Significant Ecological Areas (SEA)
Significant Ecological Areas (SEA) Significant Ecological Area (SEA) means an area that is determined to possess an example of biotic resources that cumulatively represent biological diversity for the purposes of protecting biotic diversity, as part of the Los Angeles County general plan or the city’s general plan. Additional [...]
This layer delineates ridgelines within selected CSDs whereupon restrictions are established for grading and ridgeline development. For more information on specific CSDs where these ridgelines reside, click here.
Data can be downloaded here:
DRP_RIDGELINES (zipped shapefile)
Depicts lands owned or managed by the U.S. Forest Service and designated by U.S. Government as a National Forest. The Los Padres and Angeles National Forests lie within the boundaries of Los Angeles County.
Data can be downloaded here:
Download Shapefile / .zip
Significant Environmental Resource Areas
Sensitive Environmental Resources (SERA) – Coast Zone Only
These are in the Coastal Zone area only, and they afford the highest protection from future land development due to their environmental signifigance and sensitivity. ESHA’s [...]
Fire Perimeters for Los Angeles County from 1965 to 2011. No attribute data for the years 1965-1968.fires1965-2011
Proposed Significant Ecological Areas
Proposed updates to the Significant Ecological Areas are based on aerial imagery and parcels. Please note that proposed SEAs have not been officially adopted as part of the L.A. County General Plan. For the Existing/Adopted SEAs click here.
From the Los Angeles County Draft General Plan [...]
NOAA provides a wealth of GIS data, including updates of its weather predictions.
Here are some useful links:
The NWS GIS Data Portal, where you can download kml and shapefiles. From there, you can go to: The NWS Web Services Page, where you can get the connection information for live [...]
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 [...]
The coastal zone, which was specifically mapped by the Legislature, covers an area larger than the State of Rhode Island. On land the coastal zone varies in width from several hundred feet in highly urbanized areas up to five miles in certain rural areas, and offshore the coastal zone includes a three-mile-wide band of ocean.
WorldClim is a set of global climate layers (climate grids) with a spatial resolution of a square kilometer. They can be used for mapping and spatial modeling in a GIS or other computer programs. If you are not familiar with such programs, you can tryDIVA-GIS.
The database is documented [...]
Abstract: A polygon layer showing soil types in Los Angeles County. This layer shows the delineation and the county soil number (2-180). These soils have runoff coefficient curves associated with them found in the hydrology manual (http://ladpw.org/wrd/publication/) that allow an individual to determine how much runoff results from rainfall. This includes soils in the [...]
Solar Insolation (global radiation) for the County of Los Angeles developed from information captured in 2006 by the LAR-IAC program.
This data was created through the Area Solar Radiation function in ESRI’s ArcGIS Desktop. For more details about this function, view the ESRI help file. That function creates four output files:
Normalized Difference Vegetation Index (NDVI) for the urban/suburban areas of the County of Los Angeles developed from information captured in 2006 by the LAR-IAC program.
The Normalized Difference Vegetation Index (NDVI) is a simple numerical indicator that can be used to analyze remote sensing measurements, typically but not necessarily from a space platform, and [...]
Tree Canopy for the urban/suburban areas of the County of Los Angeles developed from information captured in 2006 by the LAR-IAC program. This dataset was updated in October 2011 – see below for details.
This dataset was developed by the County of Los Angeles Chief Information Office in support of the LA County Solar [...]