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iOS13 zooms more than OSM tiles #133

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merlos opened this issue Oct 24, 2019 · 0 comments · Fixed by #139
Closed

iOS13 zooms more than OSM tiles #133

merlos opened this issue Oct 24, 2019 · 0 comments · Fixed by #139

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@merlos
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merlos commented Oct 24, 2019

In iOS13, it seems Apple introduced the possibility of zooming more than the available OSM tiles (https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames)

Steps to reproduce

  1. Get source from iOS 13's dark mode support + bug fixes #125
  2. Compile and run the app
  3. Select Open Street Maps as tile server
  4. Zoom a lot...

At some point no tiles are displayed.

** Possible solution**

The issue may be solved by limiting the max zoom for each tile server:

  1. Add to GPXTileServer the max zoom for each source.

  2. Then calculate the current zoom (see https://github.com/merlos/MapCache/blob/master/MapCache/Classes/MKMapView%2BMapCache.swift)

  3. Limit max zoom
    https://stackoverflow.com/questions/1636868/is-there-way-to-limit-mkmapview-maximum-zoom-level
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Fixes issues with tiles in ios13 and cache size calculation merlos/iOS-Open-GPX-Tracker
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@merlos