1 #!/usr/bin/python
   2 
   3 # created by Radek Podgorny <radek@podgorny.cz>
   4 # version 1.1
   5 
   6 # If you find this program useful, send me email or postcard to:
   7 # Radek Podgorny
   8 # Nad Kolonii 29
   9 # Praha 4
  10 # 140 00
  11 # Czech Republic
  12 
  13 
  14 import sys
  15 import os
  16 import time
  17 import subprocess
  18 import random
  19 
  20 
  21 def sig(i):
  22 	if i < 0: return -1
  23 	elif i > 0: return 1
  24 	else: return i
  25 
  26 
  27 if len(sys.argv) < 7:
  28 	print "You have to specify: slat slon tlat tlon scale tag [--download] [--overwrite] [--writetofile]"
  29 	sys.exit(0)
  30 
  31 
  32 #slat = 49.9389
  33 #slon = 14.2170
  34 #tlat = 50.1825
  35 #tlon = 14.7129
  36 #scale = 3950
  37 #tag = "praha"
  38 
  39 print sys.argv
  40 slat = float(sys.argv[1])
  41 slon = float(sys.argv[2])
  42 tlat = float(sys.argv[3])
  43 tlon = float(sys.argv[4])
  44 scale = int(sys.argv[5])
  45 tag = sys.argv[6]
  46 
  47 download = False
  48 if "--download" in sys.argv[6:]: download = True
  49 
  50 overwrite = False
  51 if "--overwrite" in sys.argv[6:]: overwrite = True
  52 
  53 writetofile = False
  54 if "--writetofile" in sys.argv[6:]: writetofile = True
  55 
  56 
  57 scales = (3950, 3950*3, 3950*6, 3950*12, 3950*25, 3950*50, 3950*150, 3950*800, 3950*2000, 3950*7000, 3950*12000)
  58 
  59 if scale not in scales:
  60 	print "Invalid scale"
  61 	print "Available scales are: ", scales
  62 	sys.exit(0)
  63 	
  64 alt = scale / scales[0]
  65 
  66 # swap coordinates if needed
  67 if slat > tlat:
  68 	tmp = tlat
  69 	tlat = slat
  70 	slat = tmp
  71 
  72 if slon > tlon:
  73 	tmp = tlon
  74 	tlon = slon
  75 	slon = tmp
  76 
  77 # these values are stolen and adjusted to work best for me -- Radek Podgorny
  78 k = scale * 0.0000028
  79 klat = k * 0.8
  80 klon = k * 1.2
  81 
  82 # find the best stepping
  83 mod = 0.000001
  84 while (klat%mod)/klat < 0.1 and (klon%mod)/klon < 0.1: mod *= 10
  85 mod *= 0.1
  86 
  87 klat -= klat % mod
  88 klon -= klon % mod
  89 
  90 slat -= (abs(slat) % klat) * sig(slat)
  91 slon -= (abs(slon) % klon) * sig(slon)
  92 
  93 
  94 lat = slat
  95 while lat <= tlat+klat:
  96 	lon = slon
  97 	while lon <= tlon+klon:
  98 		filename = "map_expedia--" \
  99 			+ tag \
 100 			+ "--" \
 101 			+ str(scale) \
 102 			+ "--"
 103 
 104 		if lat >= 0: filename += "+%(lat)07.3f" % {"lat":lat}
 105 		else: filename += "%(lat)08.3f" % {"lat":lat}
 106 
 107 		filename += "_"
 108 		if lon >= 0: filename += "+%(lon)07.3f" % {"lon":lon}
 109 		else: filename += "%(lon)08.3f" % {"lon":lon}
 110 
 111 		filename += ".gif"
 112 
 113 		skipped = False
 114 		if download:
 115 			if overwrite or not os.path.exists(filename):
 116 				url = "http://www.expedia.com/pub/agent.dll?qscr=mrdt&ID=3XNsF." \
 117 					+ "&CenP=" + str(lat) + "," + str(lon) \
 118 					+ "&Lang=EUR0809&Alti=" + str(alt) \
 119 					+ "&Size=1280,1024&Offs=0,0"
 120 
 121 				subprocess.call(["wget", url, "-O", filename])
 122 			else:
 123 				print filename, "already downloaded"
 124 				skipped = True
 125 
 126 		if writetofile:
 127 			print "Writing to file"
 128 			f = open(tag + ".txt", "a")
 129 			f.write(filename + " " + str(lat) + " " + str(lon) + " " + str(scale) + "\n")
 130 			f.close()
 131 
 132 		if download and not skipped:
 133 			sleep = random.randint(1, 20)
 134 			while sleep > 0:
 135 				print sleep
 136 				time.sleep(1)
 137 				sleep -= 1
 138 
 139 		lon += klon
 140 	lat += klat