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Public GIS Mapping Services

We are making a number of our GIS data layers available as public mapping services based upon ESRI’s ArcGIS Server technologies at this URL (http://public.gis.lacounty.gov/public/rest/services). More details on each service will follow as we have the time to describe them, but generally they include GIS data that can be downloaded from […]

LA County Bathymetry Data

The USGS developed a number of valuable bathymetric datasets off the coast of Los Angeles County in 1996 that we have loaded into our repository, and are made available here. The datasets include:

Source backscatter data 50 foot contours Bathymetry data in DEM format Hillshade Bathymetric Relief

For more details please visit: https://walrus.wr.usgs.gov/pacmaps/la-index.html

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NOAA merged Bathymetry & Topography DEM

NOAA’s Bathymetry website (http://ngdc.noaa.gov/mgg/bathymetry/relief.html) has an integrated DEM and Topgraphy dataset at 10 meter resolution for download.

The Santa Monica quad (found via the NGDC bathymetry website) covers all the waters of LA County and is available in two different vertical datums:

http://www.ngdc.noaa.gov/dem/squareCellGrid/download/663 http://www.ngdc.noaa.gov/dem/squareCellGrid/download/726 […]

LARIAC4 approved by the Board of Supervisors

Hello,

This Tuesday, December 3rd, the LA County Board of Supervisors approved the contract with Pictometry International Corp to acquire digital aerial imagery and QAQC services – collectively known as LARIAC4.

Link to the Board Agenda (LARIAC4 is item 15) Link to the Approved contract

As the project director, I am excited […]

Coastal LIDAR data from NOAA

The California Ocean Protection Council, in partnership with USGS and NOAA Coastal Services Center, funded a LiDAR data collection effort along the California coast and San Francisco Bay, between 2009-2011. The data were made available last year through the NOAA Coastal Service Center’s Digital Coast Data Access Viewer.

The entire LiDAR dataset is […]

2006 2-foot contours – LAR-IAC

2 foot contours acquired as part of the Los Angeles Regional Imagery Acquisition Consortium in 2006.

The Digital Surface Model was acquired using LIDAR (Light Detection And Ranging), which used a laser mounted in planes that were acquiring 4-inch orthophotography data. Hundreds of millions of ground measurements were made using this system, which […]

USGS site for LIDAR and Elevation Data

This site is a valuable resource for downloading LIDAR and Elevation data, including recent hi-resolution LIDAR along the coastlines of the United States.

Click to go to the National Map Viewer and Download location

California Spatial Information Library (CaSIL)

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 […]

2006 10-foot Digital Elevation Model (DEM) – LAR-IAC – Public Domain

Digital Elevation Model (DEM) acquired as part of the Los Angeles Regional Imagery Acquisition Consortium in 2006, and made public with the partnership of the US Geological Survey (USGS). The DEM represents bare earth, whereas a related product (DSM) contains elevations and includes buildings, vegetation, and roads, as well as natural terrain features, […]

Dams and Debris Basins – Point Locations

Abstract:

Debris Basins are key components of the Los Angeles County Flood Control District’s (LACFCD) flood control system. Typically located at the mouths of canyons, debris basins capture sediment, gravel, boulders, and vegetative debris that are washed out of the canyons during storms, protecting lower lying communities from possible flooding and property damage. Due […]

Height raster dataset (2006)

Height data for the urban/suburban areas of the County of Los Angeles developed from information captured in 2006 by the LAR-IAC program.

This height data was developed from the following two data sources:

The Digital Elevation Model (DEM) which modeled the ground surface at 5-foot intervals. Click here for more […]

Hillshade (2006)

A Hillshade is a shaded relief raster from a raster. Simply, when used with maps, it provides a three-dimensional aspect to the map based upon the relief of the underlying area. A more detailed definition of a hillshade can be found here.

This hillshade was computed from the 2006 Digital Elevation Model (DEM) […]

2006 5-foot (1.7 M) Digital Surface Model (DSM) – LAR-IAC

Digital Surface Model (DSM) acquired as part of the Los Angeles Regional Imagery Acquisition Consortium in 2006. The DSM contains elevations and includes buildings, vegetation, and roads, as well as natural terrain features, whereas the DEM (Digital Elevation Model) represents bare earth.

This dataset is one of a group of […]

2006 5-foot (1.7M) Digital Elevation Model (DEM) – LAR-IAC

 

Digital Elevation Model (DEM) acquired as part of the Los Angeles Regional Imagery Acquisition Consortium in 2006. The DEM represents bare earth, whereas a related product (DSM) contains elevations and includes buildings, vegetation, and roads, as well as natural terrain features, whereas .

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The 5 foot data cannot […]