[OSM-talk] How to perfect the map

[Robert (Jamie) Munro]

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Lars Aronsson wrote:
| All the wiki pages on "map features" describe how to add
| denomination to an amenity=place_of_worship, but don't say when
| a church should be drawn as a dot amenity or when the outlines of
| the building (and surrounding park) should be mapped in detail. I
| think we should make wiki pages that start with real world objects
| instead of tags.

IMHO, the outlines of all buildings and parks etc. /should/ be mapped in
detail, but won't be because that's too much effort for most mappers.
Marking the building with just a node is better than leaving it off the
map, and good enough for most uses of the data.

I have only found it possible to measure a building outline based on
aerial imagery - I've not managed to get a good enough image from a GPS.
I'm hoping that one day, video mapping (using match-moving as well as
GPS) may help.

http://en.wikipedia.org/wiki/Match_moving
http://en.wikipedia.org/wiki/Structure_from_motion

See also PTStereo (http://www.panotools.org/)

Robert (Jamie) Munro
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