All Questions

Because of the pandemic my work is strictly remote. I remote into my work computer via laptop. I have two monitors connected to that laptop. Sometimes when I move the arcmap desktop program from one ...

I am having trouble trying to answer this question: list 5 key data issues to be considered when outsourcing GIS data from the internet, describes the process that you would use to address each of the ...

Landsat 8 Collection 1 Tier 1 8-Day EVI Composite. I continued with the starting codes given by Google Earth Engine. I tried to solve my work by adding code to the rest of these codes. However, it ...

I would like to run this code for importing 3 different rasters at every loop and do the calculation between them, but the code doesn't work (the writing "invalid layer, GDAL provider cannot open ...

I started with a raster layer, then reclassified it using r.reclass. I thinned using r.thin (took ages- big file?), then tried r.to.vect and I'm still getting an error message telling me I need to use ...

I have a table of contig ID's and their associated DNA sequence and I would like to turn that into amino acid sequences using the translate function from Biostrings. I keep getting error messages when ...

I have to config several project files with many layers in each one, many of those layers have similar fields which should have the same forms configs. Is there a way to config forms attributes to ...

The following PostGIS query involving ST_Relate gives FFFFFF102 as its result: SELECT ST_Relate( ST_GeomFromText('POLYGON EMPTY'), ST_GeomFromText('MULTILINESTRING((0 0,0 1),(0 1,1 1,1 0,0 0))'), ...

I have a directory called /home/john/WAMI/WPAFB_TRAIN/ with .txt files that have names like: 20091021202517-01000100-VIS.ntf.r0 20091021202517-01000101-VIS.ntf.r0 I know that the code needs to say ...

I'm writing code with GDAL in Python. I'm trying to find the area of a geom in WGS84 with GDAL. I tried projecting it to UTM and then getting the area of the projection, but the answer isn't what I ...

I'd like to make ocean drainage map like this: In particular I'm interested in Russia. A relatively explicit data source is hydrosheds.org, however from there i can get data to display only endorheic ...

In QGIS 3.16.0 I have a postgis-polygon-layer with a field "array_polygon" which contains an array. When digitizing a postgis-point-layer-point I would like to use the different array-values ...

I was trying to import fuzzywuzzy but I was getting a module not found error.

I'm using the below code to create NO2(Sentinel-5p) time series charts for my region of interest by mean reduction. However, upon charting, I get an error message Error generating chart: No features ...

I have successfully implemented OSM maps and now looking to do the same with the HERE service for aerial imagery. From the research I have done it looks like the main issue is the Y axis being ...

I have a simple GIS problem I was not able to find the solution on the internet. My aim is quite simple: I have a polygons layer that contains several entities, and I would like to compute a new layer ...

I’m facing a spatial autocorrelation problem and I want to calculate the «  autocov» covariate through the function autocov_dist from spdep package. The problem is when I defined the neighborhood ...

I have a pgRouting network graph of ~ 1 mio edges and ~ 0.4 mio vertices. I want to find out something like "nearest facility" for bigger subsets. E.g. i have a bigger number of source ...

I can change the colour for selected items fine. I have even figured out how to change the colour of the preview when moving a vertex. How can I change the colour of the highlight when hovering over a ...

I have a set of points spaced at 125m intervals across an area, an average depth value is assigned to each point. I need to calculate from these points a single average depth value for a 250m square, ...

I am trying to use PyQGIS to convert a Fill Symbol Layer into a geometry generator Symbol Layer in a rule-based renderer with 300 rules. I am able to iterate over the rules and return each rule's ...

I would like to save x,y,z values for polygon vertices as a geoJSON file using Python in QGIS. I've made several attempts, but all have issues. I've found that the QgsPoint object must be used as ...

I'm using the below code to create NO2(Sentinel-5p) time series charts for my region of interest by mean reduction. However, upon charting, I get an error message Error generating chart: No features ...

I'm using ArcMap with the Basic license. I have turnout gates (points) on or very close to irrigation facilities (lines). The irrigation facilities have a field for type (canal, pipeline, culvert, etc....

org.geotools.jdbc.JDBCDataStore stores a shapefile in a PostgreSQL database as a geometry(MultiPolygon). I am trying to use PostGIS functions such as ST_Contains on the geometry(MultiPolygon) but it ...

I'm looking for a way to aborpt a script execution if a sql query returns some results. I've found a few solutions on the forum but all of them lead to shutting down QGIS (thing I precisely want to ...

I am developing a plugin in QGIS using Python language. This plugin uses algorithms from Processing Toolbox and I save some results in the temporary folder assigning "QgsProcessing....

Looking for an algorithm (python, formulas, whatever...) to georeference a single drone image based on its EXIF data. Specifically, I need to translate drone GPS latitude and longitude (after ...

Im am trying to convert a radar file provided in HDF5 to a GeoTIFF using gdal.Translate() in my Python script. An example of the HDF5 file can be downloaded here I have already managed to get it ...

I am new to GIS. I am currently working on a problem which involves two vector datasets about habitat and land use ("now" and "future"). I need to generate metrics like "...

I have placed 2 widgets (baseMapGallery, LayerList) inside a small map in a rather large popup. To keep it from crowding out the view, I am trying to use an Expand to launch it from a small icon ...

I am trying to do an update posting on Postman for the first using PostGIS / Geography file type and I don't know where I am going wrong. I have included the model below of the table in pgamdin 4 / ...

I am writing a plugin that listens to editing events, such as the QgsVectorLayer.editingStarted, QgsVectorLayer.geometryChanged signals. So far all is fine but there are also some validation rules ...

I'm trying to build a script that uses select by attribute and select by location to do some operations on a couple of shapefiles containing a large amount of points and polygons. Preferably, I want ...

There are lots of questions on GIS SE about importing ArcPy but I can't find a set of instructions that work for me. I know very little about paths and environments, so don't understand most of the ...

I want to show oneway directions of streets using SLD in geoserver. I follow this instruction but i still have a problem with directions of arrows. Most of all arrows get south to north and west to ...

I got myself a rasterstack with 6300 layers - which represent 70 winterseasons since 1950 till 2019 (70x90 days). Values range from 0.5 to 1.5 and I am looking for amount of runs of at least 5 days ...

I am exporting some tables from PostGIS to a geopackage. My command to do is task is as follows ogr2ogr -append -f GPKG E:\workspace\test.gpkg PG:service=XXXX -where app_einzugsgebiet.hauptgemeinde=...

I'm using the source code RCMEMS (https://github.com/markpayneatwork/RCMEMS) to download several marines variables and I have a error despite having respect syntax package. To biginning, according to ...

I am playing around with the options for Leaflet-Draw and have came up wit a little annoyance. Using a colorpicker I can set the color for every new polyline I draw by invoking options.draw.polyline....

I'd be super grateful for any pointer to some resource, or any other kind of help. I want to make a GetCoverage-request against a server and download more or less 24 GB of data. In R I would do ...

I'm interested to find regions in some DEM data for Earth that are what I call geodesically flat, i.e. flat in the way that the path light travels is flat in the absence of strong gravitational fields....

I'm tasked to create a simple catalogue of 2000+ geopackages, and hope there is a way to do that with QGIS. The idea is to batch run over all these geopackages and write the following to a CSV file; ...

I user Openlayers 6. I want to create an arc line in OpenLayers that connects one coordinate to another. I have a case where when the distance between the points is too short, the line doesn't curve. ...

I want to add a WFS 2.0 layer to my QGIS 3.16 and I have a bounding box issue: QGIS sends a bounding box in the same CRS than the layer CRS. But the server expects the bounding box to be in WGS84, ...

I'm having a problem with visualizing a WFS layer in Openlayers. I can see I get the response, but nothing shows up on my map. I tried more potential solutions from stackexchange, but couldn't get it ...

Following is my UI for map. Red is default pin I have selected. using showMarker and showPopup custom function. which are using viewMap.graphics.add and popup.open methods internally. There's a ...

I'm comparing several maps of one area (made by different people) to each other, and used intersection to find how much of specific selected features (polygons) overlapped. I soon realised that the ...

I was able to run my application on using Legend earlier but now I want to update my Legend when scrolling on the map. So I tried to used this code GetLegendGraphic and getLegendUrl function filter by ...

I'm trying to resolve the inability to load a raster MBTiles map on a GPS that added support for the format. Maps created using QGIS or CalTopo will work. The SQLite database only contains two tables-...