source: genesis/tools/rdnap.py@ 8682

Last change on this file since 8682 was 8622, checked in by rick, 14 years ago
  • Haasje over tussen verschillende functies in files om ze op de juiste locatie te zetten.
  • staticDNS.yaml is makkelijker te parsen en better te lezen
File size: 1.3 KB
Line 
1CACHE_FILE = '/tmp/rd2etrs.yaml'
2coordinates = None
3
4def etrs2rd(lam, phi):
5 """ Convert etrs to rd """
6
7 item['lam'] = lam
8 item['phi'] = phi
9 item['func'] = 'etrs2rd'
10 url = 'http://vanderzwet.net/rdnap/%(func)s/%(xrd)s/%(yrd)s/0/' % item
11
12 f = urllib.urlopen(url)
13 raw = f.read()
14
15 rdnap_x,rdnap_y,rdnap_h = raw.split('/')
16 return (rdnap_x, rdnap_y)
17
18
19
20def rd2etrs(xrd, yrd, hnap=0.0):
21 """
22 Convert rd to etrs
23 JavaScript Version: https://rdinfo.kadaster.nl/rd/transformator.html
24 """
25 # Get cache is exists
26 global coordinates
27 if coordinates == None:
28 try:
29 coordinates = get_yaml(CACHE_FILE)
30 except (IOError,AttributeError):
31 coordinates = dict()
32 pass
33
34 # Check if item in cache
35 xrd = float(str(xrd))
36 yrd = float(str(yrd))
37 if coordinates.has_key((xrd, yrd)):
38 return coordinates[(xrd, yrd)]
39
40 # Get new coordinate
41 item = dict()
42 item['xrd'] = xrd
43 item['yrd'] = yrd
44 item['hnap'] = hnap
45 item['func'] = 'rd2etrs'
46 url = 'http://vanderzwet.net/rdnap/%(func)s/%(xrd)s/%(yrd)s/%(hnap)s/' % item
47 print "### Not in Cache, Fetching coordinate %s, %s from %s" % (xrd, yrd, url)
48 f = urllib.urlopen(url)
49 raw = f.read()
50
51 lam,phi,h = raw.split('/')
52 coordinates[(xrd, yrd)] = (lam, phi)
53 write_yaml(CACHE_FILE, coordinates)
54 return (lam, phi)
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