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Detailed Analysis Unit-DAUConvergence via County Boundary cnty24k09, (*See metadata for cnty24k09, Cal-Atlas), State of California.
The existing DAU boundaries were clipped via Cal-Atlas cnty24k09 by Michael L. Serna, NRO via ArcMap 10.1. DAU’s were sent out to: Northern Region Office (NRO), North Central Region Office (NCRO), South Central Region Office (SCRO) and Southern Region Office (SRO) respectively.
Collaboration was by Department of Water Resources, Region Office personnel, Michael L. Serna, NRO, Jason Harbaugh - NCRO, Cynthia Moffett - SCRO and Robert Fastenau - SRO with the final merge of all data into a cohesive workable dataset completed by Michael L. Serna - NRO, Land and Water Use Section.
Existing DAU feature class boundaries contained a multitude of variant sliver acreages along all DAU and county boundary lines through-out the State of California.
Each region office was sent their respective ‘clipped’ features where they ‘exploded’ each county to expose the DAU’s sliver anomalies. They subsequently merged the variant slivers into the proper DAUs. Upon completion, the DAU feature classes were sent back to Michael L. Serna, NRO where they were merged back together, ‘Unioned’ to the cnty24k09 State Boundary and ‘exploded’ to expose DAU/State of California boundary slivers. These features are reachable by County\DAU. This allows the county boundaries, the DAU boundaries and the State of California Boundary to match Cal-Atlas cnty24k09.
NAME_PCASE | = | County Name Upper\Lower Case |
NAME_UCASE | = | County Name Upper Case |
FMNAME_PC | = | Name Upper\Lower Case - County |
FMNAME_UC | = | Name Upper Case - County |
ABBREV | = | County Abbreviation |
ABCODE | = | Code |
ISLAND | = | Yes\No |
PERIMETER | = | Perimeter |
ACRES | = | Acres |
DAU_CODE | = | Detailed Analysis Unit Code |
DAU_NAME | = | Detailed Analysis Unit Name |
PSA_CODE | = | Historic Planning Area code |
PSA_NAME | = | Historic Planning Area Name |
HR_CODE | = | Hydrologic Regions |
HR_NAME | = | Hydrologic Names |
DAUID_CODE | = | Identification Code |
PA_NO | = | Planning Area |
PA_LABEL | = | Planning Area Label |
IslandName | = | Island Name |
VxCount | = | Vertex Count |
X_COORD | = | Coordinate |
Y_COORD | = | Coordinate |
Region | = | DWR Region |
FIPS | = | Code DAU |
Region_Abrev | = | DWR Region Abbreviation |
Shape_Length | = | Length |
Shape_Area | = | Area |
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cnty24k09_1_poly metadata Summary:
Ideally, state and federal agencies should be using the same framework data for common themes such as county boundaries. This layer provides an initial offering as "best available" at 1:24,000 scale. Additional improvements, including a review of data sources for the coastline, can be added over time based on interagency review and agreement on proposed changes.
cnty24k09_1_poly metadata Description:
In late 1996, the Dept of Conservation (DOC) surveyed state and federal agencies about the county boundary coverage they used. As a result, DOC adopted the 1:24,000 (24K) scale U.S. Bureau of Reclamation (USBR) dataset (USGS source) for their Farmland Mapping and Monitoring Program (FMMP) but with several modifications. Detailed documentation of these changes is provided by FMMP and included in the lineage section of the metadata. A dataset named cnty24k97_1 was made available (approximately 2004) through the California Department of Forestry and Fire Protection - Fire and Resource Assessment Program (CDF - FRAP) and the California Spatial Information Library (CaSIL). In late 2006, the Department of Fish and Game (DFG) reviewed cnty24k97_1. Comparisons were made to a high-quality 100K dataset (co100a/county100k from the former Teale Data Center GIS Solutions Group) and legal boundary descriptions from ( http://www.leginfo.ca.gov ). The cnty24k97_1 dataset was missing Anacapa and Santa Barbara islands. DFG added the missing islands using previously-digitized coastline data (coastn27 of State Lands Commission origin), corrected a few county boundaries, built region topology, added additional attributes, and renamed the dataset to county24k. In 2007, the California Mapping Coordinating Committee (CMCC) requested that the California Department of Forestry and Fire Protection (CAL FIRE) resume stewardship of the statewide county boundaries data. CAL FIRE adopted the changes made by DFG and collected additional suggestions for the county data from DFG, DOC, and local government agencies. CAL FIRE incorporated these suggestions into the latest revision, which has been renamed cnty24k09_1. Detailed documentation of changes is included in the Process Step section of the metadata.
cnty24k09_1_poly metadata Credits:
U.S. Bureau of Reclamation, California Department of Conservation, California Department of Fish and Game, California Department of Forestry and Fire protection
cnty24k09_1_poly metadata Use Limitations:
See Citation section for FRAP disclaimer