[Talk-us] Wilderness Data
mikel_maron at yahoo.com
Mon Feb 25 04:33:40 UTC 2013
Thanks for the good work. I'm also interested in mapping wilderness and wildlife reserves. Started off myself after visiting Dolly Sods Wilderness last year.
I was curious to see how the USFS data compared to what's already in OSM. I downloaded the entire wilderness shapefile, removed everything but Dolly Sods using QGIS, and reprojected to 4326; then loaded the shapefile in JOSM (thanks for prompting me to look at the OpenData plugin), and downloaded the reserve boundary from OSM.
The boundaries are pretty similar, but differ in a few points, no more than 10 meters. Some sections from the USFS have much higher fidelity (ie more nodes). It seems clear that there are two different sources for the boundary out there, and I'm not sure which one was used in 2012 when Dolly Sods was added (http://www.openstreetmap.org/browse/way/175643411/history). Will send a message to that editor inquiring.
A question on tags. Why is boundary=national_park suggested in the wiki on the USFS page? I've used boundary=protected_area for Dolly Sods.
You're probably aware of the NPS use of OSM. If not definitely check out what they're doing.
Just had a thought.
Wouldn't it be amazing to map/visualize/analyse every single park, recreation area, preserves and reserves in the US? From National Parks, down to neighborhood dog runs.
How are possibilities like this managed on OSM US tile servers?
* Mikel Maron * +14152835207 @mikel s:mikelmaron
> From: stevea <steveaOSM at softworkers.com>
>To: talk-us at openstreetmap.org
>Sent: Monday, February 25, 2013 5:51 AM
>Subject: Re: [Talk-us] Wilderness Data
>A significant subset of the fresh data published on the aforementioned US Forest Service (USFS) site (National Forest and Wilderness boundaries, others are available) were successfully transformed from NAD83/shapefile to WGS84/.osm. (Thanks to all who made technical suggestions -- they worked!). Results from data at this site are nationwide. Both National Forest and Wilderness boundary sets yield huge files: each is hundreds of megabytes, unwieldy on most JOSM desktops. So, any US Contributor could do the same, then "regionalize" these data into smaller chunks: recommended both for JOSM performance reasons and to "share the load" among OSM community. If you wish to follow my ten step technical data transformation, which takes nationwide data sets (for forests, wilderness...) and successfully isolates single forests or wilderness areas while respecting multipolygon memberships, I am happy to send you my workflow.
>A wiki page tracks this effort: http://wiki.openstreetmap.org/wiki/US_Forest_Service_Data. I encourage US Contributors to compare their local/current OSM state of National Forests and any contained Wilderness areas with these data, and to become aware of any OSM community that may be importing them. If so, offer a heads up that these new data are available -- and your thanks. If not, feel free to contribute these USFS data to OSM yourself!
>I am starting this in USFS Pacific Southwest Region 5, (California), a staggering 20 million acres (8 million hectares) of forest. My first case was with Los Padres National Forest, an area stretching nearly half the state, 48% of it containing ten distinct wilderness areas. The good news: this "first seed is planted" using these new USFS data, and mapnik/standard rendering is presently occurring. I now move on to Angeles, Cleveland and San Bernardino National Forests (and their wilderness area subsets), then I intend to complete Region 5's eastern and northern National Forests: 1 down, 3 to do now, 15 more to go: whew!
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