The entire LiDAR dataset is [...]]]> 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 now available for download via an ftp/http directory from the NOAA Coastal Service Center’s Digital Coast Data Registry. The data are packaged as .laz files. Please read the 0README file in the directory for instructions on how to download. For technical questions, please contact NOAA CSC staff, Keil Schmid at keil.schmid@noaa.gov.

The Ocean Protection Council is looking for illustrated examples of how the LiDAR data are being used. This can be an image, map, figure, etc you developed based on the LiDAR or DEMs.  We would like to use these illustrated examples in future presentations about how the LiDAR and derived products are applied. If you are able, please email me a screen capture or small jpeg for use in presentations, with your permission.

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 makes it extremely accurate.  This source [...]]]> 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 makes it  extremely accurate.  This source was used for urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles, while for the National Forest contours were created using stereo compilation.

This dataset meets or exceeds ASPRS (American Society for Photogrammetry and Remote Sensing) 1:100 scale mapping.  Accuracy is within +/- 2 feet of true location with 95% confidence.

Detailed product information is contained in the LAR-IAC Product Guide.

We highly recommend that you visit the LAR-IAC Project Website to find a rich source of information about the data and the LAR-IAC program.  The site includes project documents, full FGDC compliant metadata, data downloads of related GIS used to complete the project, sub-licensing information, sample imagery and data, and information about the 2006 acquisition.

GIS Data showing flight-date information is available from the LAR-IAC Project website site, and elsewhere in the LA County GIS Data Portal.

The imagery is held under license from InfoTech International, and cannot be publicly released.  Government entities are eligible to join the LAR-IAC program to access the data.  Private entities may contact InfoTech directly to purchase selected parts of the data.

Data Access

Please note that this data is not available to the public.  The USGS has a public, 10 foot  foot version of the Digital Elevation Model

For County staff only, use the layer file below, which has symbology and data access:

• LAR-IAC Contours (2006) – ArcGIS 10.1 layer file

Samples

About LAR-IAC

The Los Angeles Region Imagery Acquisition Consortium (LAR-IAC) Program is a collaborative acquisition program for digital aerial imagery data which has included the participation of 10 County departments, 30 municipalities, and four other public agencies.

The consortium is a model for regional cooperation that improves the quality, access, and cost-effectiveness of high resolution digital aerial imagery. Knowledge transfer is increased through consortium program meetings, user groups, and various workshops that have been established in conjunction with the project. The imagery acquired will enable all participating jurisdictions to leverage this key geographic information asset for numerous decision support and business applications, thereby facilitating the effective and efficient delivery of services.

Purchasing LAR-IAC data

Government agencies acquire LAR-IAC elevation data only through the County consortium.  Private companies can acquire LAR-IAC data as part of a project they are working on with a LAR-IAC consortium member, or by contacting the original data vendor, Infotech. Contact information is here:

Srinu Ratnala
Project Manager – N & CE
Infotech Enterprises America, Inc
100 Carpenter Drive, STE 200,
Sterling, VA – 20164
Tel  : + 1 (571) 313-1065 Ext: 129
Cell : + 1 (703) 401-6586
E-mail : Srinu.Ratnala@infotech-enterprises.com
www.infotech-enterprises.com

USGS CLICK site

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 USGS Center for LIDAR Information Coordination and Knowledge (CLICK).

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

This hillshade was computed from the 2006 Digital Elevation Model (DEM) [...]]]> 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) acquired by the Los Angeles Regional Imagery Acquisition Consortium (LAR-IAC), and is a 5 foot by 5 foot raster grid.  This hillshade has been improved by Hwa Saup Lee of the County’s Internal Services Department to smooth the differences between the two LAR-IAC collection areas (high resolution 5 foot and low resolution 10 foot) and create a single seamless hillshade.

Samples

Countywide

Detailed View

Layer File

Hillshade (2006) – Corrected (Layer File)

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 elevation related [...]]]>

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 elevation related datasets acquired by LAR-IAC in 2006.  These datasets included:

1. Digital Elevation Model gridded
2. Digital Elevation Model point
3. Digital Surface Model gridded
4. Digital Surface Model point
5. 2-foot contours

The DSM is a critical component for a large variety of applications, most which require specialized training, software, and skills, but are critical for organizations:

• Relief Mapping
• Flood Modeling
• Solar Mapping
• Terrain Modeling
• and many others.

DSM Detail

The Digital Surface Model was acquired using LIDAR (Light Detection And Ranging), which used a laser mounted in the planes that were acquiring the 4-inch orthophotography data.  Hundreds of millions of ground measurements were made using this system, which is extremeley accurate.  This source was used for urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles.

This dataset meets or exceeds ASPRS (American Society for Photogrammetry and Remote Sensing) 1:100 scale mapping.  Accuracy is within +/- 2 feet of true location with 95% confidence.

Detailed product information is contained in the LAR-IAC Product Guide.

We highly recommend that you visit the LAR-IAC Project Website to find a rich source of information about the data and the LAR-IAC program.  The site includes project documents, full FGDC compliant metadata, data downloads of related GIS used to complete the project, sub-licensing information, sample imagery and data, and information about the 2006 acquisition.

GIS Data showing flight-date information is available from the site, and elsewhere in the LA County GIS Data Portal.

The imagery is held under license from InfoTech International, and cannot be publicly released.  Government entities are eligible to join the LAR-IAC program to access the data.  Private entities may contact InfoTech directly to purchase selected parts of the data.

About LAR-IAC

The Los Angeles Region Imagery Acquisition Consortium (LAR-IAC) Program is a collaborative acquisition program for digital aerial imagery data which has included the participation of 10 County departments, 30 municipalities, and four other public agencies.

The consortium is a model for regional cooperation that improves the quality, access, and cost-effectiveness of high resolution digital aerial imagery. Knowledge transfer is increased through consortium program meetings, user groups, and various workshops that have been established in conjunction with the project. The imagery acquired will enable all participating jurisdictions to leverage this key geographic information asset for numerous decision support and business applications, thereby facilitating the effective and efficient delivery of services.

Purchasing LAR-IAC data

Government agencies acquire LAR-IAC elevation data only through the County consortium.  Private companies can acquire LAR-IAC data as part of a project they are working on with a LAR-IAC consortium member, or by contacting the original data vendor, Infotech. Contact information is here:

Srinu Ratnala
Project Manager – N & CE
Infotech Enterprises America, Inc
100 Carpenter Drive, STE 200,
Sterling, VA – 20164
Tel  : + 1 (571) 313-1065 Ext: 129
Cell : + 1 (703) 401-6586
E-mail : Srinu.Ratnala@infotech-enterprises.com
www.infotech-enterprises.com

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 .

This dataset is one of a group of [...]]]>  

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 .

This dataset is one of a group of elevation related datasets acquired by LAR-IAC in 2006.  These datasets included:

1. Digital Elevation Model gridded
2. Digital Elevation Model point
3. Digital Surface Model gridded
4. Digital Surface Model point
5. 2-foot contours

The DEM is a critical component for a large variety of applications, most which require specialized training, software, and skills, but are critical for organizations:

• Relief Mapping
• Contour development
• Hillshades
• Watershed Modeling
• Flood Modeling
• Solar Mapping
• Terrain Modeling
• and many others.

The elevation data acquired by the County has two sources of information:

1. LIDAR (Light Detection And Ranging), which used a laser mounted in the planes that were acquiring the 4-inch orthophotography data.  Hundreds of millions of ground measurements were made using this system, which is extremeley accurate.  This source was used for the majority of urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles.
2. Stereo Compilation – Overlapping pictures were analyzed to extract the elevation data.  This is a more historical technique that produced a less accurate, but still valuable product.  This data covers the Angeles National Forest, approximately 1,056 square miles, and is a separate dataset.

DEM Detail

This dataset meets or exceeds ASPRS (American Society for Photogrammetry and Remote Sensing) 1:100 scale mapping.  Accuracy is within +/- 2 feet of true location with 95% confidence.

Detailed product information is contained in the LAR-IAC Product Guide.

We highly recommend that you visit the LAR-IAC Project Website to find a rich source of information about the data and the LAR-IAC program.  The site includes project documents, full FGDC compliant metadata, data downloads of related GIS used to complete the project, sub-licensing information, sample imagery and data, and information about the 2006 acquisition.

GIS Data showing flight-date information is available from the site, and elsewhere in the LA County GIS Data Portal.

The imagery is held under license from InfoTech International, and cannot be publicly released.  Government entities are eligible to join the LAR-IAC program to access the data.  Private entities may contact InfoTech directly to purchase selected parts of the data.

About LAR-IAC

The Los Angeles Region Imagery Acquisition Consortium (LAR-IAC) Program is a collaborative acquisition program for digital aerial imagery data which has included the participation of 10 County departments, 30 municipalities, and four other public agencies.

The consortium is a model for regional cooperation that improves the quality, access, and cost-effectiveness of high resolution digital aerial imagery. Knowledge transfer is increased through consortium program meetings, user groups, and various workshops that have been established in conjunction with the project. The imagery acquired will enable all participating jurisdictions to leverage this key geographic information asset for numerous decision support and business applications, thereby facilitating the effective and efficient delivery of services.

Purchasing LAR-IAC data

Government agencies acquire LAR-IAC elevation data only through the County consortium.  Private companies can acquire LAR-IAC data as part of a project they are working on with a LAR-IAC consortium member, or by contacting the original data vendor, Infotech. Contact information is here:

Srinu Ratnala
Project Manager – N & CE
Infotech Enterprises America, Inc
100 Carpenter Drive, STE 200,
Sterling, VA – 20164
Tel  : + 1 (571) 313-1065 Ext: 129
Cell : + 1 (703) 401-6586
E-mail : Srinu.Ratnala@infotech-enterprises.com
www.infotech-enterprises.com