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Rebuild grab_tile

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Chris Pham
2018-01-20 13:43:47 -08:00
parent fee5b5537b
commit 3565e7b57f
1 changed files with 23 additions and 6 deletions
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29
ground_station/resources/core/mapping.py
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@@ -60,8 +60,8 @@ class GMapsStitcher(object):
self.radius_meters = radius_meters self.radius_meters = radius_meters
self.num_tiles = num_tiles self.num_tiles = num_tiles
def _new_image(self): def _new_image(self, width, height):
return PIL.Image.new('RGB', (self.width, self.height)) return PIL.Image.new('RGB', (width, height))
def _fast_round(self, value, precision): def _fast_round(self, value, precision):
return int(value * 10 ** precision) / 10. ** precision return int(value * 10 ** precision) / 10. ** precision
@@ -73,14 +73,14 @@ class GMapsStitcher(object):
# https://groups.google.com/forum/#!topic/google-maps-js-api-v3/hDRO4oHVSeM # https://groups.google.com/forum/#!topic/google-maps-js-api-v3/hDRO4oHVSeM
return 2 ** self.zoom / (156543.03392 * math.cos(math.radians(self.latitude))) return 2 ** self.zoom / (156543.03392 * math.cos(math.radians(self.latitude)))
def _grab_tile(self, sleeptime=0): def _grab_tile(self, longitude, latitude, sleeptime=0):
# Make the url string for polling # Make the url string for polling
# GET request header gets appended to the string # GET request header gets appended to the string
urlbase = 'https://maps.googleapis.com/maps/api/staticmap?' urlbase = 'https://maps.googleapis.com/maps/api/staticmap?'
urlbase += 'center=%f%f&zoom=%d&maptype=%s&size=%dx%d&format=jpg&key=%s' urlbase += 'center=%f%f&zoom=%d&maptype=%s&size=%dx%d&format=jpg&key=%s'
# Fill the formatting # Fill the formatting
specs = self.latitude, self.longitude, self.zoom, self.maptype, _TILESIZE, _KEY specs = latitude, longitude, self.zoom, self.maptype, _TILESIZE, _KEY
filename = 'Resources/Maps/' + ('%f_%f_%d_%s_%d_%d_%s' % specs) + '.jpg' filename = 'Resources/Maps/' + ('%f_%f_%d_%s_%d_%d_%s' % specs) + '.jpg'
# Tile Image object # Tile Image object
@@ -112,8 +112,8 @@ class GMapsStitcher(object):
def _pixels_to_lat(self, iterator, lat_pixels): def _pixels_to_lat(self, iterator, lat_pixels):
# Magic Lines # Magic Lines
degree = self._pixels_to_degrees((iterator - self.num_tiles / 2) * _TILESIZE, self.zoom) degree = self._pixels_to_degrees((iterator - self.num_tiles / 2) * _TILESIZE, self.zoom)
temp = math.atan(math.exp(((lat_pixels + degree) - _EARTHPIX) temp = math.atan(math.exp(((lat_pixels + degree) - _EARTHPIX))/ _pixrad)
return math.degrees(math.pi / 2 - 2 * temp / _pixrad))) return math.degrees(math.pi / 2 - 2 * temp)
def fetch_tiles(self,): def fetch_tiles(self,):
# cap floats to precision amount # cap floats to precision amount
@@ -124,3 +124,20 @@ class GMapsStitcher(object):
if self.radius_meters is not None: if self.radius_meters is not None:
self.num_tiles = int(round(2*self._pixels_to_meters / (_TILESIZE / 2. / self.radius_meters))) self.num_tiles = int(round(2*self._pixels_to_meters / (_TILESIZE / 2. / self.radius_meters)))
lon_pixels = _EARTHPIX + self.longitude * math.radians(_pixrad)
sin_lat = math.sin(math.radians(self.latitude))
lat_pixels = _EARTHPIX - _pixrad * math.log((1+sin_lat)/(1-sin_lat))/2
big_size = self.num_tiles * _TILESIZE
big_image = self._new_image(big_size, big_size)
for j in range(self.num_tiles):
lon = self._pixels_to_lon(j,lon_pixels)
for k in range(self.num_tiles):
lat = self._pixels_to_lat(k, lat_pixels)
tile = self._grab_tile(lon, lat)
big_image.paste(tile, (j * _TILESIZE, k * _TILESIZE))
big_image.save("buttholes.jpg")