Data format: SDE Feature Class
File or table name: SBCSDE.GIO.overlay_flood_hazard
Coordinate system: Lambert Conformal Conic
Theme keywords: Flood Hazard Overlay
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Data format: SDE Feature Class File or table name: SBCSDE.GIO.overlay_flood_hazard Coordinate system: Lambert Conformal Conic Theme keywords: Flood Hazard Overlay |
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Abstract:
Flood Hazard Overlay for zoning and land use, essentially representing the 100-year flood area as adopted by the Santa Barbara County Board of Supervisors |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Flood Hazard Overlay for zoning and land use, essentially representing the 100-year flood area as adopted by the Santa Barbara County Board of Supervisors
To provide a digital version of the official countywide flood hazard overlay area.
This layer was originally created by merging the 2005 Final DFIRM 100-year flood layers with the HEC-II flood data from the Orcutt Community Plan (within the Orcutt Community Plan, the Flood Hazard Area is defined as the greater extent of the FIRM maps and the HEC-II (Flood Control District) maps; see page 201 of the Orcutt Community Plan). The HEC-II data was heads-up digitized using digital flood control topo, but only in areas where the HEC-II flood extended beyond the DFIRM 100-year flood extent. This was done in Autocad, and then exported into ArcGIS and merged with the DFIRM. The polygons were then dissolved so that there is only one class of flood area (rather than separate classes of adjacent polygons within the 100-year flood zone). This was done to simplify the feature for use in photomapper and other applications. For the more detailed classifications, see the original DFIRM data. Updated October 3, 2008 to reflect LOMR 07-09-0164P (San Ysidro Creek) Effective 10/25/07 and LOMR 06-09-BF87P (Atascadero Creek) Effective 12/6/07. Updated October 22, 2009 to reflect most recent version of DFIRM_NFHL layer (August 2009 shapefile from September 2009 folder in the Flood/DFIRM area of GIS_data). Only change was to lower portion of Romero Creek in Montecito (Case #08-09-0425P). Updated January 14, 2010 to add the portion of the previous Flood Hazard Overlay to the Rincon area where the boundary used by FEMA to map the flood zones was erroneous. This polygon does not line up well with the newer DFIRM data, but was added to show that the flood zones should extend beyond the fictional county line that FEMA used to draw the flood zones up to in the DFIRM maps. Shapefile was re-created March 4, 2010 in order to incorporate three more LOMR changes (Carpinteria Marsh, 08-09-1482P; Maria Ygnacio Creek, 09-09-2127P; and Alamo Pintado Creek, 09-09-0651P) and to include Flood Hazard areas along and adjacent to the County Boundary. We received a CD with the DFIRM data for the entire state which allowed for this to be done (prior data acquisitions were for only the area FEMA defined as Santa Barbara County, based on their version of the County Line which does not necessarily follow the County's version of the County Line). The new shapefile was created by extracting and dissolving the 100-year flood polygons from the Jan. 20, 2010 DFIRM release, including surrounding areas outside the County, adding back in two wedges along the upper Cuyama River near Ventucopa that had been mapped previously (probably removed because they are in LPNF), and then substituting back in the Flood Hazard Areas for Orcutt which were created as described above following the methodology defined in the Orcutt Community Plan. There were no changes in the Orcutt area to the DFIRM mapping in the Jan. 2010 DFIRM data. Note that there is one discrepancy in the upper Orcutt Creek area around Key Site 3, where a previous DFIRM mapping update was NOT mapped into the Flood Hazard Area because the data was deemed inaccurate based on an inspection using Flood Control topo (LOMR case numbers 06-09-B833P & 07-09-0251X). In this area we have kept the original mapping that was done based on the Orcutt Community Plan methodology.
DFIRM publication date
Dataset copied.
Metadata imported.
Metadata imported.
Internal feature number.
ESRI
Feature geometry.
ESRI
County of Santa Barbara Planning & Development
Mapping
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