[TCMUG] How do you match up two datasets?

[Ian Dees]

Hi TCMUG,

I've been pondering a way to help people import into OSM while respecting
the existing data. To that end, I'm wondering if anyone on the list could
talk about how they would go about applying one (newer, presumably better)
dataset to another. I'm thinking of the usecase where MetroGIS has old
street centerline data from 1990 and receives an update from 2010. How would
you go about doing that? What tools would you use and what are they called?

I'm envisioning a web map that allows you to view the new data as an overlay
on the existing data, marking whether or not to import each new feature and
how the import should happen (completely remove old stuff and replace with
new stuff, update the metadata on the old stuff with the new stuff, or
something else). However, when there are a gazillion things to import, it
might not make sense to do that one-by-one.

Thanks for your thoughts!
Ian
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