| 1 | ###############################################################################
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| 2 | #Management command to generate tiles using gheat.
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| 3 | #
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| 4 | #Must be given a bounding box by using options -s and -e (start and end)
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| 5 | #
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| 6 | #Example usage:
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| 7 | #>>> python manage.py generate_tiles -s 60,6 -e 66,8 -c firetrans -v serve_tile
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| 8 | #
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| 9 | #Requires the globalmaptiles.py file. Get it from
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| 10 | #http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/globalmaptiles.py
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| 11 | #
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| 12 | #Note: This command will NOT create tiles if they are empty. In order to do so, change
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| 13 | #the gheat generate_tile view so that it creates empty tiles for each request given
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| 14 | #x and y and zoom. This way you wan't have "holes" in the tile overlay if using
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| 15 | #the static tiles instead of the usual django url/view.
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| 16 | #
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| 17 | #Author: Dennis Wagenaar
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| 18 | #
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| 19 | #Original Author: Anders Eriksen
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| 20 | #https://github.com/robertrv/django-gheat/issues/1
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| 21 | #
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| 22 | ###############################################################################
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| 23 |
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| 24 | from django.core.management.base import BaseCommand
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| 25 | from optparse import OptionParser, make_option
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| 26 | from django.core.urlresolvers import reverse
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| 27 | from django.test.client import Client
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| 28 | import math
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| 29 |
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| 30 | class LatLonToTile:
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| 31 |
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| 32 | def deg2num(self, lat_deg, lon_deg, zoom):
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| 33 | lat_rad = math.radians(lat_deg)
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| 34 | n = 2.0 ** zoom
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| 35 | xtile = int((lon_deg + 180.0) / 360.0 * n)
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| 36 | ytile = int((1.0 - math.log(math.tan(lat_rad) + (1 / math.cos(lat_rad))) / math.pi) / 2.0 * n)
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| 37 | return(xtile, ytile)
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| 38 |
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| 39 |
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| 40 | class Command(BaseCommand):
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| 41 |
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| 42 | option_list = BaseCommand.option_list + (
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| 43 | make_option("-b", "--tileview", dest="viewname", default="serve_tile"),
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| 44 | make_option("-s", "--start", dest="start", default="52.132708,4.437389"),
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| 45 | make_option("-e", "--end", dest="end", default="52.178837,4.551029"),
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| 46 | make_option("-c", "--colorscheme", dest="color", default="classic"),
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| 47 | )
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| 48 |
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| 49 | def handle(self, *args, **options):
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| 50 |
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| 51 | start = options['start'].split(',')
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| 52 | end = options['end'].split(',')
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| 53 | viewname = options['viewname']
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| 54 | colorscheme = str(options['color'])
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| 55 |
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| 56 | d2n = LatLonToTile()
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| 57 |
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| 58 | #initialize browser client
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| 59 | c = Client()
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| 60 |
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| 61 | for tz in range(1, 17):
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| 62 | #calculate start tiles
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| 63 | mxmin, mymax = d2n.deg2num(float(start[0]), float(start[1]), tz)
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| 64 |
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| 65 | #calculate end tiles
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| 66 | mxmax, mymin = d2n.deg2num(float(end[0]), float(end[1]), tz)
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| 67 |
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| 68 | #loop through each tile and generate a request to the serve_tile view using Client
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| 69 | for ty in range(mymin, mymax+1):
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| 70 | for tx in range(mxmin, mxmax+1):
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| 71 |
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| 72 | tileurl = reverse(viewname, kwargs={'color_scheme': colorscheme, 'zoom':tz, 'x':tx, 'y':ty})
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| 73 |
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| 74 | generate_response = c.get(tileurl)
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| 75 |
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| 76 | #lousy error handling. Should check why status 200 not returned... I.e. wrong colorscheme
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| 77 | if generate_response.status_code == 200:
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| 78 | print "Generated tile " + tileurl
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| 79 | else:
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| 80 | print "Failed generating tile " + tileurl
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| 81 |
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