This is a Vector data set. It contains the following vector data types (SDTS terminology):
The map projection used is NAD 1983 HARN StatePlane Colorado North FIPS 0501.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.0003280833333333334
Ordinates (y-coordinates) are specified to the nearest 0.0003280833333333334
Planar coordinates are specified in foot_us
The horizontal datum used is D North American 1983 HARN.
The ellipsoid used is GRS 1980.
The semi-major axis of the ellipsoid used is 6378137.0.
The flattening of the ellipsoid used is 1/298.257222101.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
FEMA (Federal Emergency Management Association), Boulder County Transportation
FEMA DFIRM floodplain and floodway for Boulder County, incorporated and unincorporated.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- This data supercedes all previous flood data for Boulder County.
It is public information and open for all to use for display and analysis.
Effective December 18, 2012, all flood related decisions will be regulated based on this DFIRM.