Every type of point data (tuple of lists, list of tuples, array, geodataframe, etc) could be converted consistently into a geodataframe of only points that could fit into a PointCloud() subclass of Vector?

It could be the default input/output of:

• Raster.to_points(),
• Raster.interp_points(),
• Raster.value_at_coords(),
• etc...

And serve to have an ElevationPointCloud class in xDEM: GlacioHack/xdem#463