Description: The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" “Standard” (http://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level) for the entire United States. Some areas may also include additional subdivisions representing the 14- and 16-digit hydrologic unit (HU). At a minimum, the HUs are delineated at 1:24,000-scale in the conterminous United States, 1:25,000-scale in Hawaii, Pacific basin and the Caribbean, and 1:63,360-scale in Alaska, meeting the National Map Accuracy Standards (NMAS). Higher resolution boundaries are being developed where partners and data exist and will be incorporated back into the WBD. WBD data are delivered as a dataset of polygons and corresponding lines that define the boundary of the polygon. WBD polygon attributes include hydrologic unit codes (HUC), size (in the form of acres and square kilometers), name, downstream hydrologic unit code, type of watershed, non-contributing areas, and flow modifications. The HUC describes where the unit is in the country and the level of the unit. WBD line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications.
Copyright Text: Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agenciesies. Representatives from many agencies contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the WBD Standards. Acknowledgment of the originating agencies would be appreciated in products derived from these data. See dataset specific metadata for further information
RIVER_BASIN
(
type: esriFieldTypeString, alias: River Basin, length: 100
)
DATA_SOURCE
(
type: esriFieldTypeString, alias: Data Source, length: 255
)
COORDINATE_METHOD_D
(
type: esriFieldTypeString, alias: Coordinate Capture Method, length: 50
, Coded Values:
[Digitized off of quad sheets: Digitized off of quad sheets]
, [Using photogrammetric techniques: Using photogrammetric techniques]
, [Surveyed using RTK GPS: Centimeter Level, used a minimum of 2 GPS recievers for Real Time Kinematic GPS positioning, may have been post processed.]
, ...9 more...
)
Description: The dataset is a feature class showing the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resources as last modified by the Basin Boundary Emergency Regulation adopted on October 21, 2015 and subsequent modifications requested through the Basin Boundary Modification Request Process. The file is in ESRI geodatabase format and is intended for use with compatible GIS software. Groundwater basins are represented as polygon features and designated on the basis of geological and hydrological conditions - usually the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. Basins are named and numbered per the convention of the Department of Water Resources. The associated data are considered DWR enterprise GIS data, which meet all appropriate requirements of the DWR GIS Spatial Data Standards. DWR makes no warranties or guarantees, either expressed or implied, as to the completeness, accuracy or correctness of the data, nor accepts or assumes any liability arising from or for any incorrect, incomplete or misleading subject data. The official DWR GIS Data Steward for this dataset is Brett Wyckoff, who may be contacted at 916-651-9283, or at brett.wyckoff@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the official GIS Data Steward as available and appropriate.
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Description: This dataset is one of several available datasets related to California counties that were created as a group designed to work in topological sync with each other. Further details about these paired datasets can be found in their respective metadata. Further details about the full process and update notes can be found in the GDB container metadata.This specific dataset represents the basic (ie simplified) county dataset without the extra coding that can be found in the "full" dataset. In this dataset, all bays (plus bay islands and constructed features) are merged into the mainland, and coastal features (such as islands and constructed features) are not included, with the exception of the Channel Islands which ARE included. This dataset is the same as the cnty_basic, except for the addition of the Channel Islands.
Copyright Text: U.S. Bureau of Reclamation, California Department of Conservation, California Department of Fish and Game, California Department of Forestry and Fire Protection, National Oceanic and Atmospheric Administration
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Description: This dataset is one of several available datasets related to California counties that were created as a group designed to work in topological sync with each other. Further details about these paired datasets can be found in their respective metadata. Further details about the full process and update notes can be found in the GDB container metadata.This specific dataset represents the basic (ie simplified) county dataset without the extra coding that can be found in the "full" dataset. In this dataset, all bays (plus bay islands and constructed features) are merged into the mainland, and coastal features (such as islands and constructed features) are not included, with the exception of the Channel Islands which ARE included. This dataset is the same as the cnty_basic, except for the addition of the Channel Islands.
Copyright Text: U.S. Bureau of Reclamation, California Department of Conservation, California Department of Fish and Game, California Department of Forestry and Fire Protection, National Oceanic and Atmospheric Administration
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Description: This is a copy of the statewide Census Place GIS Tiger file. It is used to determine if a place is DAC or not by adding ACS (American Community Survey) Median Household Income (MHI) data at the place level. The IRWM web based DAC mapping tool uses this GIS layer. Every year this table gets updated after ACS publishes their updated MHI estimates. Created by joining 2018 DAC table to 2016 Census Place feature class. The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The TIGER/Line shapefiles include both incorporated places (legal entities) and census designated places or CDPs (statistical entities). An incorporated place is established to provide governmental functions for a concentration of people as opposed to a minor civil division (MCD), which generally is created to provide services or administer an area without regard, necessarily, to population. Places always nest within a state, but may extend across county and county subdivision boundaries. An incorporated place usually is a city, town, village, or borough, but can have other legal descriptions. CDPs are delineated for the decennial census as the statistical counterparts of incorporated places. CDPs are delineated to provide data for settled concentrations of population that are identifiable by name, but are not legally incorporated under the laws of the state in which they are located. The boundaries for CDPs often are defined in partnership with state, local, and/or tribal officials and usually coincide with visible features or the boundary of an adjacent incorporated place or another legal entity. CDP boundaries often change from one decennial census to the next with changes in the settlement pattern and development; a CDP with the same name as in an earlier census does not necessarily have the same boundary. The only population/housing size requirement for CDPs is that they must contain some housing and population. The boundaries of all incorporated places are as of January 1, 2013 as reported through the Census Bureau's Boundary and Annexation Survey (BAS). The boundaries of all CDPs were delineated as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2010 Census.
Description: FEMA declared disaster tables for counties was modified to create a geospatial data layer attributing disaster numbers, types and years to each county in the state of California. The data table is available through the FEMA website: https://www.fema.gov/data-visualization/disaster-declarations-states-and-countiesDisaster types were grouped under 5 categories:1. Flood (includes dam/levee break, tsunami)2. Fire3. Earthquake (although it’s not a lot, these first three are also consistent with the State Hazard Mitigation Plan’s 3 main statewide hazards). 4. Severe Weather (includes freezing, drought, coastal storm, hurricane, severe storm)5. Other (includes other, fishing losses, biological) Declaration number acronyms stand for:DR – Major Disaster DeclarationEM – Emergency DeclarationFM – Fire Management Assistance DeclarationFS – Fire Suppression Assistance
Copyright Text: FEMA Disaster Declarations for States and Counties: https://www.fema.gov/data-visualization/disaster-declarations-states-and-counties
Modified and converted to geospatial layer: California, Department of Water Resources, Office of Floodplain Management
Description: FEMA declared disaster tables for statewide disasters was modified to create a geospatial data layer attributing disaster numbers, types and years to the state of California boundary. The data table is available through the FEMA website: https://www.fema.gov/data-visualization/disaster-declarations-states-and-countiesDeclaration number acronyms stand for:DR – Major Disaster DeclarationEM – Emergency DeclarationFM – Fire Management Assistance DeclarationFS – Fire Suppression Assistance
Copyright Text: FEMA Disaster Declarations for States and Counties: https://www.fema.gov/datavisualization/
disaster-declarations-states-and-counties
Modified and converted to geospatial layer: California, Department of Water Resources, Office
of Floodplain Management.