Reminder about 'richdem'

[michaeldorman]

• 1. To look for GDAL-based alternative to 'richdem' in https://py.geocompx.org/03-spatial-operations#sec-focal-operations
• 2. Implement the same solution for https://py.geocompx.org/05-raster-vector#raster-to-contours (?)

[michaeldorman]

1. To look for GDAL-based alternative to 'richdem' in https://py.geocompx.org/03-spatial-operations#sec-focal-operations
2. Implement the same solution for https://py.geocompx.org/05-raster-vector#raster-to-contours (?) - Done

[Robinlovelace]

Great work Michael. In the meantime, I will explore other ways to install it in our image..

[Robinlovelace]

I tried

run -it ghcr.io/geocompx/docker:python /bin/bash                                                                                      

Resulting in following error:

10/07/2023 09:27:00 pm
root@4c64d4844f2a:/# pip install richdem
Collecting richdem
  Downloading richdem-0.3.4.tar.gz (329 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 329.4/329.4 kB 3.5 MB/s eta 0:00:00
  Preparing metadata (setup.py) ... done
Requirement already satisfied: numpy<2,>=1.7 in /usr/local/lib/python3.11/site-packages (from richdem) (1.24.0)
Building wheels for collected packages: richdem
  Building wheel for richdem (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [22 lines of output]
      Using RichDEM hash=Unknown, time=Unknown
      /usr/local/lib/python3.11/site-packages/setuptools/dist.py:771: UserWarning: Usage of dash-separated 'description-file' will not be supported in future versions. Please use the underscore name 'description_file' instead
        warnings.warn(
      running bdist_wheel
      running build
      running build_py
      creating build
      creating build/lib.linux-x86_64-cpython-311
      creating build/lib.linux-x86_64-cpython-311/richdem
      copying richdem/__init__.py -> build/lib.linux-x86_64-cpython-311/richdem
      copying richdem/cli.py -> build/lib.linux-x86_64-cpython-311/richdem
      running build_ext
      COMPILER unix
      COMPILER ARGUMENTS ['-std=c++11', '-g', '-fvisibility=hidden', '-O3', '-Wno-unknown-pragmas']
      building '_richdem' extension
      creating build/temp.linux-x86_64-cpython-311
      creating build/temp.linux-x86_64-cpython-311/lib
      creating build/temp.linux-x86_64-cpython-311/lib/richdem
      creating build/temp.linux-x86_64-cpython-311/lib/richdem/common
      creating build/temp.linux-x86_64-cpython-311/src
      gcc -pthread -Wsign-compare -DNDEBUG -g -fwrapv -O3 -Wall -fPIC -DDOCTEST_CONFIG_DISABLE -DRICHDEM_COMPILE_TIME=\"\\\"Unknown\\\"\" -DRICHDEM_GIT_HASH=\"\\\"Unknown\\\"\" -DRICHDEM_LOGGING -D_USE_MATH_DEFINES -Ilib/ -I/usr/local/include/python3.11 -c lib/richdem/common/random.cpp -o build/temp.linux-x86_64-cpython-311/lib/richdem/common/random.o -std=c++11 -g -fvisibility=hidden -O3 -Wno-unknown-pragmas
      error: command 'gcc' failed: No such file or directory
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for richdem
  Running setup.py clean for richdem
Failed to build richdem
ERROR: Could not build wheels for richdem, which is required to install pyproject.toml-based projects

[Robinlovelace]

As documented in comments here, I still can find no way to install it: r-barnes/richdem#65

Was hoping it would be fixed upstream but not sure it will be now..

[Robinlovelace]

I think it can be done with ndimage, maybe: https://britishgeologicalsurvey.github.io/data%20analytics/geospatial%20analysis/moving_window_functions/

[Robinlovelace]

I think xarray functions are strong here, e.g. https://xarray-spatial.org/user_guide/surface.html

I've tried that in #192 but it's not working for some reason.