A few months ago I tried to get a GPS trace of the Bratsbergbanen railway ( http://en.wikipedia.org/wiki/Bratsbergbanen) between Notodden and Skien (in Norway). I didn't switch on the GPS until I had boarded the train, which was a bad idea. Due to the poor reception inside the train the GPS couldn't get a position fix.

On the norwegian OSM-mailing list I got a tip that the GPS would propaby be able to keep the satellite lock if I switched it on before entering the train. A few weeks I got the opportunity to try this. This time I got a good track from Notodden to Skien which I have used to update to OSM data.

During this I discoved a somewhat annoying feature of my GPS (Garmin 60CSx). It will continue to log trackpoints in a straight line when losing satellite reception. This means that it's very hard to locate short tunnels or the start of longer tunnels in the tracklog (unless I managed to hit the mark-button in time). There appears to be no way to disable this feature.

During the autumn and winter I've ridden every street in Kongsberg on my bike and traced them with a GPS. The town and its surrounding residential areas should now be fairly complete.

There are still lots of details to fill in. Cold temperatures (-15°C) and snow somewhat limits mapping expeditions at the moment.

For the summer I plan to map paths/trails around town and also roads in more rural areas.

I have spent the last two months biking around around Kongsberg and collecting GPS traces. Streets in the town center should be fairly complete. Most of the residential streets west of the river is done, but there are still some missing in the Skavanger and Saggrenda areas.

I have startet mapping residential streets east of the river, however there are a lot of work to do. Could use som help from other mappers in Kongsberg :)

My long term goal for the Kongsberg area is to map tracks/trails/paths around town and classify them for hiking and mountain biking (singletrack).