More information
Getting more help and information
Metadata
The metadata for the datasets used in this application is available at
http://www.buncombecounty.org/governing/depts/GIS/dataDownload_Disclaimer.asp
Understanding Slope
Slope identifies the steepest downhill slope for a location on a surface. The lower
the slope value, the flatter the terrain; the higher the slope value, the steeper
the terrain. The slope can be calculated as percent slope or degree of slope.
When the slope angle equals 45 degrees, the rise is equal to the run. Expressed
as a percentage, the slope of this angle is 100 percent. As the slope approaches
vertical (90 degrees), the percentage slope approaches infinity.
Slope Tool Model
The natural average slope is calculated using the following formula:
Where:
S = Average natural slope of parcel in percent
I = Contour interval of map in feet, with said contour intervals to be five feet or less
L = Total length of the contour lines within the parcel in feet
A = Area of the parcel in acres
0.0023 = Constant which converts square feet into acres
A graphic of the data model is available at:
Link
Links
Buncombe County
Buncombe County GIS
Buncombe County Planning
Buncombe County Ordinances
City of Asheville
The University of North Carolina at Asheville
The National Environmental Modeling and Analysis Center (NEMAC)
The Renaissance Computing Institute (RENCI)
ESRI