hypso.georeference.georef.gmaps module

class hypso.georeference.georef.gmaps.GoogleMapDownloader(lat, lng, zoom=12, layer='s')

Bases: object

A class which generates high resolution google maps images given a longitude, latitude and zoom level

generateImage(**kwargs)

Generates an image by stitching a number of google map tiles together.

Parameters:

kwargs – center_tile_x: The center tile x coordinate center_tile_y: The center tile y coordinate tile_count_x: The number of tiles wide the image should be tile_count_y: The number of tiles high the image should be

Returns:

A high-resolution Goole Map image, and the tile coordinates of the top left tile in the image.

Return type:

Tuple[Image, tuple]

latlon_to_tileXY()

Generates an X,Y tile coordinate based on the latitude, longitude and zoom level

Returns:

An X,Y tile coordinate

Return type:

Tuple[float, float]

class hypso.georeference.georef.gmaps.GoogleMapsLayers

Bases: object

Google Maps Layers Class

ALTERED_ROADMAP = 'r'

HYBRID = 'y'

ROADMAP = 'v'

SATELLITE = 's'

TERRAIN = 'p'

TERRAIN_ONLY = 't'

hypso.georeference.georef.gmaps.main()

Main entry point

Returns:

Return type:

None

hypso.georeference.georef.gmaps.pixel_to_latlon(px_x, px_y, tl_x, tl_y, zoom_level)

Pixel to Lat Lon

Parameters:

• px_x – Pixel coordinates of google maps image (can be float)

• px_y – Pixel coordinates of google maps image (can be float)

• tl_x – tile indices of top left (noth-western) corner (must be int)

• tl_y – tile indices of top left (noth-western) corner (must be int)

• zoom_level – zoom level of the image (also must be int)

Returns:

lat,lon

Return type:

Tuple[float, float]