Its too cold outside today, so I stayed at home.

To my surprise the Mapnik-Tiles were online soon after i made some changes, very nice, i like the apperance.

This week a have seen some high-voltage power lines, so I mapped them via extrapolation. With an other sight of these lines last week I had three points to extrapolate.
Today i wondered, were these power-lines come from, and to were they go, luckily the hi-res-Yahoo-Satellite-Images were avaliable in this region, and so I ended up spending half the day mapping power-lines with ca. 460 power-towers in the region around cologne. (there are a lot of un-mapped towers left, if anyone likes to continue...)

I just imagine, mapping those via physical presence and GPS, this would take very long, Even with some old-school trigonometry, this would take a long time, with the satellite it is a matter of seconds.
e.g.
sub_station in Sechtem https://wiki.openstreetmap.org/wiki/Tag:lat=50.79556 https://wiki.openstreetmap.org/wiki/Tag:lon=6.97661
Unfortunately the hi-res-yahoo-images are not available everywhere.

Just one thing about the JOSM-icon for power-towers: please clean that up. This fat white icon is much too present. Especially in low zoom levels i see fat white paths of high-voltage-lines around cologne. The icons e.g. for train station, suburbs, villages are tiny compared to this, and train-stations are unique while the power-towers come in a long periodic row.
I suggest a small and thin, mostly transparent icon.

One more ...
the emergency-telephone to call the police or fire-brigade
ColinMarquardt suggested to use amenity=telephone, access=emergency
(thanks)
I also started to map those telephones this way.
Furthermore i map public coin or card-telephones with access=public.