Mapping Virtual Challenges

This is the notes, scripts, and tools I used to build the maps for the virtual running challenges.

Specific Maps

• Route 66
• North Coast 500

Software install

Use scripts/build-mapnik.sh to build mapnik (version 4.0 from HEAD) and python-mapnik.

brew install postgresql@14 postgis osm2pgsql
pip3 install nik4
git clone https://github.com/gravitystorm/openstreetmap-carto.git
git clone https://github.com/mapnik/mapnik.git
git clone https://github.com/mapnik/python-mapnik.git

Setup

Download data from Geofabrik - the route readme files for details.

To start the PostgresQL database:

brew services run postgresql@14

To prepare the database (you might want to delete the database first?):

createdb gis
psql -d gis -c 'CREATE EXTENSION postgis; CREATE EXTENSION hstore;'

To load the data:

cd openstreetmap-carto
osm2pgsql -G --hstore --style openstreetmap-carto.style --tag-transform-script openstreetmap-carto.lua -d gis ../data/us-latest.osm.pbf
./scripts/get-external-data.py

Build the mapnik.xml:

npm install -g carto
cd openstreetmap-carto
carto project.mml > mapnik.xml

Fonts

You need to use Font Book.app to check if the fonts are installed. If not:

cd openstreetmap-carto
./scripts/get-fonts.sh

Now use the Finder to drag all the font files to Font Book.

Tools

• PostgresQL - database
• PostGIS - geospatial extensions to the database
• osm2pgsql - load OSM data into the database
• Nik4 - render data to image