Filter KML by way type by Tim Sheerman-Chase, 2013 This file may be used under CC0, http://creativecommons.org/publicdomain/zero/1.0/

splitprow.py

#Filter KML by way type
#by Tim Sheerman-Chase, 2013
#This file may be used under CC0, http://creativecommons.org/publicdomain/zero/1.0/

import xml.etree.ElementTree as ET
import sys

def GetMetaData(place):

	out = {}
	for placedat in place:
		if placedat.tag == "{http://www.opengis.net/kml/2.2}ExtendedData":
			for schemaData in placedat:
				if schemaData.tag == "{http://www.opengis.net/kml/2.2}SchemaData":
					for simpledata in schemaData:
						#print simpledata.attrib['name'], simpledata.text
						out[simpledata.attrib['name']] = simpledata.text
	return out

if __name__=="__main__":
	fina = "WestSussex.kml"
	if len(sys.argv) >= 2:
		fina = sys.argv[1]
	
	doc = ET.parse(fina)
	root = doc.getroot()
	ty = "FOOTPATH"
	if len(sys.argv) >= 3:
		ty = sys.argv[2]

	for kml in root:
		for folder in kml:
			cursor = 0
			while cursor < len(folder):	

				place = folder[cursor]
				if place.tag != "{http://www.opengis.net/kml/2.2}Placemark": 
					cursor += 1
					continue

				metadata = GetMetaData(place)
				print place.tag, metadata['PROWCLASS']

				if metadata['PROWCLASS'] != ty:
					del folder[cursor]
				else:
					cursor += 1

	doc.write(ty+".kml", encoding="utf-8")