-* Cache map tiles in the indexedDB
-** Use an intelligent algorithm to automatically try (async) updating tiles if they have a certain age
-*** If they have changed, possibly also try (async) updates of other cached zoom levels covering this area
-** Clear cached tiles option
-* Show a notification when we are loading tiles or saved data
-* Display length and duration of track
-* Display movement speed
-* Display location accuracy
-* Show a better visible marker for the current location, possibly also indicating movement direction/speed
-* Support pinch zoom gestures
-* Smoother animations for panning
-* Smooth animations for zooming, probably using some canvas magic
-* Use available larger/smaller tiles with resizing as loading placeholders while zooming in/out
-* Full screen mode
-* Save GPX tiles to the web (OSM? Public cloud service? Private service?)
+* Improve tile cache:
+** If cached tiles have changed, possibly also try (async) updates of other cached zoom levels covering this area
+** Pre-cache tiles in adjacent areas and possibly zoom levels
+*** Feature to download all maps up to a certain resolution for some area around the current point
+* Improve texture cleaning algorithm
+* See if we can secure OSM login (investigate OAuth)
+* UI improvements (non-map):
+** Show a notification when we are loading tiles or saved data
+** Display movement speed
+** Display location accuracy
+** Find better UI for track length/duration display
+* Map/track display improvements:
+** Speed up track drawing:
+*** Only draw lines that are visible
+*** Reduce lines to draw by eliminating unneeded detail (based on zoom level)
+*** Make track drawing async and hooked up to requestAnimationFrame()
+** Show a better visible marker for the current location, possibly also indicating movement direction/speed
+** Smooth animations for zooming, probably using some WebGL magic
+** Use available larger/smaller tiles with resizing as loading placeholders while zooming in/out