Re:Without even knowing: the HN post I missed
by tmarthal on Monday March 18, 2013 @09:25PM
(#5398345)
It's interesting that you mention custom mapmaking. Google provides a similar service - creating a KML file hosted from a Google Spreadsheet. Here is the newest version: http://www.google.com/earth/outreach/tutorials/spreadsheet.h...
I've recommended it to a non-technical family member (he's a realtor) and they were able to create and host their own kml-based maps within an hour's time. Note that it does not use polygon based building markers, but rather addresses (and coordinates), which are simpler for non-GIS people to use.
OSM is rightfully skeptical of uploads. Even when cities give specific permission to OSM, it's up to the community whether a large import is helpful or risks drowning out local mappers. If anything, this site would be helpful to download a subset of the city's buildings as KML and use JOSM to upload.
This site exists as a custom mapmaker. It's easier for a non-GIS user to get data out and make custom maps compared to OSM APIs and tiles.