points.xml

The points.xml file is used define fixed point elements which can be used in maps instead of <point> elements based on latitude/longitude or cartesian x,y coordinates. These are especially useful when drawing airways or specific procedures based on waypoints (SID, STAR, LOA information, etc…)

The points.xml file is located in the fir/ directory.

Elementpoint
AttributeFormatRemarks
idstringIdentification of the predefined point
latstringlatitude value
lonstringlongitude value

or

Elementpoint
AttributeFormatRemarks
idstringIdentification of the predefined point
xfloatcartesian X value in nautical mile
yfloatcartesian Y value in nautical mile

If cartesian X/Y attribute values are used, the point is calculated using the <origin> given in the FIR configuration file (config.fir). The format of the latitude/longitude values is Zdddmmsssss where:

Latitude / Longitude

The following is also valid: lon=“W0033535” → W003:35:35.000

Example

A point element needs to be defined in the points.xml file:

<points>
    <point id="COA"   lat="N0512053002" lon="E0032119001"/>
</points>

You can then reference that point in any map, replacing latitude/longitude or cartesian x/y pairs.

<symbol id="vor_symbol" text="COA" color="symbol_vor_color" lat="N0512053002" lon="E0032119001"/>

could be replaced by:

<symbol id="vor_symbol" text="COA" color="symbol_vor_color" ref="COA" />

Another example …

If you would like to draw a circle around a known VOR beacon …

<circle radius="10" segments="64" r="255" g="0" b="0">
      <point lat="N0512053002" lon="E0032119001"/>
</circle>

could be replaced by:

<circle radius="10" segments="64" r="255" g="0" b="0">
      <point ref="COA"/>
</circle>

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