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Route Annotator

This is a NodeJS module that indexes connected node pairs in OSM data, and allows you to query for meta-data. It's useful for retrieving tag information when you have geometry from your basemap.

Requires

• Node >= 4

Building

To install via binaries:

npm install

To install from source, first install a C++14 capable compiler then run:

make

Testing

To run the tests (which run both the JS tests and the C++ tests):

make test

To run just the JS tests:

npm test

To run the C++ tests:

./build/Release/basic-tests

Usage

This library contains two main modules: Annotator and SpeedLookup

Annotator

The Annotator() object is for looking up OSM tag data from OSM node IDs or coordinates.

Example:

var taglookup = new (require('route_annotator')).Annotator();

// Lookup some nodes and find out which ways they were on,
// and what tags they had
taglookup.loadOSMExtract(path.join(__dirname,'data/winthrop.osm'), (err) => {
  if (err) throw err;
  var nodes = [50253600,50253602,50137292];
  taglookup.annotateRouteFromNodeIds(nodes, (err, wayIds) => {
    if (err) throw err;
    annotator.getAllTagsForWayId(wayIds[0], (err, tags) => {
      if (err) throw err;
      console.log(tags);
    });
  });
}); 


// Do the same thing, but this time use coordinates instead
// of node ids.  Internally, a radius search finds the closest
// node within 5m
taglookup.loadOSMExtract(path.join(__dirname,'data/winthrop.osm'), (err) => {
  if (err) throw err;
  var coords = [[-120.1872774,48.4715898],[-120.1882910,48.4725110]];
  taglookup.annotateRouteFromLonLats(coords, (err, wayIds) => {
    if (err) throw err;
    annotator.getAllTagsForWayId(wayIds[0], (err, tags) => {
      if (err) throw err;
      console.log(tags);
    });
  });
}); 

SpeedLookup

The SpeedLookup() object is for loading segment speed information from CSV files, then looking it up quickly from an in-memory hashtable.

Example:

var speedlookup = new (require('route_annotator')).SpeedLookup();

// Loads example.csv, then looks up the pairs 123-124, 124-125, 125-126
// and prints the speeds for those segments (3 values) as comma-separated
// data
speedlookup.loadCSV("example.csv", (err) => {
  if (err) throw err;
  speedlookup.getRouteSpeeds([123,124,125,126],(err,results) => {
    if (err) throw err;
    console.log(results.join(","));
  });
});

The loadCSV method can also be passed an array of filenames.

---

Example HTTP server

npm install
curl --remote-name http://download.geofabrik.de/europe/monaco-latest.osm.pbf
node example-server.js monaco-latest.osm.pbf

Then, in a new terminal, you should be able to do:

curl "http://localhost:5000/coordlist/7.422155,43.7368838;7.4230139,43.7369751"

---

Release

• git checkout master
• Update CHANGELOG.md
• Bump version in package.json
• git commit -am "vx.y.z [publish binary]" with Changelog list in commit message
• Wait for Travis to finish publishing binaries so that all travis tests pass for the publish binary commit.
• git tag vx.y.z -a with Changelog list in tag message
• git push origin master; git push origin --tags
• npm publish