hamburg-hvv-innerorts (based on osm with landuse= commercial|industrial|recreation_ground|residential|retail):
	- shp files defining "innerorts" in two versions:
		a) incl. hamburg city area (all hamburg = residential and id = gml_id) ... as result of merging this file has 5 columns: gml_id; name; areaType; id; landuse
		b) excl. hamburg ... this file has only 2 columns: id; landuse
	- better only use either a) or b)! Attention with the columns and their order!
	- additional buffer to incl. links (0.0003 degrees in qgis buffer feature)

	- "_reduced" shp do not consider "geometry boundaries lengths < 401" to filter out small houses in the nowhere