def testValidPolygonConversions(self):
self.assertEqual(
1,
len(
slippy_util.convert_polygon_to_tiles(0, [(0, 0), (1, 1.5),
(2, 0), (0, 0)])))
self.assertEqual(
2,
len(
slippy_util.convert_polygon_to_tiles(5, [(0, 0), (1, 1.5),
(2, 0), (0, 0)])))
# check auto closing
self.assertEqual(
slippy_util.convert_polygon_to_tiles(9, [(0, 0), (1, 1.5),
(2, 0)]),
slippy_util.convert_polygon_to_tiles(9, [(0, 0), (1, 1.5), (2, 0),
(0, 0)]))
# 4 points are in 4 separate grids,
# and there are 4 grids underlapping the path, and 1 grid surrounded
self.assertEqual(
9,
len(
slippy_util.convert_polygon_to_tiles(9, [(47.5, -103),
(47.5, -101.8),
(48, -101.8),
(48, -103),
(47.5, -103)])))
def testInvalidPolygonConversions(self):
with self.assertRaises(TypeError):
slippy_util.convert_polygon_to_tiles(0, None)
with self.assertRaises(TypeError):
slippy_util.convert_polygon_to_tiles(0, 0)
with self.assertRaises(TypeError):
slippy_util.convert_polygon_to_tiles(0, '0,0,1,1.5')
with self.assertRaises(ValueError):
slippy_util.convert_polygon_to_tiles(0, [])
with self.assertRaises(ValueError):
slippy_util.convert_polygon_to_tiles(0, [(0), (1)])
def testInvalidPathConversions(self):
with self.assertRaises(TypeError):
slippy_util.convert_path_to_tiles(0, None)
with self.assertRaises(TypeError):
slippy_util.convert_path_to_tiles(0, 0)
with self.assertRaises(TypeError):
slippy_util.convert_path_to_tiles(0, '0,0,1,1.5')
with self.assertRaises(ValueError):
slippy_util.convert_path_to_tiles(0, [])
with self.assertRaises(TypeError):
slippy_util.convert_path_to_tiles(0, [(0), (1)])
# test a lot of tiles calculation
with self.assertRaises(OverflowError):
slippy_util.convert_polygon_to_tiles(15, [(47.5, -103),
(47.5, -101.8),
(48, -101.8), (48, -103),
(47.5, -103)])
def testSlippyConversionsForSpecialCases(self):
# 4x4 grid used for these tests at zoom 4
# 8,8 9,8 10,8 11,8
# 8,9 9,9 10,9 11,9
# 8,10 9,10 10,10 11,10
# 8,11 9,11 10,11 11,11
# points of interest
point_8x8 = (-19.808, 20.039)
point_8x11 = (-65.730, 19.160)
point_11x11 = (-58.263, 71.367)
point_11x8 = (-6.839, 82.441)
# all 16 for all four by polygon
self.assertEqual(
16,
len(
slippy_util.convert_polygon_to_tiles(
4, [point_8x8, point_8x11, point_11x11, point_11x8])))
# only 10 by path (no closing the path)
self.assertEqual(
10,
len(
slippy_util.convert_path_to_tiles(
4, [point_8x8, point_8x11, point_11x11, point_11x8])))
# corner to corner should be 7
self.assertEqual(
7,
len(slippy_util.convert_path_to_tiles(4,
[point_8x8, point_11x11])))
self.assertEqual(
7,
len(slippy_util.convert_path_to_tiles(4,
[point_8x11, point_11x8])))
# triangle to the bottom is 11
self.assertEqual(
11,
len(
slippy_util.convert_polygon_to_tiles(
4, [point_11x8, point_8x11, point_11x11, point_11x8])))
def ConvertCoordinatesToSlippy(zoom):
"""Converts an CSV of coords to slippy tile format at the specified zoom.
Args:
zoom: zoom level to use for encapsulating the tiles
Plus posted webarg coords: csv of lon,lat,long,lat,etc.
Returns:
200 with tiles array in JSON format,
or the nominal 4xx error codes as necessary.
"""
log.info('Convert coordinates to slippy instantiated for %sz...', zoom)
try:
zoom = int(zoom)
tiles = []
coords = _GetRequestParameter('coords', '')
coord_type = _GetRequestParameter('coord_type', 'point')
log.debug('Retrieved coords from web params and split to %s...',
coords)
coordinates = slippy_util.convert_csv_to_coordinates(coords)
if not coordinates:
log.error('Invalid coords %s, must be a CSV of lat,lon...', coords)
raise ValueError(
'Invalid coords, must be a CSV of lat,lon,lat,lon...')
if coord_type == 'point':
for c in coordinates:
tiles.append(
(slippy_util.convert_point_to_tile(zoom, c[0], c[1])))
elif coord_type == 'path':
tiles = slippy_util.convert_path_to_tiles(zoom, coordinates)
elif coord_type == 'polygon':
tiles = slippy_util.convert_polygon_to_tiles(zoom, coordinates)
else:
raise ValueError('Invalid coord_type, must be point/path/polygon')
result = []
for x, y in tiles:
link = 'http://tile.openstreetmap.org/%d/%d/%d.png' % (zoom, x, y)
tile = {'link': link, 'zoom': zoom, 'x': x, 'y': y}
if tile not in result:
result.append(tile)
except (ValueError, TypeError) as e:
log.error('/slippy error: %s...', e.message)
abort(status.HTTP_400_BAD_REQUEST, e.message)
return jsonify({
'status': 'success',
'data': {
'zoom': zoom,
'grid_cells': result,
}
})
def _ConvertRequestToTiles(zoom):
"""Converts an CSV of coords into slippy tile format at the specified zoom
and the specified coordinate type (path, polygon, point) """
tiles = []
coords = _GetRequestParameter('coords', '')
coord_type = _GetRequestParameter('coord_type', 'point').lower()
log.debug('Retrieved coords from web params and split to %s...', coords)
coordinates = slippy_util.convert_csv_to_coordinates(coords)
if not coordinates:
log.error('Invalid coords %s, must be a CSV of lat,lon...', coords)
raise ValueError('Invalid coords, must be a CSV of lat,lon,lat,lon...')
if coord_type == 'point':
for c in coordinates:
tiles.append((slippy_util.convert_point_to_tile(zoom, c[0], c[1])))
elif coord_type == 'path':
tiles = slippy_util.convert_path_to_tiles(zoom, coordinates)
elif coord_type == 'polygon':
tiles = slippy_util.convert_polygon_to_tiles(zoom, coordinates)
else:
raise ValueError('Invalid coord_type, must be point/path/polygon')
return tiles