I have a MultiLineStringZM layer in a sqlite database, and I'm trying to visualize the measures or m-values at the vertexes. I've tried looking up information on how to do this in QGIS, and about all I've been able to gather is that this is not possible directly from the linestring layer and that the points need to be extracted to a separate layer.
Geometry Tools -->
Extract nodes to create a multipoint layer representing the vertexes of my multlinestring layer, but the process loses the m-values of the vertexes. I need the m-values preserved by either saving the m-value as an attribute of the point, or something else?
Internally we have a command line tool that converts linestrings to a point shapefile with the m-values stored as an attribute on each point, and I've used that to verify that there are m-values assigned to the vertexes, and I could use that if I have to, but if possible it would be nice if this could be done directly inside of QGIS.
EDIT - Repeating what I've said above, but re-emphasizing the fact that we do have a command line tool that can achieve the results that I'm looking for that uses the GDAL libraries, so a solution showing just a partial answer in PyQGIS is not the answer I'm looking for. I'm looking for a built in tool, a plugin ready made for QGIS, or a complete script that can extract (not create/generate) and visualize m-values from a MultiLineStringZM or LineStringZM geometry.