Re: [Talk-us] NYC building details
Colin - You're essentially describing OpenStreetMap's standards. Of course we don't have the imagery you used for digitization but we should make at least sure to stick to tracing footprints, not rooflines. I'll drop the user robgeb who created the changeset in question a friendly note to make sure he's seen your message here. He's been a lot of the amazing 3d modelling you can see in in my last diary post [1] - I'm sure he'll touch many more buildings. Alex [1] http://www.openstreetmap.org/user/lxbarth/diary/23588 On Thu, Sep 18, 2014 at 11:12 AM, Reilly, Colin crei...@doitt.nyc.gov wrote: Not sure what the OSM standard for building geometries or if there is one. In the case of NYC, the buildings that were provided by NYC DoITT and imported to OSM were digitized using imagery of higher resolution than what is available to OSM editors (wish we could make the imagery available but unfortunately we cannot). In addition, the NYC buildings are digitized to the base of the building not to an upper recess. We’ve seen editors modifying buildings to lower resolution imagery and to upper recesses. See example below where an editor changed the outline on the west side of the building to conform to an upper recess of the building. Would be nice to figure out a way to prevent degrading the fidelity of the building geometries or fixing on a standard. Apologies if there already is one. http://www.openstreetmap.org/way/250052753/history Colin Reilly Director, Geographic Information Systems New York City Department of Information Technology Telecommunications ___ Talk-us mailing list Talk-us@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-us ___ Talk-us mailing list Talk-us@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-us
[Talk-us] Whole-US Garmin Map update - 2014-09-17
These are based off of Lambertus's work here: http://garmin.openstreetmap.nl If you have questions or comments about these maps, please feel free to ask. However, please do not send me private mail. The odds are, someone else will have the same questions, and by asking on the talk-us@ list, others can benefit. Downloads: http://daveh.dev.openstreetmap.org/garmin/Lambertus/2014-09-17 Map to visualize what each file contains: http://daveh.dev.openstreetmap.org/garmin/Lambertus/2014-09-17/kml/kml.html FAQ Why did you do this? I wrote scripts to joined them myself to lessen the impact of doing a large join on Lambertus's server. I've also cut them in large longitude swaths that should fit conveniently on removable media. http://daveh.dev.openstreetmap.org/garmin/Lambertus/2014-09-17 Can or should I seed the torrents? Yes!! If you use the .torrent files, please seed. That web server is in the UK, and it helps to have some peers on this side of the Atlantic. Why is my map missing small rectangular areas? There have been some missing tiles from Lambertus's map (the red rectangles), I don't see any at the moment, so you may want to update if you had issues with the last set. Why can I not copy the large files to my new SD card? If you buy a new card (especially SDHC), some are FAT16 from the factory. I had to reformat it to let me create a 2GB file. Does your map cover Mexico/Canada? Yes!! I have, for the purposes of this map, annexed Ontario in to the USA. Some areas of North America that are close to the US also just happen to get pulled in to these maps. This might not happen forever, and if you would like your non-US area to get included, let me know. -- Dave ___ Talk-us mailing list Talk-us@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-us
