We should use that (the override keyword) at more places, me thinks.

What is the idea here? Use the altitude for zooming? The zoomLevel property is not used for that IIRC.

Yes, seems that is clueless code :) Inspired from FileLoaderPrivate::createFilterProperties and what it does for // Mountain (H), Volcano (V), Shipwreck (W).
But right, now looking at the API dox of GeoDataFeature::setZoomLevel() this is complete bogus, and I just should set it to 1, so the search result is always shown.