view ZoneDetect.md @ 2865:cb5326e72117

Ref #631: Compilation script for all distributions https://github.com/BestImageViewer/geeqie/issues/631 Reference to all-distros script included in README. Full list of dependencies still not included.
author Colin Clark <colin.clark@cclark.uk>
date Sun, 18 Nov 2018 17:38:10 +0000
parents 8bab8ac8ade0
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The detection of timezone is performed by
 [ZoneDetect](https://github.com/BertoldVdb/ZoneDetect)
 
 timezone16.bin has a longitude resolution of 0.0055 degrees (~0.5km).  
 timezone21.bin has a longitude resolution of 0.00017 degrees (~20m).
 
 The safe zone result indicates how close you are to the nearest border (flat earth model using lat and lon as x and y), so you can know when to do a new lookup. If you don't need it you can ignore it, in this case you can pass a NULL parameter to save the (very small) calculation effort.
 
 
 Note that the [underlying database](https://github.com/evansiroky/timezone-boundary-builder) will change from time-to-time.