mapmaker.output.tilemaker module

class mapmaker.output.tilemaker.Rect(*args)[source]

Bases: object

property geometry

property height

property size

property size_as_int

property width

property x0

property x1

property y0

property y1

class mapmaker.output.tilemaker.Transform(scale=None, translateA=None, translateB=None)[source]

Bases: Transform

transform_rect(rect)[source]

class mapmaker.output.tilemaker.TileSet(extent, max_zoom)[source]

Bases: object

The set of tiles covering a geographic extent.

Parameters:

extent (tuple(float, float, float, float)) –
max_zoom (int) –

property end_coords

Tile coordinates of the last tile. :rtype: tuple(int, int)

Type:: returns

property extent

The geographic extent covered by the tile set. :rtype: tuple(float, float, float, float)

Type:: returns

property start_coords

Tile coordinates of the first tile. :rtype: tuple(int, int)

Type:: returns

property pixel_rect

Extent as tile pixel coordinates. :rtype: Rect

Type:: returns

property tile_pixels_to_world

Transform from tile pixel coordinates to world coordinates. :rtype: Transform

Type:: returns

property tile_size

The size of a tile in pixels. :rtype: tuple(int, int)

Type:: returns

property tiles

List of mercantile.Tile tiles spanning an extent. :rtype: list

Type:: returns

property tile_coords_to_pixels

Transform from tile coordinates to tile pixel coordinates. :rtype: Transform

Type:: returns

tile_pixels_to_image(image_rect)[source]

Parameters:: image_rect – The image rectangle
Returns:: Transform from tile pixel coordinates to imasge pixels.
Return type:: Transform

property world_to_tile_pixels

Transform from world coordinates to tile pixel coordinates. :rtype: Transform

Type:: returns

class mapmaker.output.tilemaker.RasterTiler(raster_layer, tile_set, image_rect)[source]

Bases: object

Extract tiles from a RasterSource.

Parameters:

raster_layer –
tiles (TileSet) – the set of tiles spanning an extent
image_rect (Rect) – source bounds in image pixel coordinates

property image_rect

property tile_size

extract_tile_as_image(image_tile_rect)[source]

get_scaling(image_tile_rect)[source]

get_tile(tile)[source]

class mapmaker.output.tilemaker.RasterImageTiler(raster_layer, tile_set, image, image_to_local_world)[source]

Bases: RasterTiler

extract_tile_as_image(image_tile_rect)[source]

class mapmaker.output.tilemaker.ImageTiler(raster_layer, tile_set)[source]: Bases: RasterImageTiler

class mapmaker.output.tilemaker.SVGImageTiler(raster_layer, tile_set)[source]: Bases: RasterImageTiler

class mapmaker.output.tilemaker.RasterTileMaker(raster_layer, output_dir, max_zoom=10)[source]

Bases: object

A class for generating image tiles for a map

Image tiles are stored as mbtiles in a SQLite3 database.

The raster layer’s extent together with the map’s maximum zoom level is used to determine the set of tiles that cover the layer, the transform from map world coordinates to tile pixel coordinates, and the the location of the layer in terms of tile pixels.

Parameters:

raster_layer (RasterLayer) – The raster layer to tile
output_dir (str) – The directory in which to store image tiles
max_zoom (int) – The range of zoom levels to generate tiles. Optional, defaults to MAX_ZOOM

property raster_layer

have_tiles()[source]

make_tiles()[source]