viz1090/map_conversion/mapconverter.py

from lxml import etree as ElementTree
import numpy as np
import sys

filename = sys.argv[1]

if(len(filename) == 0):
	print "No input filename given"
	exit()

parser = ElementTree.XMLParser(recover=True)
tree = ElementTree.parse(filename, parser)
polys = tree.xpath('//polygon')

bin_file = open("mapdata.bin", "wt")

outlist = []

for p in polys:
	currentPoints = p.attrib['points']
	outlist.extend((currentPoints.replace(","," ") + " 0 0").split())

np.asarray(outlist).astype(np.single).tofile(bin_file)
bin_file.close()