Small heaps of code

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====== Users ======

===== Server API =====

[[https://github.com/Project-OSRM/osrm-backend/blob/master/docs/http.md|Doc]]

==== Time and distance ====

<code>
# from Timisoara to Sevilla
curl http://10.101.21.34:5000/route/v1/driving/21.2250,45.7557;-5.9251,37.3682?overview=false
# coordinates are always lon/lat
</code>

==== Geometries ====

<code>
# from Graz to Vienna

curl "http://10.101.21.34:5000/route/v1/driving/9.7303,47.4174;15.4571,47.0503?overview=false"
</code>

===== Future work =====

km distance matrix:

[[https://github.com/Project-OSRM/osrm-backend/issues/1353#issuecomment-170942623|https://github.com/Project-OSRM/osrm-backend/issues/1353#issuecomment-170942623]]

[[https://github.com/Project-OSRM/osrm-backend/pull/2764|https://github.com/Project-OSRM/osrm-backend/pull/2764]]

traffic data:

[[https://github.com/Project-OSRM/osrm-backend/wiki/Traffic|https://github.com/Project-OSRM/osrm-backend/wiki/Traffic]]

====== Admin ======

Backend [[https://github.com/Project-OSRM/osrm-backend|https://github.com/Project-OSRM/osrm-backend]]

Wiki [[https://github.com/Project-OSRM/osrm-backend/wiki|https://github.com/Project-OSRM/osrm-backend/wiki]]

===== Preprocess =====

==== Hardware ====

You will need a resourceful server with at least

  * 200G RAM for planet
  * 60G RAM for Europe.

I used flexo for preprocessing CH.

==== Software ====

[[https://github.com/Project-OSRM/osrm-backend/wiki/Building-on-Ubuntu|Prerequisites]]

<code>
git clone https://github.com/Project-OSRM/osrm-backend.git
cd osrm-backend/
mkdir -p build
cd build/
cmake .. -DCMAKE_BUILD_TYPE=Release
cmake --build .
</code>

wget [[http://planet.osm.org/pbf/planet-latest.osm.pbf|http://planet.osm.org/pbf/planet-latest.osm.pbf]]

[[https://github.com/Project-OSRM/osrm-backend/wiki/Profiles|Profiles]] define routing behaviour (turn restrictions etc).

Then decide which routing type you want: Dijkstra or Contraction hierarchies:

==== Contraction Hierarchies (CH) ====

<code>
osrm-extract -p profiles/car.lua the.osm.pbf
osrm-contract the.osrm
</code>

Preprocessing the planet file takes about

  * ~3 hours for extracting planet data
  * ~10 for contracting planet data

==== Multi-Level Dijkstra (MLD) ====

<code>
osrm-extract -p profiles/car.lua  the.osm.pbf
osrm-partition the.osrm
osrm-customize the.osrm
</code>

===== Deploy service =====

[[https://github.com/Project-OSRM/osrm-backend/wiki/Running-OSRM|https://github.com/Project-OSRM/osrm-backend/wiki/Running-OSRM]]

==== Hardware ====

A tinier server is sufficient here.

For planet you'll need > 100G RAM.

For Europe I used one with 64G RAM.

==== Software ====

[[https://github.com/Project-OSRM/osrm-backend/wiki/Building-on-Ubuntu|Prerequisites]]

<code>
git clone https://github.com/Project-OSRM/osrm-backend.git
cd osrm-backend/
mkdir -p build
cd build/
cmake .. -DCMAKE_BUILD_TYPE=Release
cmake --build .

# and install

sudo cmake --build . --target install

# uninstall is possible too

sudo cmake –build . –target uninstall
</code>

==== Contraction Hierarchies (CH) ====

<code>
osrm-routed --algorithm=ch  --max-table-size=1000  the.osrm # to allow for bigger distance matrix
</code>

==== Multi-Level Dijkstra (MLD) ====

<code>
osrm-routed –algorithm=MLD the.osrm
</code>
Small heaps of code

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