Thread: GPS Advice
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Old 04-25-2017, 10:34 AM   #20
Trail Boss
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It may take several days, if not weeks, for changes to appear in all derivations of OpenStreetMap (like TF Outdoors, OpenCycleMap, etc).

LoMaps indicates the date when the map was generated and, no, it isn't created the moment you purchase the map. All offline maps have a "shelf life" and eventually need to be replaced with fresher versions. This is true for all downloaded or cached maps.

If you record a GPS track, I'll definitely use it to perform a "sanity check" on the trails I've created. The more data, the better. For example, I recently updated the trail to Lyon Mountain. I used two tracks I recorded plus ten I downloaded from Wikiloc. I used several maps:
NYS GIS Ortho Imagery
USGS TNM Hydrography
US Topo 7.5'
Bing aerial
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