def polygonFinder(GMLelement):
    polygonsLocal = GMLelement.findall('.//{%s}Polygon' %ns_gml)
    return polygonsLocal
get superimposition based on aligned residue positions.
dataset/ETHPy150Open tudelft3d/CityGML2OBJs/markup3dmodule.py/polygonFinder--crossover with--dataset/ETHPy150Open CGATOxford/cgat/legacy/PdbTools.py/GetSuperImposition