Native point cloud Processing provider (QEP 263)

[alexbruy]

Description

Add new native Processing provider with point cloud algorithms, as described in qgis/QGIS-Enhancement-Proposals#263. Under the hood provider uses pdal_wrench command line tool.

Currently available algorithms:

• Information: outputs a basic metadata of the point cloud (number of points, extent, crs, etc)
• Convert format: convert point cloud to a different format, e.g. las to laz
• Reproject: reproject point cloud to a different CRS
• Fix projection: fix (assign) CRS of a point cloud file
• Clip: clip point cloud by clipping polygon(s)
• Merge: merge multiple point clouds in a single file
• Tile: create tiles from input data
• Thin: create a thinned version of the point cloud
• Boundary: export vector layer containing point cloud boundaries
• Density: export a raster file where each cell contains number of points that are in that cell's area
• Export to raster: export point cloud data to a 2D raster grid
• Export to vector: export point cloud data to a vector layer with 3D points
• Export to raster (TIN): export point cloud data to a 2D raster grid using a triangulation of points
• Filer: extract subset from the point cloud using PDAL expressions

As pdal_wrench requires PDAL >= 2.5.0, the new processing provider will be available only where the PDAL version requirement is satisfied.

Funded by: Point cloud processing crowdfunding

[github-actions]

@alexbruy
This pull request has been tagged as requiring documentation.

A documentation ticket will be opened at https://github.com/qgis/QGIS-Documentation when this PR is merged.

Please update the description (not the comments) with helpful description and screenshot to help the work from documentors.
Also, any commit having [needs-doc] or [Needs Documentation] in will see its message pushed to the issue, so please be as verbose as you can.

Thank you!

[alexbruy]

clang-tidy check failed because of missed automatically generated file, that file will be generated only when building with PDAL >= 2.5

[wonder-sk]

I have reviewed the code and tested before the PR was created, and with Nyall's comments addressed, we should be good to go!

[github-actions]

@alexbruy
A documentation ticket has been opened at qgis/QGIS-Documentation#8122
It is your responsibility to visit this ticket and add as much detail as possible for the documentation team to correctly document this change.
Thank you!

[qgis-bot]

@alexbruy

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