Experimenting with GPX trace overlays

I’m planning to add a “bring your own GPX track” feature that allows to upload a GPX track to put on any given map as an overlay, including automatic bounding box detection.

This could e.g. be used to produce custom hiking maps from tracks downloaded from WayMarkedTrails.

The image below shows a first attempt, showing a track with a single way point (and obviously without bounding box detection yet).

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Testing and Thumbnail previews

As part of the testing process I now generate samples of all base and overlay styles for a predefined area, measuring the time it takes to render (with all three result formats linked) and creating a list of thumbnail PNGs on an overview page, linking to the actual full size PNGs.

Next step: integrate the thumbnails into the style selection part of the “new map” form in some clever way …