The Cal-Atlas site facilitates the coordinated and sustainable development, maintenance, licensing and sharing of geospatial data and web map services by California government agencies, partners and stakeholders. California government agencies work with the California GIS Council, regional GIS collaboratives and the broader California GIS community to define the data architecture, systems, standards, agreements and processes [...]
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This dataset contains watershed boundaries for watersheds covering Los Angeles County. This dataset was downloaded, extracted and prepared from the National Hydrography Dataset. The NHD is a comprehensive effort by the US Geological Survey to manage and maintain a comprehensive, high quality, nationwide dataset for GIS mapping and analysis of water features [...] This dataset contains hydologic points (gaging stations, gates, rock features, springs, water intakes, wells, waterfalls, reservoir points) in LA County. This dataset was downloaded, extracted and prepared from the National Hydrography Dataset. The NHD is a comprehensive effort by the US Geological Survey to manage and maintain a comprehensive, high quality, nationwide [...] This dataset contains lakes & reservoirs in LA County. This dataset was downloaded, extracted and prepared from the National Hydrography Dataset. The NHD is a comprehensive effort by the US Geological Survey to manage and maintain a comprehensive, high quality, nationwide dataset for GIS mapping and analysis of water features and conveyance. [...] This dataset contains rivers, streams, and water conveyance mechanisms (pipelines, aqueducts). This dataset was downloaded, extracted and prepared from the National Hydrography Dataset. The NHD is a comprehensive effort by the US Geological Survey to manage and maintain a comprehensive, high quality, nationwide dataset for GIS mapping and analysis of water features [...] Abstract: Los Angeles Basin, Santa Clara River Basin, and Antelope Valley are divided into zones that yield similar volumes of sediment under similar conditions. These are called Debris Potential Area (DPA) zones. Sediment production from a watershed is a rate at which sediment passes a particular point, usually expressed as cubic yards per square [...] Abstract: This represents the groundwater basins and sub-basins as defined by the California Department of Water Resources. Groundwater basins are designated on the basis of geological and hydrological conditions, these usually being the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. [...] Abstract: Direction of water flow between sub watersheds (or watershed sub basins). Data can be downloaded here Abstract: City Sanitary and Private Sewers not Maintained by LA County. Purpose: To identify nearby private and city sanitary sewers that county sewer crews do not maintain Data can be downloaded here [...] Abstract: Sanitary Sewers Maintained by the Los Angeles County Sewer Maintenance Districts (SMD). Purpose: Identifies sanitary sewers (gravity sewers, siphons and force mains) maintained by the Department of Public Works. Supplemental Information: The Los Angeles County Department of Public Works operates two special districts for the purpose of maintaining sanitary sewers: The Marina del [...] Abstract: Annotation for the Storm Drains. Purpose: To be used with the storm drains line work. Data can be downloaded here |
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