4 votes

Is the PostGIS st_intersection function viable for very large data-sets?

I really wouldn't use PostGIS for datasets in the millions if you have access to a columnar database. If you regularly query tables with millions of rows, it's more efficient to script a workflow ...
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  • 2,769
4 votes

Creating shapefile showing footprints of Rasters?

Ensure images have defined nodata. If source images do not, fix with something like one of the below, where 0 or 255 is the supposed-to-be nodata value: gdal_translate ... -a_nodata 0 ... outimage.vrt ...
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  • 27.5k
3 votes
Accepted

Renaming multiple feature layers for multiple MXDs using ArcPy

List the mxd:s using os.walk. I have not tried this with your code, test it on one mxd copy first. This will list all mxd files in mxdfolder, including any subfolders: import os, arcpy mxdfolder = r'...
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  • 52.1k
2 votes

Math functions in ArcMap field calculator

This is quite similar to this question, and either field calculator or update cursor logic can be employed. If you insist using Field Calculator, as Vince mentioned, it may cause grief in the long run....
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  • 4,806
2 votes

Merging attribute features based on matching field

Dissolve your features. Your original parcel data is the input, and use 'parcelnumb' as the dissolve field. Make sure multipart features are allowed (this is the default).
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  • 2,084
1 vote

Getting start 3 word (string) from field using ArcMap

You're better off using python, VBScript is not supported in ArcGIS Pro so no point learning it as ArcMap is on the way out. Expression: myfunc(!Title_FLNA!) In the code block: def myfunc(value): ...
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  • 52.6k
1 vote

Modelling elevation in 3D link-network for sDNA in ArcMap

I think the easiest way forward is to fix the terrain model. What would you prefer to happen to links that are not within the surface extent - assign them an elevation of zero? You could create a ...
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  • 2,163
1 vote

Errors when running python gdal.grid with basic parameters

You can solve this issue by assigning gdal.Grid() to a variable, like output = gdal.Grid() and then immediately assign that variable to 'None', so after you run your model, output = None. It's ...
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  • 11
1 vote

Displaying "World From Space" projection pole-to-pole?

If you're using ArcPro go into the Coordinate Systems Properties. Right-click on the "World from Space" projection and choose Copy and Modify. Enter your own Latitude and Longitude of ...
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