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spec-map-format.md

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OpenMetroMaps Map Format

This is a draft!

Basic structure

The file should begin with this line:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

All data is contained within an omm-file element:

<omm-file version="1.0.0">
  ...
</omm-file>

The omm-file element contains a stations element, a lines element and optionally a number of view elements.

Stations and Lines

Within the stations element, a list of station elements declares the stations available on the map along with their geographic coordinates:

<stations>
  <station lat="52.521515" lon="13.412305" name="Alexanderplatz"/>
  <station lat="52.520387" lon="13.386885" name="Friedrichstraße"/>
  <station lat="52.522648" lon="13.402209" name="Hackescher Markt"/>
</stations>

Within the lines element, a list of line elements declares the lines available on the map. A line has a name, a color and can be circular. Each line element contains a number of stop references to stations that define the schematic trajectory of the line:

<lines>
  <line circular="false" color="#006CB3" name="S3">
    <stop station="Alexanderplatz"/>
    <stop station="Hackescher Markt"/>
    <stop station="Friedrichstraße"/>
  </line>
</lines>

Views

A map file can specify a number of views. Each view defines the appearance of the map in terms of the positions of the stations on the scene with Euclidean coordinates and other properties that effect the visual appearance:

<view name="Berlin" scene-height="904.137943" scene-width="1000.000000"
      start-x="386.178629" start-y="478.710910">
  ...
</view>

The view element contains a number of station and edges elements.

Each station must be assigned an Euclidean coordinate:

<station name="Alexanderplatz" x="424.775181" y="461.793637"/>
<station name="Friedrichstraße" x="392.200080" y="459.965281"/>
<station name="Hackescher Markt" x="408.133553" y="459.451927"/>

We can define which edges of a line should be displayed on the map:

<edges line="S3"/>
<edges line="S45">
  <interval from="Adlershof" to="Flughafen Berlin-Schönefeld"/>
</edges>