Hi,
I’ve been struggling to plot a marker (a singe point) on a PPI plot, without success.
The plot is georreferenced (WGS84) and already has shapefiles plotted using wradlib.vis.add_lines() on it.
The X,Y/lon,lat coordinates of the point are given as a list.
Solved by creating a polygon shapefile of the point: using QGIS, insert the point layer from a csv file, buffer the point to a visible area, export the buffered area as a polygon layer; plot this exported polygon shapefile on your PPI plot using wradlib.vis.add_patches().