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As you can see, the draw* callback takes three arguments: | As you can see, the draw* callback takes three arguments: | ||
* the canvas group/layer to be used | * the canvas group/layer to be used | ||
* the layer-specific "model" information (airport/apt in this case) | * the layer-specific "model" information (airport/apt in this case, could also be a navaid, fix or waypoint) | ||
* an LOD argument (currently not yet used). | * an LOD argument (currently not yet used). | ||