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NYPL does a lot of great open source mapping work. They also funded an open source raster map warper that I've forked. http://maps.nypl.org/warper/
I literally love that map warper! You can upload your own images at mapwarper.net as well.
This is pretty cool. A lot of manual work on OSM, back when I was with some OSM nerds in DC, faced the problem of manual imports and a tool like this would have been very, very useful. Thank you NYPL!
OSM's been pretty hardcore about their no import policy because of accuracy issues in validation. They want to map these places themselves and don't want to trust others for accuracy, let alone the legal issues that come with importing data (ugh). We, however are far more lenient (mostly because we can't afford to build a time machine to map the past ourselves). On the other hand, Mike Migurski's Green Means Go [1] p…
That being said, thank you for throwing this up for the uninitiated. Some of the emails to the OSM-main and OSM-US list were hilarious, like people populating entire country-worth datasets. Boy, did people yell at them.
http://wiki.openstreetmap.org/wiki/Washington_DC/DCGIS_impor...