No areas of sufficient density - no shapes. Decrease density or area size

[geographika]

I have built the hexer project on Windows, using GDAL 3.04. The help command works fine, however I've not yet been successful in getting any valid outputs.

curse boundary points.shp --output myboundary.shp produces an empty shapefile with no records.

curse density points.shp --output D:\Temp\myhexagons.shp --edge 100 always ends up returning the following error:

No areas of sufficient density - no shapes. Decrease density or area size

I've played around with the --edge and --count settings, and also run the command on various point shapefiles, and LAS files, including a point shapefile generated with the make_shapes.py script.

Is anyone able to get outputs with recent versions of GDAL, or on Windows? Or maybe I've missed a something basic..

[abellgithub]

Does your input shape file consist of points?

…

On Wed, Oct 12, 2022, 1:07 PM Seth G ***@***.***> wrote: I have built the hexer project on Windows, using GDAL 3.04. The help command works fine, however I've not yet been successful in getting any valid outputs. curse boundary points.shp --output myboundary.shp produces an empty shapefile with no records. curse density points.shp --output D:\Temp\myhexagons.shp --edge 100 always ends up returning the following error: No areas of sufficient density - no shapes. Decrease density or area size I've played around with the --edge and --count settings, and also run the command on various point shapefiles, and LAS files, including a point shapefile generated with the make_shapes.py script. Is anyone able to get outputs with recent versions of GDAL, or on Windows? Or maybe I've missed a something basic.. — Reply to this email directly, view it on GitHub <#26>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAKBMMHDP7CB7HFDVZTAQC3WC3V35ANCNFSM6AAAAAARDPQSF4> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[hobu]

Something must have rotted. This code hasn't been used in this form for quite a while.

[hobu]

This has really rotted. I took a stab at it and couldn't get it working in 15 minutes of futzing. I would try to use PDAL directly to do this nowadays, as that's where this code has migrated to.

• Write out a text file
• Read the text file with readers.text
• Run pdal boundary or pdal tindex on it.

[geographika]

Does your input shape file consist of points?

Yes, I tried a shapefile generated from a LAS file, a Python generated one, and a couple more point shapefiles I had to hand all with the same result. I also tried converting to web mercator in case that was an issue (and as used at https://gist.github.com/tmcw/7436261).

This has really rotted. I took a stab at it and couldn't get it working in 15 minutes of futzing. I would try to use PDAL directly to do this nowadays, as that's where this code has migrated to.

* Write out a text file

* Read the text file with `readers.text`

* Run `pdal boundary` or `pdal tindex` on it.

Thanks @hobu for investigating and the reply. As far as I can tell the boundary function has moved to PDAL, but there is no equivalent of the density function for creating the hexagon outputs - is this correct?

A shame this project is now deprecated - the hexer, curse names are inspired!

[geographika]

Ignore comment above, the hexagons are available as described at https://pdal.io/en/stable/workshop/exercises/analysis/density/density.html

pdal density test.las -o test.shp