Processing toolbox: Rasterize vector layer

[mfisher87]

Convert a layer from vector to raster as a processing function. The output raster should be shown as a new layer.

https://gdal.org/en/stable/programs/gdal_rasterize.html

[arjxn-py]

Do you think #528 is covering this while converting a vectorlayer to geotiff?

[mfisher87]

It's close; I was thinking this function should be in the processing toolbox instead of (or in addition to) a download option. So instead of downloading the rasterized vector to the user's computer, it would show up as a new layer in the project!

This way, if we prefer, we could only offer download options of the same time as the source data, i.e. download vector only as vector data. That might be simpler and clearer for the user.

I feel that offering the ability to transform vectors to rasters at download time may be confusing, especially as there's no good way to do the opposite, download a raster as a vector, without knowing what the user wants. Do they want the data to be contourized? Do they want a set of points representing the centroid of each grid cell with the value as an attribute on each point? Maybe something else I haven't thought of? To me those functions all make sense for the processing toolbox, not in the download menu.

[martinRenou]

Makes total sense to me! Let's remove the download of vector layers as geotiff from #528