i had problems for detecting holes in the way <code>sp</code> does.To this dataset i calculate a set of lines that make up... | sf lines to polygons with holes | gis | 2017-09-10T02:41:40.283 |
[
{
"message": "I am trying to style a land cover map scheme II, on Geoserver. The sld has no errors. However, the raster value/color on the image couldn't match with the raster color/image/label on the sld. Below is the sld.<pre><code> <?xml version=\"1.0\" ?> <sld:StyledLayerDescriptor version=\"1.0... | Geoserver couldn't read SLD - Raster Symbolizer as expected | gis | 2017-09-10T11:32:57.367 |
[
{
"message": "I am trying to do a union across thousands of different geometries. The geometries can be very complex so a naive union can take many hours. I then want to dump these geometries so each polygon becomes its own shape rather than one very large multipolygon.However, I have extra information about th... | Fast Union with Known Geographic Locations | gis | 2017-09-10T18:39:17.717 |
[
{
"message": "(I asked this question on stackoverflow, but since there were no solutions, and it has a GIS component, I thought I'd ask here).I have an excel file with minimum and maximum projected x and y coordinates. I used the function rect to make rectanglesThe code looks something like this, (the plot boun... | Exporting from R to QGIS | gis | 2017-09-10T19:13:23.983 |
[
{
"message": "Trying to find a way programmatically (arcpy) move the legend if it intercepts features within a data frame, in the scenario below, if the legend obscures the view of the AOI, then I want it to move to a different corner until its not an issue. This has to be on top of the data frame as opposed to... | Move legend if it overlaps features within dataframe using ArcPy | gis | 2017-09-11T06:45:41.167 |
[
{
"message": "Trying to find a way programmatically (arcpy) move the legend if it intercepts features within a data frame, in the scenario below, if the legend obscures the view of the AOI, then I want it to move to a different corner until its not an issue. This has to be on top of the data frame as opposed to... | Move legend if it overlaps features within dataframe using ArcPy | gis | 2017-09-11T06:45:41.167 |
[
{
"message": "I am drawing Geoserver layers on google map using Leaflet. Base database for Geoserver is PostgreSQL.In PostgreSQL there is a table that stores Millions of polygon.These polygons are in the form of square of 300 sq. feet each. I want to search polygons within 50 Miles in circular radius from map's... | Adding map current location(Latitude and Longitude) in ViewParams of Geoserver WMS using Leaflet | gis | 2017-09-11T09:25:07.747 |
[
{
"message": "I want to add 0 (zero) to existing field.I have textual field with numbers, sort ascending, 1-100:12...1314...99100I want to make field like this:001002...013014...099100Is it possible to do this with some function (trim or somehow)?",
"role": "user"
},
{
"message": "You could use some... | How to make new field with new characters | gis | 2017-09-11T10:09:59.210 |
[
{
"message": "If I need to generate a polygon that crosses the anti-meridian, does it exists a Python library that treat such cases (partitioning such polygon and generate a multipart polygon)?",
"role": "user"
},
{
"message": "I would suggest looking into <a href=\"http://xarray.pydata.org/en/stabl... | Does exist a Python library to generate polygons avoiding antimeridian issues? | gis | 2017-09-11T16:15:34.343 |
[
{
"message": "I am VERY new to ArcMap and GIS in general.I converted some lidar data to a GEOTIFF, using a program called CARIS (it was an .csar file) and imported this into ArcMap. There are some areas that are showing up as black (0,0,0). Is there a way to modify these pixels to match the surrounding data, or... | Edit RGB values of 0,0,0 | gis | 2017-09-11T16:15:35.353 |
[
{
"message": "I'm using QGIS 2.18,12 with the GRASS module 7.2.1 on Windows. When building a model in QGIS , I am not able to see all the algorithms possible under thr GRASS module, that are indeed available within QGIS, but simply not in the graphic modeler. Specifically, I need to use v.out.ogr (screenshot at... | QGIS Graphic Modeler not including all GRASS algorithms - How to include v.out.ogr? | gis | 2017-09-11T17:43:34.800 |
[
{
"message": "BackgroundI have a lot of, I mean a lot of rasters (GeoTiffs, around 10000) stored in a PostgreGIS database. I have developed a website and I want to allow users to extract a raster based on its storage date and display it on a base map. The following image is expressing an example of what I wan t... | Publish rasters in PostGIS into ArcGIS Server | gis | 2017-09-12T05:57:34.497 |
[
{
"message": "I want to calculate \"remote sensing reflectance\" from Sentinel 2 image, which is derived from \"water leaving radiance reflectance\" of a water surface, to extract information of Total Suspended Matter and CDOM in a water body. From my understanding, I need to perform an atmospheric correction ... | Remote sensing reflectance from Sentinel 2 in SNAP, ArcGIS or QGIS | gis | 2017-09-12T14:17:06.360 |
[
{
"message": "In England, when submitting applications for Countryside Stewardship Scheme woodland grants you are required to mark on a paper map, supplied by the authority, the woodlands that are to be included.The requirements are very specific, they require a red outside boundary, with a yellow inside, as in... | Is it possible to create vector style in QGIS that is a border inside border? | gis | 2017-09-12T16:55:33.870 |
[
{
"message": "In addition to calculating the <a href=\"http://www.gitta.info/DiscrSpatVari/en/html/spat_depend_join_ct_stat.html\" rel=\"nofollow noreferrer\">joint count statistic, I would like to compare the actual count of joins to the theoretical maximum count of joins. I know how to compute the statistic a... | Find maximum theoretical join count (spatial statistics) | gis | 2017-09-12T17:42:47.697 |
[
{
"message": "I have a DEM which I want to find a point with largest amount of visibility ,I know that viewshed leads to visibility from a point but how can I find a point with highest visibility ?One way is to loop every pixel in my DEM and then calculate visibility for each pixel. but this is not a very cleve... | Seeking algorithm to find point on surface with highest visibility? | gis | 2017-09-12T19:31:42.840 |
[
{
"message": "I have some text in a column in QGIS, I am using field calculator, I need to replace it with some other text. This is what I have so far: <code>replace(\"url\", 'Y:\\Natural Environment Record\\', 'http://www.exmoor-nationalpark.gov.uk/PAttachments//NER/')</code>It doesn't seem to like this, any ... | Changing a string of text in QGIS | gis | 2017-09-13T13:40:19.723 |
[
{
"message": "I am confused about results given to me by PostGIS using <a href=\"https://postgis.net/docs/geometry_distance_knn.html\" rel=\"nofollow noreferrer\"><-> operator.I have expected it will just order the result by distance, but result of <code>some_point <-> another_point</code> and result o... | Effective PostGIS ORDER BY distance of points | gis | 2017-09-13T15:00:56.517 |
[
{
"message": "I'm using very MODIS Swath products and need to import some bands to TIF. I'm working with MOD06_L2, MOD07_L2 and MOD11_L2 products and the MRT Swath isn't work as well. I'm using the following code:<pre><code>gdalwarp -of GTIFF -tps -t_srs EPSG:4674 HDF4_EOS:EOS_SWATH:\"MOD11_L2.A2014001.1305.006... | Batch conversion of Modis Swath (level 2) data | gis | 2017-09-13T19:37:13.887 |
[
{
"message": "Can't post code because of Fed policy, so I will ask the question here.We are working on a series of polygon feature classes that are used to define large activity areas. These polygons are modified using arcpy such that activity exclusion areas are cut out of the larger polygon. To accomplish thi... | arcpy.da.Editor not saving edits to base Oracle Spatial tables | gis | 2017-09-14T14:48:17.267 |
[
{
"message": "I was attempting to save a Shapefile point file as a CSV. My Shapefile only has one attribute (id). I use the <code>Save Vector Layer as...</code> tool by right clicking on the shapefile I want to convert.I have chosen <code>Comma Separated Value (CSV)</code> from the FormatI select the folder a... | Save As CSV puts extra comma on header line | gis | 2017-09-14T18:23:18.407 |
[
{
"message": "How do i get a new line in a Geoserver style CSS ?<pre><code>{label: [name] (need new line here) [pop];}</code></pre>Details: [name],[pop] are attributes of the layerIs there a comprehensive CSS documentation with examples for Geoserver? I want the label to look like this <a href=\"https://i.stack... | New line in Label ,CSS Geoserver | gis | 2017-09-15T08:37:18.577 |
[
{
"message": "I have a classified raster dataset (A). I've transformed it to polygon type data and then have applied a fishnet to it.(B) Now i want to assign a single class to a single grid (polygon type i need) with the \"winner takes all\" method (C). Am i doing right with changing data type from raster to po... | Applying Winner Takes All method to raster data in ArcGIS Desktop? | gis | 2017-09-15T09:52:36.123 |
[
{
"message": "How can I convert a 3d polyline shape to a 2d in QGis?",
"role": "user"
},
{
"message": "Save a copy with Save vector layer as...Take care that the Include z-dimension option is unchecked.<a href=\"https://i.stack.imgur.com/SP4Kd.png\" rel=\"nofollow noreferrer\">",
"role": "assist... | Convert 3d shapefile to 2d in QGIS | gis | 2017-09-15T13:37:33.523 |
[
{
"message": "Is there a way to count the number of data driven pages a polygon is on in an ArcGIS mapbook? I need to identify parcels that expand across multiple sections (which is my index for creating data driven pages), and I do not have any keys that would allow me to tie parcels to sectionsI was able to ... | ArcGIS Data Driven Page Polygon Count | gis | 2017-09-15T16:33:52.060 |
[
{
"message": "Having the following GeoJSON:<pre><code>{\"geometry\": {\"coordinates\": [[[0.0, -89.9999999999], [0.0, -87.5], [120.0, -87.5], [120.0, -89.9999999999], [0.0, -89.9999999999]]], \"type\": \"Polygon\"}, \"properties\": {\"grid_cell_index\": 1}, \"type\": \"Feature\"}</code></pre>I'm trying to load ... | gdal.VectorTranslate returns empty object | gis | 2017-09-15T20:01:23.097 |
[
{
"message": "I want to create a animate map using the TimeManager plugin in QGIS and then be able to upload it as an assignment at school.Once it is created, how can I save the animated map as a video?",
"role": "user"
},
{
"message": "Referencing the <a href=\"http://planet.qgis.org/planet/tag/tim... | Exporting Animated/Time series maps | gis | 2017-09-18T00:16:04.437 |
[
{
"message": "I am working on forest change detection in an area. I have taken two satellite images 2001 and 2016 to depict the forest change. I have taken four classes while classifying the images i.e., forest, non-forest, snow and water bodies. I want to know, how we can make contingency table of both the tw... | How to make contingency table for two satellite images in R language | gis | 2017-09-18T09:05:55.763 |
[
{
"message": "I am trying to join points to polygons. To be more precise I have a dataset with points associated with a particular political event. Each point comes with latitude and longitude and other information. And I have a shapefile that has polygons that have regional data information at the Nuts1 level.... | ArcGIS Points to polygons spatial join | gis | 2017-09-18T11:46:08.903 |
[
{
"message": "I have a webapp built in ArcGIS Online using the available templates, I want to move it to ArcGIS Server, I cannot find Esri's 'official' way to do it. Where can I find it?",
"role": "user"
},
{
"message": "Check out <a href=\"https://developers.arcgis.com/web-appbuilder/\" rel=\"nofol... | Migrating web app from ArcGIS Online to ArcGIS Server? | gis | 2017-09-18T20:11:56.383 |
[
{
"message": "I'm having real problems trying to fit a GeoPDF to a set of shapefiles using <code>gdaltransform</code> and <code>gdalwarp</code>. The problem I can't seem to fix is that each time I run the commands, whether in QGIS or command line, the new GeoTiff is always off by a few hundred meters. I've read... | Which EPGS code is the actual CRS in this GeoPDF? | gis | 2017-09-19T00:59:13.780 |
[
{
"message": "i am using cartodb.createLayer() function to prepare my web application. I have tried to pass vizjson url and metadata method both to get my layers from my carto account which has total of 8 layers in a map. But i am not able to render my map data on application, so far i have tried these two code... | how cartodb.createLayer function works | gis | 2017-09-19T05:51:18.700 |
[
{
"message": "I would like to be able to cut polygons such as the one below, in QGIS, at a set distance either side of a specified feature on another layer, in this case a footpath line from OS Mastermap.In this way I would then effectively have a buffer along the lines that could represent a woodland ride netw... | Cutting Polygons in QGIS at a specific distance from a feature in another layer | gis | 2017-09-19T12:13:33.493 |
[
{
"message": "I am trying to print a map made in an earlier version of QGIS, but now the text annotations are not appearing in the print composer. \"Draw map canvas items\" is checked on. Am I missing something else perhaps? I've tried in both version 2.14 and 2.18 (running on a Mac with Sierra).Here is the ... | Text Annotation not appearing in Print Composer | gis | 2017-09-19T13:13:08.990 |
[
{
"message": "I'm struggling with an ArcGIS JavaScript API 4.4 popup.There are dozens of attributes on dozens of layers, which is a lot of coding if I have to specifically mention and format every single one. I want to bring in every attribute that is published in a given feature layer, and thought this would w... | Why won't all the attributes show in the popup? | gis | 2017-09-19T17:50:52.040 |
[
{
"message": "Shapefile is being imported to Oracle DB. Is there a tool to export this spatial data as a shapefile without writing any SQL (like you have to do with SQL Developer and GeoRaptor)?EDIT: from all your answers I understand that there is no way for me to do action: import shapefile X to my database a... | Is it possible to export spatial data from database to shapefile without writing SQL manually? | gis | 2017-09-20T07:27:21.160 |
[
{
"message": "I have the task of inserting a polygon in a map with a specific size. My idea is to simply \"draw\" a polygon and keep on enhacing its size, until it reaches the size I actually want to be. Its basically an easy task, but i'm wondering if i could directly have the polygon in the size i want it to ... | Polygon in specific size | gis | 2017-09-21T12:00:05.467 |
[
{
"message": "I have a vector layer in QGIS with 30000 points. I want to delete those with values lower than a specific value. I could not use filter in an edited layer, and I could not filter the layer after editing it. What can I do?",
"role": "user"
},
{
"message": "you can do it by open attribut... | delete points in a vector layer | gis | 2017-09-21T15:20:36.583 |
[
{
"message": "So I will be creating a web application in .NET. It's a data entry application where someone will be inputting a bunch of a stuff from a datasheet and we'll suck it into some database tables that are part of an ArcSDE database. Some of this data will be \"manufactured\" with conditional statements... | Can you do simple geoprocessing in .NET framework? (not mapping applications, not desktop add-ins) | gis | 2017-09-21T17:24:07.797 |
[
{
"message": "Is it possible to have two property layer dialogs open at the same time? I would like to see the properties of two layer's fields at the same time.I need this because when I want to join two layers by a common field I like to check they are of the same type. I am using 2.18.11.",
"role": "user... | Comparing type of fields of different layers in Qgis | gis | 2017-09-22T11:22:04.917 |
[
{
"message": "My cartoDB map has several observations/points and sometimes they are clustered. I have infowindows setup for each point and it displays when I click on them. The problem happens when these points are close to each other. The window will popup for the first chosen point, but unless I close it or z... | My click infowindow does not change for nearby points. | gis | 2017-09-22T15:30:45.697 |
[
{
"message": "I have a 1x1meter DEM and the original LiDAR point cloud. I need to create a vector feature with roads. Are there any tools in ArcGIS to do this? Or any ideas for the algorithms to try to do this in R or Matlab? <a href=\"https://i.stack.imgur.com/b5dhD.jpg\" rel=\"nofollow noreferrer\">",
"ro... | Extract linear features (roads) from DEM | gis | 2017-09-22T16:24:19.013 |
[
{
"message": "I am trying to set up a custom tool via a python script in ArcMap. I want the tool to be able to create a point feature with X/Y input and then pass that point into the buffers. My thinking is that someone could use the tool to find what is inside the radius from their given point that they input ... | Create Point Feature with XY and Generate Multiple Buffers (ArcPy Tool) | gis | 2017-09-23T14:56:05.710 |
[
{
"message": "I have a <code>TIFF</code> file, looks like this:<pre><code>**Driver: GTiff/GeoTIFFFiles: quickbird2015.tif quickbird2015.tif.aux.xmlSize is 15106, 5106Coordinate System is:GEOGCS[\"unknown\", DATUM[\"unknown\", SPHEROID[\"unretrievable - using WGS84\",6378137,298.257223563]], P... | how to convert this satellite image to RGB image | gis | 2017-09-24T15:40:07.703 |
[
{
"message": "I installed ArcGIS for Desktop 10.4.1, ArcGIS for Server 10.4.1 and Web Adaptor, now I need to install Portal for ArcGIS, I looked for the trial version in the ESRI's website but in vain. Is there any link I can access to get the Portal?",
"role": "user"
},
{
"message": "Portal for Arc... | Installing Portal for ArcGIS? | gis | 2017-09-24T16:24:18.050 |
[
{
"message": "the title seems weird though, i am dealing with Japanese shapefile and it has its own \"bizarre\" projection.I have two hints to solve this issue.it's based on espg 4301 (<a href=\"http://pacificprojections.spc.int/4301#\" rel=\"nofollow noreferrer\">http://pacificprojections.spc.int/4301#)but the... | Multiply or Divide certain numbers on a projection file(?) of Japan | gis | 2017-09-25T06:30:06.630 |
[
{
"message": "I have point data that shows incidents in the years from 2011 to 2015 and it includes the specific time an incident occurred.I would like to use the time slider functionality in ArcGIS Online to show the incidents that occur in each hour over a period of 24 hours. For example: I would like it to s... | ArcGIS Time Slider - show hourly data only | gis | 2017-09-25T10:09:27.417 |
[
{
"message": "I am looking to get Strahler Stream Order vector from a flow accumulation raster of a river network. I only find solutions with an elevation or direction raster. Can I do this with GRASS?",
"role": "user"
},
{
"message": "Have a look at the GRASS addon <code>r.stream.order</code>. You ... | Stream order from flow accumulation raster | gis | 2017-09-25T16:36:00.407 |
[
{
"message": "I have a line segment AB made up of two LatLngs, A and B.I have another LatLng C and a bearing x degrees.How can I calculate the point D where a line from C with bearing x degrees meets the line segment AB, if at all it meets?All the lines and line segments are geodesic and are not straight.<a hre... | Finding point of intersection between: a line segment of two LatLngs, and a line with initial point and bearing | gis | 2017-09-25T18:34:13.387 |
[
{
"message": "I am using spatialite and it does not contains the method ST_dumppoints and ST_dump. I want to divide several linestring into smaller parts. I also have points that I combined and that resulted in a linestrings. Now I want to divide these linestring into several parts. I have tried using ST_line_s... | Breaking the line into small segments | gis | 2017-09-26T12:00:53.597 |
[
{
"message": "I made a model with which I would like to process various shapefiles that have different fields. I built it using a test shapefile that had its own fields. When I try running another shapefile through it, I get wrong field mappings. Is there a way to set my field mappings as a variable so that the... | Making model in ModelBuilder output fields based on user input shapefile and not shapefile used to build model? | gis | 2017-09-26T14:24:13.093 |
[
{
"message": "I currently looking forward to process LiDAR point clouds (forest data) using Quick Terrain Modeler (QTM), but is it possible to create Canopy Height Model directly using the software?",
"role": "user"
},
{
"message": "To obtain a Canopy Height Model (CHM), subtract the DEM from a DSM ... | Generating Canopy Height Model (CHM) with Quick Terrain Modeler? | gis | 2017-09-26T18:05:59.833 |
[
{
"message": "I have a set of point features which have been snapped to a waterways polyline feature class. I need to select the waterways where they are within 6km upstream or downstream of any given point and create a new feature class from this selection. I do only have a basic licence on ArcMap 10.3. I've l... | Tracing Along Line From A Point | gis | 2017-09-26T18:06:53.590 |
[
{
"message": "Suppose that we have a web application that is showing a basemap. We want to allow users to upload their raster file into the server and server shows the new added raster file automatically after upload is done. Is it possible? If yes, which OGC standard protocol should I use (WMS, WFS, WCS)?",
... | Allow web user to add a new raster layer to the OWS service | gis | 2017-09-27T11:05:57.997 |
[
{
"message": "I need to change symbol size of a categorised shapefile.For this I tried using the Size Assistant(in the style menu: right click > change size > Data defined override > Size assistant)<a href=\"https://i.stack.imgur.com/3VuTh.png\" rel=\"nofollow noreferrer\">However my 30.000 attributes have a ve... | Changing symbol size using the "Size assistant" in QGIS? | gis | 2017-09-27T15:35:48.977 |
[
{
"message": "Leaflet js beginner following/adapting the choropleth <a href=\"http://leafletjs.com/examples/choropleth/\" rel=\"nofollow noreferrer\">example. I need to get something like this <a href=\"https://www.mapbox.com/bites/00250/\" rel=\"nofollow noreferrer\">mapbox map where the feature styles change ... | Leflet js style geojson layer according to zoom level | gis | 2017-09-27T19:47:49.417 |
[
{
"message": "I have a poly line layer where each feature has a Geometric Length and numerical ID. Some of these IDs are duplicates. I would like to be able to select the longest line from each set of duplicates to create a new layer with just the unique IDs.",
"role": "user"
},
{
"message": "QGIS 2... | Selecting the largest from sets of duplicates in QGIS | gis | 2017-09-28T04:45:44.957 |
[
{
"message": "I have data from different countries (=polygons) from 1990 to 2012 and depending on the data value I want to map the changes with a timeline enabling the user to visualize the changes (with colors) from 1990 all the way to 2012.I am using leaflet for the first time, so a little more detailed answe... | Change the colors of polygons on a choropleth map with leaflet | gis | 2017-09-28T12:04:02.710 |
[
{
"message": "I am looking for a way to gather the political areas (ie FIPS codes) from a latitude and longitude coordinate.For example, if I were to input the coordinates: <code>47.66955, -122.31259</code> (Downtown Seattle), I would expect to get the following FIPS codes:<blockquote> Place (aka \"City\"): ... | Finding State, County, Place, and Census Block FIPS codes from a coordinate (latitude and longitude) | gis | 2017-09-28T18:35:25.200 |
[
{
"message": "I'm trying to query the US Census 2015 5 year ACS API for certain variables at the block group level, but unfortunately not all variables/tables are reported at the block group level. How can I find out what geographies a particular variable or table is reported at? I've looked all over and can'... | Finding out what geographies ACS 2015 5 year variables are reported at for use with Census API? | gis | 2017-09-28T21:30:11.710 |
[
{
"message": "I'm simply trying to programmatically change the background colour of a Dataframe in ArcMap.I followed the beginning of <a href=\"https://gis.stackexchange.com/questions/178532/use-python-to-disable-scale-map-elements-proportionally-to-changes-in-page-size\">this solution to access ArcObjects in P... | Using Python comtypes and ArcObjects to change dataframe background color in ArcMap? | gis | 2017-09-28T21:34:49.620 |
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