Generate static, Helsinki only map tiles from OpenStreetMap data

helsinki_maps.sh

# Bounding box from http://norbertrenner.de/osm/bbox.html
HELSINKI_BBOX=24.577,60.079,25.228,60.335

# OpenStreetMap extract file from Geofabrik
wget https://download.geofabrik.de/europe/finland-latest.osm.pbf

# Cut the 500 MB Finland data file into a 34 MB Helsinki data file
# as this is much faster than using the import bbox.
osmconvert finland-latest.osm.pbf -b="$HELSINKI_BBOX" --out-pbf >helsinki.pbf

docker volume create openstreetmap-data

docker run --rm -it -e THREADS=8 \
    -v `pwd`/helsinki.pbf:/data.osm.pbf \
    -v openstreetmap-data:/var/lib/postgresql/12/main \
    overv/openstreetmap-tile-server import

# The result is a 1.7 GB PostgreSQL data directory. Consider putting the volume on /dev/shm instead.

docker volume create openstreetmap-data

docker run -it --rm --name=osm -p 80:80 -e THREADS=4 \
    -v openstreetmap-data:/var/lib/postgresql/12/main \
    -v openstreetmap-rendered-tiles:/var/lib/mod_tile \
    overv/openstreetmap-tile-server run

docker exec -it osm render_list -a -z 4 -Z 13 -n 4 -m ajt

https://openlayers.org/en/latest/examples/heatmap-earthquakes.html
https://github.com/Overv/openstreetmap-tile-server

https://github.com/simonpoole/mapsplit

https://www.baremaps.com/ https://www.baremaps.com/examples/openstreetmap/
https://github.com/baremaps/baremaps/blob/main/baremaps-examples/openstreetmap/config.yaml
https://www.baremaps.com/assets/demo.html

Generating tiles without PostGIS with t-rex

https://xycarto.com/2021/04/30/static-vector-tiles-ii-openlayers-with-custom-projection/

Converting to the GDAL GPKG (sqlite3) format:

ogr2ogr -f GPKG helsinki.gpkg helsinki.pbf
xz --threads=0 -fkv helsinki.gpkg

docker run -v `pwd`/helsinki.gpkg:/tmp/helsinki.gpkg:ro sourcepole/t-rex genconfig --datasource /tmp/helsinki.gpkg
docker run -p 6767:6767 -v `pwd`/helsinki.gpkg:/var/data/in/helsinki.gpkg:ro -v `pwd`/helsinki_gpkg.toml:/var/data/in/myconfig.toml:ro sourcepole/t-rex serve --bind=0.0.0.0 --openbrowser=false --config=myconfig.toml

A much better solution: https://gist.github.com/mikaelhg/edf65dfad43e240fb4c483587b5e7f93