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Request extent-change to exclude unintended nearby islands

Open Lee-Carre opened this issue 4 years ago • 4 comments

For the following (background) imagery

please alter the extent to exclude the Channel Islands (Jersey, Guernsey, etc.).

The imagery is clearly intended for France (and the islands haven't been French territory for several hundred years). While there is partial low-resolution imagery for the islands, it's not usable for any productive work, and is a distraction in the list when needing imagery of specific features (since it often renders blank when highly zoomed in).

Unless, of course, the source needs to be updated.

Try it; zoom in to (Jersey at) a level as if you were going to add some building outlines, then select either of those imagery sources.

Lee-Carre avatar Sep 09 '21 21:09 Lee-Carre

Hmm, I notice that the GeoJSON for Ortho HR doesn't include the CIs, yet when highly zoomed in (to said Islands) using Vespucci the imagery is still listed as applicable.

Is that then a bug for Vespucci, instead?

Lee-Carre avatar Sep 09 '21 22:09 Lee-Carre

Hmm, I notice that the GeoJSON for Ortho HR doesn't include the CIs, yet when highly zoomed in (to said Islands) using Vespucci the imagery is still listed as applicable.

Is that then a bug for Vespucci, instead?

No, it is the intended behaviour.

We don't retain the polygons (aka we throw them away) and just store the (multiple if a MP) bounding boxes instead. The reasons for this are on the one hand the amount of heap it would cost to keep them in memory and on the other hand the lack of geospatial indices in Androids sqlite implementation (making a DB based store clumsy and slow). If Androids sqlite is one day updated to include the support, then we might reconsider.

simonpoole avatar Sep 09 '21 22:09 simonpoole

Having done some further checking, the following (overlay) sources need correction, too:

Lee-Carre avatar Sep 09 '21 22:09 Lee-Carre