Extracting regions from planet.osm ?

I’ve been using Merkaartor on LInux for some years. Usually I import a track, zoom in, then use “download more” to download OSM for that region. Bu...

GPS track "eye" effect in trees

On a couple of occasions I’ve noticed what I call an “eye” effect when plotting a GPS track through trees. The first time, I walked back and forth ...

How can I get accurate locations in a forest ?

I’m trying to improve the accuracy of the mapped features in Smoke Bluffs Park in Squamish. This is a very popular rock-climbing area with many doc...

Visibility of ski runs

I was skiing at Silver Star Mountain (BC Canada) using Maemo Mapper, which downloads the OS tiles. The ski lifts were marked, and a couple of ski r...