CATiledLayer (or anything else really...).
gem install tileup
rmagick for image manipulation, which depends on
imagemagick is avaliable through
To generate some tiles from a large image, you'll probably use something like:
tileup --in huge_image.png --output-dir image_tiles \ --prefix my_tiles --verbose
Which will split
huge_image.png up into
256x256 (default) sized tiles, and save them into the directory
image_tiles. The images will be saved as
image_tiles/my_tiles_0_0.png image_tiles/my_tiles_0_1.png image_tiles/my_tiles_0_2.png ...
tileup can also scale your image for a number of zoom levels (max 20 levels). This is done by scaling down the original image, so make sure its pretty big.
(Auto zooming is an experimental hack, it should work fine for smaller increments, but may be unreliable at higher levels. E.g.
--auto-zoom 4 should work fine,
--auto-zoom 20 might not work so well.)
tileup --in really_huge_image.png --auto-zoom 4 \ --output-dir map_tiles
--auto-zoom 4 means, make 4 levesl of zoom, starting from
really_huge_image.png at zoom level 20, then scale that down for 19, etc.
You should see something like:
map_tiles/20/map_tile_0_0.png map_tiles/20/map_tile_0_1.png map_tiles/20/map_tile_0_2.png ... map_tiles/19/map_tile_0_0.png map_tiles/19/map_tile_0_1.png map_tiles/19/map_tile_0_2.png ...
20 is zoom level 20, the largest zoom,
19 is half the size of
18 is half the size of
You can get help by running
Fixes and patches welcome, to contribute:
- Fork this project
- Create a feature or fix branch off the develop branch
- Submit a pull request on that branch