[UW-GIS-L] data for the Burke
hgreen at u.washington.edu
Wed Jan 29 14:55:32 PST 2003
Your own http://wagda.lib.washington.edu/data/lulc250k/
(which is linked to the USGS)
comes close to their desired level of detail.
But what about the GAP landcover? Does that cover the state?
Yes, you can make contours on demand from the 10-meter DEMs,
but you must restrict yourself to 40-foot contours for most
areas. Otherwise, you will see garbage contours that reflect
strange interpolation in the creation of the DEMs from the
40-foot (at 10- and 20-foot in some areas) contours.
At the GRID prompt, it would look something like:
Grid: &setvar dem elv10 /* At least that's what I call my decimeter DEM
Grid: setwindow * %dem%
Grid: contours = contour(%dem%,INTERVAL,121.92) /* 121.92 decimeters = 40 feet
Ralph Haugerud wrote:
> I don't know about the limits of a single shapefile, but generally I think
> you are right.
> 1) Geology--WaDGER 1:100K coverages are the best thing going. (And are
> pretty cool--Washington is a leader in having fairly uniform state-wide
> digital geology coverage.) 50 some tiles, 1 for each 30x60 minute quad.
> They are in WAGDA (UW Restricted) and can be pasted together fairly
> easily. I have a version distributed by WaDGER late in 2002 that I could
> contribute to the library, if your version is not as current.
> 2) Land cover I know nothing about
> 3) Contours?! I've heard that we have statewide 10m DEMs because WaDNR
> discovered that it was impractical to work with large-area contour
> coverages. Indexing/clipping to get the part you want is simply too
> expensive. It's easier --if you must have contours-- to clip part of a
> grid and re-contour on the fly.
> Ralph Haugerud
> Geologist, U.S. Geological Survey
> USGS at University of Washington
> Dept. Earth and Space Sciences, Box 351310
> Seattle, WA 98195
> rah at geophys.washington.edu
> public-domain high-resolution
> topography for western Washington:
> Pacific NW geologic mapping project:
> On Wed, 29 Jan 2003, Aimee A. Pierce wrote:
>>I had a patron come in today interested in finding all sorts of base
>>data for Washington State. He is trying to improve GIS at the Burke
>>Museum. We have found some data, but he is hoping to find complete
>>shapefiles of geology, landcover and contours for the entrie state of
>>Washington-not shapefiles of sections of Washington. Is this type of
>>information available? It seems to me this type of data would be too
>>large to put in a single shapefile, and while I have found the little
>>section shapefiles I cannot find a larger state shapefile. Am I
>>correct in my assumption or am I missing some leads? The information
>>I have found seems to be too general in detail for what he is looking
>>for. He would be interested in scales from 1:24,000 to 1:200,000.
>>Thanks for any help.
>>Aimee A. Pierce
>>GIS Assistant, Map Library
>>University of Washington
>>aimeeap at u.washington.edu
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hgreen at u.washington.edu 162 Johnson Hall 206-685-7981
University of Washington
Department of Earth and Space Sciences
63 Johnson Hall (Box 351310)
Seattle WA 98195-1310
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