[Talk-us] Arkansas state road data "Open The Data"
jamesmikedupont at googlemail.com
jamesmikedupont at googlemail.com
Tue Aug 17 02:49:26 BST 2010
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?
On Tue, Aug 17, 2010 at 3:23 AM, Mike N. <niceman at att.net> wrote:
> Learon Dalby gave a talk at US State of the Map regarding road centerline
> data. For slides of the presentation, see
> 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:
> 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...
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James Michael DuPont
Member of Free Libre Open Source Software Kosova and Albania
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