Thanks Mike, I already have the planet files from Cloudmade. They don't have historical data, just the current data.
Unless I can automatically trace behavior, like deleting GNIS nodes entirely and replacing them entirely with a polygon, I will just be documenting it as anecdotal. One of the problems, I think with machine tags, like gnis:featureid=xxxx, is that they cluttered up the old editing interfaces like Potlach 1. Potlatch 2 can put those tags in a separate tab. I'd even like to see Potlatch 2 be able to not display specified tags or make them read-only. The great thing about tagging is that you can have data that participates in multiple schemata simultaneously. As you mentioned, you need to keep those tags to enable two-way data flow. -Eric On Fri, Feb 25, 2011 at 11:35 AM, Mike N <[email protected]> wrote: > On 2/25/2011 1:07 PM, Eric Wolf wrote: >> What I'm trying to do is look at changes to the USGS GNIS data in OSM. >> I want to convert node data for the US (probably just the lower 48 >> states) into a format that I can work on in ArcGIS. I want to have >> access to historical data. > > Check into starting with the North America extract from Cloudmade: > http://downloads.cloudmade.com/north_america/united_states > > Also, adding to What Ian said - > > - In many cases, I remove xyz(historical) since the feature no longer > exists OSM doesn't have a good way to represent historical data. That > doesn't mean that the original GNIS data was invalid. > > - In a number of cases where I created a polygon, I didn't copy the > original GNIS tags when I deleted the node. That was before I realized the > value of the tags for 2-way data exchange. > > _______________________________________________ > dev mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/dev > _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/dev
