Top new questions this week:
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I’m working with a very large dataset and I need to calculate the shortest distance between a single point and the closest edge from multiple polygons. I need to use PostGIS because such a task with a …
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I have a point feature layer with some attributes. The numeric value of each attribute stands for the number of items of that attribute related to each point. Is it possible in QGIS to display a …
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I am trying to figure out how to have an expression populate the x,y and possibly Z coords to a point when I create the point in the Field via Qfield. I know how to extract that information after the …
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I’m trying to apply Tobler’s hiking function on QGIS using this formula: (your_res / 1000) / (6 * 2.71828 ^ (-3.5 * abs ( Tan ( ( your_slope* 3.14159)/180) + .05))) My DEM’s resolution is 30m, and I …
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I have a table parcel with the fields parcel_id, parcel_polyid and parcel_owner. Further, I have a table polygons with the fields polyid and shape the latter being of type geometry. I want to select …
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I calculated intersection between Layer 1 and Layer 2 using expression below: area( intersection ( $geometry, collect_geometries( overlay_intersects (‘layer1’,$…
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Imagine you are given a EPSG:abcd crs code, and would like to know the properties of that crs, i.e. you want to know whether it is area-, distance-, scale-preserving etc. Are there tools (ideally in R)…
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Greatest hits from previous weeks:
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I’m having problems creating new shapefiles – in QGIS 2.14.20 any new fields I create and any associated data are not saved. I’ve now got the same problem in QGIS 3.0, but there I get a message …
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When searching Google Maps for a city, the city’s administrative boundary is displayed. Is there a way to get the polygon boundaries of City in a JSON format using google maps api?
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I am listing some of the acronyms used in our work and had to stop to think about whether to list these together or separately: DEM: Digital Elevation Model DSM: Digital Surface Model DTM: Digital …
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I just downloaded QGIS 2.0 and every time I open it I get this error message window popping up: Does anyone know what this means or how I might be able to fix it?
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When writing papers, is there a standard style that should be used for citing ArcGIS, specifically ArcMap? In particular, how do you reference a specific tool that you used in your analysis. I’m not …
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This seems like a simple enough question, but I can’t figure out how to convert a Pandas DataFrame to a GeoDataFrame for a spatial join? Here is an example of what my data looks like using df.head(): …
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I updated QGIS to version 3.6 using OSGEO4w When I try to run any GRASS script, I get the following error message : This algorithm cannot be run 🙁 The specified GRASS 7 folder “C:\OSGEO4~1\…
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Can you answer these questions?
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I have a dataframe that contains X & Y co-ordinates. Some of these coordinates are outside my country of interest, India. I’m looking for a way to filter out all the coordinates outside the …
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I have a postgres database with OSM data imported in it using osmosis. The import process created a ways table that has the following columns: id | version | user_id | tstamp | changeset_id | tags | …
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When using ArcMap it’s possible to convert labels to annotations. How does this work in QGIS without a plugin or Python?
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