importing USGS landcover maps

classic Classic list List threaded Threaded
2 messages Options
Reply | Threaded
Open this post in threaded view
|

importing USGS landcover maps

Chris C Rewerts

Just when I have gotten used the process of importing USGS DLG files
to GRASS vector, I have a monkey wrench tossed into my machinery...
now I have some other format to deal with (for what I am guessing is land
cover data; a raster representation perhaps.)

So I call upon the collective expertise of this mailing list again
to help me out of the fog. Hopefully to someone this is a recognizable
situation. Below is the top 10 lines of one of the files. Can you tell
what it is? If so, how do I import to GRASS?

hat in hand,

Chris Rewerts ([hidden email])

"Speak up - what are you?"
"I'm ignorant"             - The Little Prince

------------------ top ten lines of mystery data file ---------------------
       575    942100       860    0  200    6   77   16    1   7874016      1978
    1    1  860  575    0  556   19    1  440   13  860   20  854  575  427  397
    400000    900000    410000    900000    410000    890000    410000    880000
    400000    880000    400000    890000    243900   4542900     86073
PEORIA, IL 1:250,000 QUAD LU PB CN HU FO SO
 16  247800 4542800          0     17095   7130005  1709510020000001002000000100
 16  248000 4542800          0     17095   7130005  1709510020000001002000000100
 16  248200 4542800          0     17095   7130005  1709510020000001002000000100
 16  248400 4542800          0     17095   7130005  1709510020000001002000000100
 16  248600 4542800          0     17095   7130005  1709510020000001002000000100

Reply | Threaded
Open this post in threaded view
|

Re: importing USGS landcover maps

Kenn Gardels

> From: [hidden email] (Chris C Rewerts)

> Subject: importing USGS landcover maps
>
>
> ... I am guessing is land
> cover data; a raster representation perhaps.)...
>
This is GIRAS vector data.  I just got a diskfull of the stuff myself,
and havn't figured out how to process it.  I do have documentation
about it, and the somewhat arcane details of the file format.  (Chris, I
can fax you the relevant pages if you want.)  If someone knows about a
GIRAS-to-anything, please let the list know.

There is a GIRASARC command in arcinfo, which I may wind up doing, and then
ungenerating to get to GRASS, but (a) not everyone around has arcinfo (ahem),
and (b) that's cheating.

-kenn gardels
UCB/CEDR, 510-642-9205, [hidden email]