thanks for sharing this. I was looking into the lake norfork mapping, there is very little there. are the lakes and rivers of AR also in this dataset? mike
On Tue, Aug 17, 2010 at 3:23 AM, Mike N. <[email protected]> wrote: > Learon Dalby gave a talk at US State of the Map regarding road centerline > data. For slides of the presentation, see > > http://www.slideshare.net/learondalby/open-the-data > > My summary is that he has gathered each county's GIS data over a period of > time and now has the entire state's data with a license (PD?) that allows > importing into OSM. I haven't looked in detail at the Arkansas TIGER data, > but it was likely gathered before all roads had been assigned names. > Possibly the TIGER geometry is not as good as the current data from the > counties. The proposal is > > 1.) Use the GIS road centerline data to replace untouched TIGER data in > OSM across the state of Arkansas. > 2.) Establish a system to allow updates to the multiple databases over > time - not necessarily an automated 'sync operation', but a bidirectional > feed of changes. OSM changes within an area would be fed back to the state > GIS, then on to the county GIS where they would decide to use it if > applicable. County changes would propagate back to OSM in the form of > some type of change set that someone could review and apply to OSM data if > applicable. In OSM terms, this would include the edits that break a way > into many smaller ways for bridges, speed limits, lane counts, traffic > lights, surface, sidewalk attributes, public transportation routes, etc. > > In the possibly similar case of Massachusetts, I cannot tell from the wiki > whether they used the state centerlines instead of TIGER, or if they had > replaced TIGER with MASSGIS data. > > It is of utmost importance to preserve any roadways touched by a human > mapper. In AR, these roads consist of mostly Interstates and US highways > that have been fixed up for proper routing and relations. To a lesser > extent, some edits are from the attack of the duplicate node bots near > county borders. I did a study for the state of Arkansas to determine how > many roads have been touched so far: > > https://spreadsheets.google.com/ccc?key=0AtqECyNeMFlGdF9PTl8yR1dVdzJUZERyMEZtcG5sT0E&hl=en > > For purposes of this study, I have treated the Un-abbreviation bot edits as > unedited, if version=2. The Un-abbreviation bot can be run again later if > necessary, or applied to the incoming AR GIS data before importing it. > > Note that there are 3 worksheet tabs on the bottom of the spreadsheet. > There is one active mapper in the city of Little Rock; he has touched many > roads as he has improved the map in that area. Carl Anderson gave an > excellent talk on their experience in importing county GIS data in some of > the Atlanta region. Based on his experience, it is unlikely that the > entire process can be automated. It will be some form of manually deleting > the unedited TIGER ways, then stitching the AR GIS data to any existing > edited roads. Most roads have not been touched, so remote, unedited > counties would import with less labor. Any techniques used here could be > applied to other states with PD road centerline data. > > This is the limit of my knowledge - I have no experience with the tools > Carl mentioned that can assist with importing data into an existing system, > and I haven't looked at the AR GIS data to see what other challenges may lie > ahead. So I'm passing the ball to the next data import enthusiast... > > > > > _______________________________________________ > Talk-us mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-us > -- James Michael DuPont Member of Free Libre Open Source Software Kosova and Albania flossk.org flossal.org _______________________________________________ Talk-us mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-us
