1.9 KiB
Streckenkarte
A tool to display maps of lines as vector tiles using leaflet.
Dependencies
- Tippecanoe
- ogrmerge (part of gdal-bin in Debian)
Usage
This software is meant to be installed as a hosted installation for
several maps. This is done by putting the files in the frontend
directory on a web server so they appear as /common/*, and then
creating a directory for each map, with the maps appearing at
/$mapname/. This directory should contain a strecken.pmtiles
containing the vector tiles, as well as a layers.json containing
metadata, and the web server should be configured to display
/common/index.html when accessing /$mapname/. This can be achieved
on nginx with the following snippet:
location ~ /.+/$ {
rewrite ^/(.*)$ /common/index.html last;
}
The strecken.pmtiles file is best generated using the
mapbuilder.sh script. Furthermore, exporting maps from umap is
possible using the umap-extractor.py script, which takes care of
exporting the data as well as the graphical style for each layer.
A sample git post-receive hook is provided to build and deploy the
map when the map data is pushed.
Input Data
The input data for strecken.pmtiles consists of a data/ folder,
with one subfolder for each layer. In each of these folders, the lines
to be displayed on the map can be deposited in any format understood
by ogrmerge, for instance,
GeoJSON or gpx.
Troubleshooting
My pmtiles file is huge (hundreds of megabytes)
This may be caused due to metadata from the input geojson files being carried over into the tiles, leading to that metadata getting copied into every tile that has that feature, brouter is known to sometimes add unreasonable amounts of metadata to its exports. The metadata can be stripped by running
jq 'del( .features[] .properties )'
on the input file with excessive metadata.