Erin Korris ([email protected]) wrote:
Hello:
I am wondering if there is a rule to follow when tracing buildings
using aerial
imagery. On the default, Yahoo imagery, the buildings are slightly
displaced so
in addition to the roof you can see the foundation of certain sides of the
building. Should this be ignored and the building drawn based on the roof?
Thanks
This is a major issue when tracing tower blocks - the taller the
building the more the roof appears to be displaced relative to the
floor due to the perspective of the plane taking the photos. I have
always tried to map the base because, ultimately, a map is a
representation of what's at ground-level. If you mapped roofs you'd
get very tall buildings overlapping the surrounding roads.
--
Charlie
_______________________________________________
talk mailing list
[email protected]
http://lists.openstreetmap.org/listinfo/talk
