def tile_from_ms(mapName,zoom,x,y):
""" Draw a tile on request using MapServer, store in DB.
Example:
>>> t = tile_from_ms('stlhom',0,0,0)
>>> t.key_name
't:stlhom:0+0+0'
>>> import models
>>> t2 = models.Tile.get_by_key_name(t.key_name)
>>> t2.key_name == t.key_name
True
>>> t2.typ
'D'
>>> t2.dat == t.dat
True
"""
from dynTileMapper.dtm_wsgi.models import Tile
tid = 't:%s:%d+%d+%d'%(mapName,zoom,x,y)
tile = Tile(tid)
mapfile = os.path.join(MAP_FILE_HOME,mapName,'dtm.map')
img = StringIO(tiler.Tiler(mapfile).gTileDraw(x,y,zoom))
typ,dat = optTile(png.PNG(img),False)
tile.typ = typ
tile.dat = dat
tile.put()
return tile
def raw_tile(self, x, y, z, border=True):
left, top, right, bottom = self.gTileBounds(z)
if not (left <= x and x <= right and top <= y and y <= bottom):
return "A", "\x00"
mp = self.map_path
if mp:
img = StringIO(Tiler(mp).gTileDraw(x, y, z, border))
typ, dat = optTile(png.PNG(img), False)
return typ, dat
return None, None