[UW-GIS-L] towards a critical areas coverage: hydrography,
hazardous slopes by WA state?
Steven.Rentmeester at noaa.gov
Mon Aug 7 13:53:51 PDT 2006
WA DNR maintains a landslide inventory for the state, a slope stability
layer, and the state 1:24k hydrography layer.
Steve Hyde wrote:
> Looking for advise and data. Thanks in advance...
> *What are we doing?:*
> We are conducting an economic impacts forecast for Initiative 933 (the
> Property Fairness Initiative) that will be on the November ballot. We
> want to better understand the potential fiscal impacts on State,
> County and local governments. We are using GIS to better understand
> the geography of "critical areas" on private lands in Washington State
> so that we can estimate how much money I933 will cost State taxpayers.
> *What have we done?:*
> We have conducted a land cover analysis that has produced estimates
> of acreages of private and non-private ownership for forested and and
> agricultural lands by county. (both inside and outside urban growth
> *What we need to do?*
> We need to overlay "Critical Areas" as specified by each county
> "critical area ordinance" so that we can better understand the
> geography of private lands that are regulated under the critical areas
> ordinance. It is our understanding that a "critical areas" coverage
> does not exist for Washington State so we are planning to build one by
> combining the hydrography data referenced below into a comprehensive
> coverage of the State - then clip the stream networks and wetlands by
> county so that we can apply the buffer distances for each county
> ordinance. In addition to hydrography we plan to create a hazardous
> slopes coverage by calculating steep slopes from the WA State DEM.
> (Critical Areas are primarily composed of hazardous slopes and
> hydrography buffers)
> *NOTE:* (we have been in contact with County GIS organizations and
> some have shared critical areas data and others want $$$)
> *Does anyone have a comprehensive coverage of hydrography for
> Washington State?* The best data we have found is from:
> http://hydro.reo.gov/data.html The problem is the data is not
> aggregated by State or County. We are planning to create a
> comprehensive coverage from these files. If someone has already done
> this and willing to share the data, please let us know.
> *Does anyone have a hazardous slopes coverage for Washington State?*
> Again, thanks in advance for any suggestions anyone might have.
> Stephen Hyde
> Graduate Student, GIS Instructor UWOE
> Department of Geography | UW, Seattle
> Box 353550 | Office Smith Hall 417
> phone: 206.724.7929
> Uw-gis-l mailing list
> Uw-gis-l at u.washington.edu
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