70 lines
2.7 KiB
Plaintext
70 lines
2.7 KiB
Plaintext
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################
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Open Street Maps
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################
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Much like Google Maps, ``Openstreetmaps`` is a map that allows you to navigate the world.
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The main difference being that OSM is free and can be self hosted.
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However there is not a *plug-and-play* solution that will host your own maps.
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It turns out that hosting your own maps, including geolocation and calculating distances is quite a big task, especially if you want to suppor the whole world.
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OSRM
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####
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**O**\pen **S**\ource **R**\outing **M**\achine (OSRM) is a project that allows you to calculate distances from a OSM map.
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See more about the project `here <https://project-osrm.org/>`_
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Setup
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-----
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Setting OSRM up is straightforward, but it requires you to the same docker container several times. In short the commands for the Netherlands are as follows:
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.. code-block:: console
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#Download The Netherlands
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mkdir -p data/
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cd data/
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wget https://download.geofabrik.de/europe/netherlands-latest.osm.pbf
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cd ../
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docker run --name osrm-backend -t -v "${PWD}/data:/data" osrm/osrm-backend osrm-extract -p /opt/car.lua /data/netherlands-latest.osm.pbf
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# Process the data
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docker run -a osrm-backend -t -v "${PWD}/data:/data" osrm/osrm-backend osrm-contract /data/netherlands-latest.osrm
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docker run -t -v "${PWD}/data:/data" osrm/osrm-backend osrm-partition /data/netherlands-latest.osrm
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docker run -t -v "${PWD}/data:/data" osrm/osrm-backend osrm-customize /data/netherlands-latest.osrm
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# Finaly run the routing engine
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docker run -t -i -p 5998:5000 -v "${PWD}/data:/data" osrm/osrm-backend osrm-routed --algorithm mld /data/netherlands-latest.osrm
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Now you can use curl to do requests to port ``5998``.
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.. note::
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When using Google Maps coordinates to send requests to OSRM, make sure that the Longitude and Latitude coordinates are not swapped.
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Nominatim
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#########
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As it turns out, ``OSRM`` is a very good routing engine but it can't do geolocation. To solve this ``Nominatim`` was used to resolve postal codes to coordinates.
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.. code-block:: console
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$ cat run_nominatim.sh
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#! /bin/bash
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docker run -it \
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-e PBF_PATH=/nominatim/data/netherlands-latest.osm.pbf \
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-v "${PWD}/data:/nominatim/data" \
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-e REPLICATION_URL=https://download.geofabrik.de/europe/netherlands-updates/ \
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-p 5999:8080 \
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--name nominatim \
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mediagis/nominatim:4.2
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This will result in a website that is accessible on port 5999 to which you can send queries.
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IP Firewall
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###########
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Procesing routing data is hard.
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In order to prevent bots from misusing these interfaces a firewall rule was added to only allow incomming traffic from specific ip addresses.
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.. code-block:: console
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$ sudo ufw allow from <ip_addr> to any port 5998
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$ sudo ufw allow from <ip_addr> to any port 5999
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