[Talk-us] The Greening of Georgia

[Dale Puch]

I don't know if this is where the data set came from, but it looks like it.
http://csat.er.usgs.gov/statewide/downloads.html
Under landuse/landcover It looks like this is probably either the level 1 or
level 2 data.

On Wed, Feb 25, 2009 at 2:42 PM, Theodore Book <tbook at libero.it> wrote:

> I think the issue is more that the data is somewhat out of date - I
> believe it is tagging the land use, not the presence of trees.  In some
> areas, however, especially around Atlanta, the land has been developed
> since the photography was taken on which the dataset is based.  That
> will take some correction by hand.  Georgia does have a lot of land that
> is devoted to forestry use - timber is Georgia's largest agricultural
> product.
>
> TB
>
> Dale Puch wrote:
> > It looks like the use of landuse forest is a quite a bit more than makes
> > sense or is of use.  Yea there are lots of trees where it is shown, but
> > that includes subdivisions with a lot of trees still.
> > The USGS data seems to be more the type of trees, not the "state" of the
> > trees as a forest.
> > As an example, look at the map and try to show where designated national
> > forests are.
> >
> > Personally I think the import is ok if the tags were adjusted more.
> > Forest should only be used if it is the primary landuse, or
> > federal/state claimed forest.
> >
> > Dale
> >
> > On Wed, Feb 25, 2009 at 2:42 PM, Theodore Book
> > <tbook at libero.it
> > <mailto:tbook at libero.it>> wrote:
> >
> >     Dear Adam,
> >
> >     Trunk roads are major roads which are not necessarily limited access.
> >     Generally, they are divided roads with higher speed limits and some
> >     direct access.  They would tend to fall between motorways and primary
> >     roads in importance.
> >
> >     TB
> >
> >     Adam Schreiber wrote:
> >      > Also, what's with the trunk roads?  Trunk is supposed to be
> >      > hierarchically above motorway, which is what interstates are
> tagged
> >      > with and trunk is being applied to limited access US Hwy's?
> >      >
> >      > Adam
> >      >
> >      > On Wed, Feb 25, 2009 at 8:59 AM, Theodore Book
> >     <tbook at libero.it
> >     <mailto:tbook at libero.it>> wrote:
> >      >> Yes, It is USGS Landuse / Land Cover data.  It is 1:100k or
> 1:250k
> >      >> resolution, and also slightly dated.  I find it to be pretty good
> >      >> through zoom 14 or so, (see for example:
> >      >>
> >
> http://www.openstreetmap.org/?lat=34.4717&lon=-84.4287&zoom=14&layers=B000FTF
> >     <
> http://www.openstreetmap.org/?lat=34.4717&lon=-84.4287&zoom=14&layers=B000FTF
> >)
> >      >> but there is some offset, especially around the Atlanta area,
> >     that will
> >      >> take some manual correction.
> >      >>
> >      >> Adam Schreiber wrote:
> >      >>> On Tue, Feb 24, 2009 at 11:42 AM, Ian Dees
> >     <ian.dees at gmail.com
> >     <mailto:ian.dees at gmail.com>> wrote:
> >      >>>> On Tue, Feb 24, 2009 at 10:31 AM, Adam Schreiber
> >     <sadam at clemson.edu
> >     <mailto:sadam at clemson.edu>> wrote:
> >      >>>>> Has anyone else noticed some kind of import of park/forest
> >     data for
> >      >>>>> Georgia going on?  Does anyone know that source of the data?
> >      >>>>>
> >      >>>>>
> >
> http://openstreetmap.org/?lat=34.043&lon=-84.233&zoom=9&layers=B000FTF
> >     <
> http://openstreetmap.org/?lat=34.043&lon=-84.233&zoom=9&layers=B000FTF>
> >      >>>> Looks like OSM user "Liber" is uploading it.
> >      >>>>
> >      >>>> http://openstreetmap.org/user/Liber
> >      >>>>
> >      >>>> We need to be careful when uploading data like this that is
> >     very low
> >      >>>> resolution. As you zoom in closer, you can see that it loses
> >     meaning around
> >      >>>> zoom 9, which means it was probably a 1:1M or so resolution.
> >     Usually my
> >      >>>> cutoff is at 1:24K.
> >      >>> I have sent Liber a message via the website.  Hopefully, we'll
> find
> >      >>> out what's going on.
> >      >>>
> >      >>> Cheers,
> >      >>>
> >      >>> Adam
> >      >>>
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> >
> > --
> > Dale Puch
> >
> >
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-- 
Dale Puch
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