def image_tiles(request, map_path, layer, z, y, x):
try:
mbtiles = os.path.join(maps_root, map_path, '{}.mbtiles'.format(layer))
reader = MBTilesReader(mbtiles)
return response.raw(reader.tile(int(z), int(y), int(x)),
headers={'Content-Type': 'image/png'})
except ExtractionError:
pass
except (InvalidFormatError, sqlite3.OperationalError):
exceptions.abort(404, 'Cannot read tile database')
return response.raw(blank_tile(), headers={'Content-Type': 'image/png'})
def image_tiles(map_id, layer, z, y, x):
try:
mbtiles = os.path.join(settings['FLATMAP_ROOT'], map_id,
'{}.mbtiles'.format(layer))
reader = MBTilesReader(mbtiles)
image_bytes = io.BytesIO(reader.tile(z, x, y))
return send_bytes(image_bytes, 'image/png')
except ExtractionError:
pass
except (InvalidFormatError, sqlite3.OperationalError):
flask.abort(404, 'Cannot read tile database')
return send_bytes(blank_tile(), 'image/png')
def image_tiles(map_path, layer, z, y, x):
try:
mbtiles = os.path.join(root_paths['flatmaps'], map_path,
'{}.mbtiles'.format(layer))
reader = MBTilesReader(mbtiles)
return flask.send_file(io.BytesIO(reader.tile(z, x, y)),
mimetype='image/png')
except ExtractionError:
pass
except (InvalidFormatError, sqlite3.OperationalError):
flask.abort(404, 'Cannot read tile database')
return flask.send_file(blank_tile(), mimetype='image/png')
def vector_tiles(map_path, z, y, x):
try:
mbtiles = os.path.join(root_paths['flatmaps'], map_path,
'index.mbtiles')
reader = MBTilesReader(mbtiles)
return flask.send_file(io.BytesIO(reader.tile(z, x, y)),
mimetype='application/octet-stream')
except ExtractionError:
pass
except (InvalidFormatError, sqlite3.OperationalError):
flask.abort(404, 'Cannot read tile database')
return flask.make_response('', 204)
def vector_tiles(map_path, layer, z, y, x):
try:
mbtiles = os.path.join(maps_root, map_path, 'index.mbtiles')
reader = MBTilesReader(mbtiles)
tile = reader.tile(z, x, y)
headers = {'Content-Type': 'application/x-protobuf'}
if tile[0:2] == b'\x1f\x8b':
headers['Content-Encoding'] = 'gzip'
return response.raw(tile, headers=headers)
except ExtractionError:
pass
except (InvalidFormatError, sqlite3.OperationalError):
exceptions.abort(404, 'Cannot read tile database')
return response.empty(status=204)
def vector_tiles(map_id, z, y, x):
try:
mbtiles = os.path.join(settings['FLATMAP_ROOT'], map_id,
'index.mbtiles')
tile_reader = MBTilesReader(mbtiles)
tile_bytes = tile_reader.tile(z, x, y)
if metadata(tile_reader, 'compressed'):
tile_bytes = gzip.decompress(tile_bytes)
return send_bytes(io.BytesIO(tile_bytes), 'application/octet-stream')
except ExtractionError:
pass
except (InvalidFormatError, sqlite3.OperationalError):
flask.abort(404, 'Cannot read tile database')
return flask.make_response('', 204)
class MBTiles(object):
""" Represent a MBTiles file """
objects = MBTilesManager()
def __init__(self, name, catalog=None):
self.catalog = catalog
self.fullpath = self.objects.fullpath(name, catalog)
self.basename = os.path.basename(self.fullpath)
self._reader = MBTilesReader(self.fullpath, tilesize=app_settings.TILE_SIZE)
@property
def id(self):
iD, ext = os.path.splitext(self.basename)
return iD
@property
def name(self):
return self.metadata.get('name', self.id)
@property
def filesize(self):
return os.path.getsize(self.fullpath)
@reify
def metadata(self):
return self._reader.metadata()
@reify
def bounds(self):
bounds = self.metadata.get('bounds', '').split(',')
if len(bounds) != 4:
logger.warning(_("Invalid bounds metadata in '%s', fallback to whole world.") % self.name)
bounds = [-180,-90,180,90]
return tuple(map(float, bounds))
@reify
def center(self):
"""
Return the center (x,y) of the map at this zoom level.
"""
center = self.metadata.get('center', '').split(',')
if len(center) == 3:
lon, lat, zoom = map(float, center)
zoom = int(zoom)
if zoom not in self.zoomlevels:
logger.warning(_("Invalid zoom level (%s), fallback to middle zoom (%s)") % (zoom, self.middlezoom))
zoom = self.middlezoom
return (lon, lat, zoom)
# Invalid center from metadata, guess center from bounds
lat = self.bounds[1] + (self.bounds[3] - self.bounds[1])/2
lon = self.bounds[0] + (self.bounds[2] - self.bounds[0])/2
return (lon, lat, self.middlezoom)
@property
def minzoom(self):
z = self.metadata.get('minzoom', self.zoomlevels[0])
return int(z)
@property
def maxzoom(self):
z = self.metadata.get('maxzoom', self.zoomlevels[-1])
return int(z)
@property
def middlezoom(self):
return self.zoomlevels[len(self.zoomlevels)/2]
@reify
def zoomlevels(self):
return self._reader.zoomlevels()
def tile(self, z, x, y):
try:
return self._reader.tile(z, x, y)
except ExtractionError:
raise MissingTileError
def center_tile(self):
lon, lat, zoom = self.center
proj = GoogleProjection(app_settings.TILE_SIZE, [zoom])
return proj.tile_at(zoom, (lon, lat))
def grid(self, z, x, y, callback=None):
try:
return self._reader.grid(z, x, y, callback)
except ExtractionError:
raise MissingTileError
def tilejson(self, request):
# Raw metadata
jsonp = dict(self.metadata)
# Post-processed metadata
jsonp.update(**{
"bounds": self.bounds,
"center": self.center,
"minzoom": self.minzoom,
"maxzoom": self.maxzoom,
})
# Additionnal info
try:
kwargs = dict(name=self.id, x='{x}',y='{y}',z='{z}')
if self.catalog:
kwargs['catalog'] = self.catalog
tilepattern = reverse("mbtilesmap:tile", kwargs=kwargs)
gridpattern = reverse("mbtilesmap:grid", kwargs=kwargs)
except NoReverseMatch:
# In case django-mbtiles was not registered in namespace mbtilesmap
tilepattern = reverse("tile", kwargs=dict(name=self.id, x='{x}',y='{y}',z='{z}'))
gridpattern = reverse("grid", kwargs=dict(name=self.id, x='{x}',y='{y}',z='{z}'))
tilepattern = request.build_absolute_uri(tilepattern)
gridpattern = request.build_absolute_uri(gridpattern)
tilepattern = tilepattern.replace('%7B', '{').replace('%7D', '}')
gridpattern = gridpattern.replace('%7B', '{').replace('%7D', '}')
jsonp.update(**{
"tilejson": "2.0.1",
"id": self.id,
"name": self.name,
"scheme": "xyz",
"basename": self.basename,
"filesize": self.filesize,
"tiles": [tilepattern],
"grids": [gridpattern]
})
return json.dumps(jsonp)
class MBTiles(object):
""" Represent a MBTiles file """
objects = MBTilesManager()
def __init__(self, name):
"""
Load a MBTile file.
If `name` is a valid filepath, it will load it.
Else, it will attempt to load it within `settings.MBTILES_ROOT` folder.
"""
mbtiles_file = name
if not os.path.exists(mbtiles_file):
if not os.path.exists(app_settings.MBTILES_ROOT):
raise MBTilesFolderError()
mbtiles_file = os.path.join(app_settings.MBTILES_ROOT, name)
if not os.path.exists(mbtiles_file):
mbtiles_file = "%s.%s" % (mbtiles_file, app_settings.MBTILES_EXT)
if not os.path.exists(mbtiles_file):
raise MBTilesNotFoundError(_("'%s' not found") % mbtiles_file)
self.fullpath = mbtiles_file
self.basename = os.path.basename(self.fullpath)
self._reader = MBTilesReader(self.fullpath, tilesize=app_settings.TILE_SIZE)
@property
def id(self):
iD, ext = os.path.splitext(self.basename)
return iD
@property
def name(self):
return self.metadata.get('name', self.id)
@property
def filesize(self):
return os.path.getsize(self.fullpath)
@reify
def metadata(self):
return self._reader.metadata()
@reify
def bounds(self):
bounds = self.metadata.get('bounds', '').split(',')
if len(bounds) != 4:
logger.warning(_("Invalid bounds metadata in '%s', fallback to whole world.") % self.name)
bounds = [-180,-90,180,90]
return tuple(map(float, bounds))
@reify
def center(self):
"""
Return the center (x,y) of the map at this zoom level.
"""
center = self.metadata.get('center', '').split(',')
if len(center) == 3:
lon, lat, zoom = map(float, center)
zoom = int(zoom)
if zoom not in self.zoomlevels:
logger.warning(_("Invalid zoom level (%s), fallback to middle zoom (%s)") % (zoom, self.middlezoom))
zoom = self.middlezoom
return (lon, lat, zoom)
# Invalid center from metadata, guess center from bounds
lat = self.bounds[1] + (self.bounds[3] - self.bounds[1])/2
lon = self.bounds[0] + (self.bounds[2] - self.bounds[0])/2
return (lon, lat, self.middlezoom)
@property
def minzoom(self):
z = self.metadata.get('minzoom', self.zoomlevels[0])
return int(z)
@property
def maxzoom(self):
z = self.metadata.get('maxzoom', self.zoomlevels[-1])
return int(z)
@property
def middlezoom(self):
return self.zoomlevels[len(self.zoomlevels)/2]
@reify
def zoomlevels(self):
return self._reader.zoomlevels()
def tile(self, z, x, y):
try:
return self._reader.tile(z, x, y)
except ExtractionError:
raise MissingTileError
def center_tile(self):
lon, lat, zoom = self.center
proj = GoogleProjection(app_settings.TILE_SIZE, [zoom])
return proj.tile_at(zoom, (lon, lat))
def grid(self, z, x, y, callback=None):
try:
return self._reader.grid(z, x, y, callback)
except ExtractionError:
raise MissingTileError
def jsonp(self, request, callback):
# Raw metadata
jsonp = dict(self.metadata)
# Post-processed metadata
jsonp.update(**{
"bounds": self.bounds,
"center": self.center,
"minzoom": self.minzoom,
"maxzoom": self.maxzoom,
})
# Additionnal info
tilepattern = reverse("mbtilesmap:tile", kwargs=dict(name=self.id, x='{x}',y='{y}',z='{z}'))
tilepattern = request.build_absolute_uri(tilepattern)
tilepattern = tilepattern.replace('%7B', '{').replace('%7D', '}')
jsonp.update(**{
"id": self.id,
"name": self.name,
"scheme": "xyz",
"basename": self.basename,
"filesize": self.filesize,
"tiles": [tilepattern],
})
return '%s(%s);' % (callback, json.dumps(jsonp))
