On Mon, Apr 2, 2012 at 6:58 PM, Kate Chapman <k...@maploser.com> wrote:
> I personally find [building footprints] makes the map far more usable > for adding other information. > the coastal-swath NOAA LIDAR footprints imported is MASS are wonderful. (Especially in Stamen watercolor tiles, but also in TopOSM render too. ) A Buildings layer is most useful if they're ubiquitous, not here-and-there when interesting. As GPS mapping of individual houses is not accurate without professional differential GPS -- 10m accuracy means i can't be sure which corner of my house is which ! -- the choices are bulk imports or tracing compatible imagery. When NOAA or a state has paid for LIDAR scans and auto vector conversion, using that is efficient, and we can better use volunteers to add value -- e.g. naming stores, as Kate says -- rather than doing rote manual vector extraction from imagery. There's quite enough for volunteers who *want* to do manual vector extraction from imagery to do without tracing every darned house and barn by hand! -- Bill @n1vux bill.n1...@gmail.com
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