106 lines
4.8 KiB
Markdown
106 lines
4.8 KiB
Markdown
[](geo/schweiz_ex.png?raw=true)
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*Left: station-to-station path of a single train through Switzerland obtained from official schedule data. Right: path of the same train map-matched by pfaedle.*
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[](geo/stuttgart_ex.png?raw=true)
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*Left: station-to-station path of a single bus through Stuttgart obtained from official schedule data. Right: path of the same bus map-matched by pfaedle.*
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[](https://github.com/ad-freiburg/pfaedle/actions/workflows/build.yml)
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# pfaedle
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Precise OpenStreetMap (OSM) map-matching for public transit schedules ([GTFS](https://developers.google.com/transit/gtfs/reference/) data).
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First described in [this 2018 SIGSPATIAL paper](http://ad-publications.informatik.uni-freiburg.de/SIGSPATIAL_Sparse%20map%20matching%202018.pdf).
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For a quick visual inspection of the shape quality, see for example the schedule data for Germany or Switzerland in our tool [TRAVIC](https://travic.app/?z=7&x=1261608.6&y=6430601.6).
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## Requirements
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* `cmake`
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* `gcc >= 5.0` (or `clang >= 3.9`)
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* `libzip` (optional, for ZIP support)
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## Building and Installation
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Fetch this repository and init submodules:
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```
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git clone --recurse-submodules https://github.com/ad-freiburg/pfaedle
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```
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```
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mkdir build && cd build
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cmake ..
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make -j
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```
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To install, type
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```
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make install
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```
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# General Usage
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## Generating shapes for a GTFS feed
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```
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pfaedle -x <OSM FILE> <GTFS INPUT FEED>
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```
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A shape'd version of the input GTFS feed will be written to `./gtfs-out`.
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By default, shapes are only calculated for trips that don't have a shape in the
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input feed. To drop all existing shapes, use the `-D` flag.
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For example, you may generate (and replace existing, see -D parameter) shapes for the GTFS dataset for Freiburg like this:
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```
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$ wget https://fritz.freiburg.de/csv_Downloads/VAGFR.zip
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$ wget http://download.geofabrik.de/europe/germany/baden-wuerttemberg/freiburg-regbez-latest.osm.bz2 && bunzip2 freiburg-regbez-latest.osm.bz2
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$ pfaedle -D -x freiburg-regbez-latest.osm VAGFR.zip
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```
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## Generating shapes for a specific MOT
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To generate shapes for a specific mot only, use the `-m` option. Possible
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values are either `tram`, `bus`, `coach`, `rail`, `subway`, `ferry`, `funicular`,
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`gondola`, `all` (default) or GTFS route type codes (0, 1, 2, 3, 4, 5, 6, 7, or [extended route types](https://developers.google.com/transit/gtfs/reference/extended-route-types)). Integer codes will only match the specific route type, while string codes will match classes of route types. For example, `-m 101` will only match routes with `route_type` `101` (high speed rail), while `-m rail` will match any rail service encoded via a standard `route_type` `2` or an extended `route_type` describing a rail service (e.g. `100`, `101`, `102`, ...).
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Multiple values can be specified (comma separated).
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## OSM filtering
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`pfaedle` comes with the ability to filter OpenStreetMap data. If you specify
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the `-X` flag, `pfaedle` will filter the input OSM file and output a new OSM
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file which contains exactly the data needed to calculate the shapes for the
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input GTFS feed and the input configuration.
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This can be used to avoid parsing (for example) the entire `planet.osm` on each
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run.
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## via Docker
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You can use the [`adfreiburg/pfaedle` Docker image](https://hub.docker.com/r/adfreiburg/pfaedle) by mounting the OSM & GTFS data into the container:
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```shell
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docker run -i --rm \
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# mount OSM data
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--volume /path/to/osm/data:/osm \
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# mount GTFS data
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--volume /path/to/gtfs/data:/gtfs \
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# tell pfaedle where to find the data
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adfreiburg/pfaedle -x /osm/osm-data.xml -i /gtfs
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```
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## Debugging
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The following flags may be useful for debugging:
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* `-T <GTFS TRIP ID>` only calculate shape for a single trip (specified via its GTFS trip id) and output it as GeoJSON to
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`<dbg-path>/path.json`
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* `--write-graph` write the graph used for routing as GeoJSON to
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* `--write-trgraph` write the complete network graph to `<dbg-path>/trgraph.json`
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# Configuration
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A default configuration file `pfaedle.cfg` can be found in this repo and will be installed with `make install`. Custom configuration files can be specified with the `-c` flag. If no `-c` flag is set, `pfaedle` will parse and merge the following cfg files in the given order (if present): `<install prefix>/etc/pfaedle/pfaedle.cfg`, `$HOME/.config/pfaedle/pfaedle.cfg`, `<CWD>/pfaedle.cfg`. Values given in later files will overwrite earlier defined values.
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