Hello,Map! is a generator for the most basic framework of a web-based map, including a custom tiled basemap image, icons, and a toggleable legend.
- Python 3
- Pillow Python Imaging Library
- simple local web server for testing (e.g., http-server)
Configuration parameters are defined in hello-map-config.yml for many app features.
To generate tiles, simply run:
python lib/tile_image.pyThis will create a standard tiled image directory tree at ./app/tiles using the standard /{z}/{x}/{y}.png path structure (./app/tiles/2/1/0.png)
Tiling is configured to begin at zoom level 1, breaking the image up into a 2x2 grid of 256px x 256px tiles, and continuing on to the zoom level that allows the image to be rendered at its original resolution in 256px x 256px tiles. For example, an image that is 3300px x 2000px would need 13 x 8 256px x 256px tiles. This would be supported at zoom level 4 which covers 16 x 16 tiles.
Caution!!! This app can create a very large number of files and data depending on the size of the image (https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames)
To generate the template webmap, simply run:
python lib/build_webmap.pyThis will create a new landing page at app/index.html.
Point your http server folder to the app/ folder and open in browser. If using http_server, this is just http-server ./app/.
The example image examples/oblique_aerial_image.tif is included by permission of its owner, me, Jonathan Dandois.