On 11/12/2009, at 8:02 PM, Elizabeth Dodd wrote:
> so we don't need imported data?

In most cases we don't need imported data, but it can be useful. For example 
rather than painstakingly crafting the entire coastline of Australia from a few 
GPS traces and a lot of imagery (much is relatively inaccessible), we can 
import it from someone's dataset and spend that large amount of time doing 
other things to improve OSM that we can't import data for.

There are also some things where importing external datasets is the *only* way 
to get it into OSM. For example boundaries of areas that have no physical edge, 
just a (not necessarily straight) line on someone decided on at some point in 
time.

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