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

http://www.dot.ca.gov/hq/tsip/gis/datalibrary/gisdatalibrary.html

Thought I would share.

The Countywide building outline dataset contains building outlines (over 3,000,000) for all buildings in Los Angeles County, including building height, building area, and the parcel number (also known as building footprints).  This data was captured from stereo imagery as part of the LAR-IAC2 Project (2008 acquisition).

Credits County of Los Angeles Department of Regional Planning GIS Section.

Access and use limitations Every reasonable effort has been made to assure the accuracy of this data. DRP makes no warranty, representation, or guarantee as to the content, sequence, accuracy, timeliness, or completeness of any of the [...]]]> Description
Adopted Scenic Highways.

Credits
County of Los Angeles Department of Regional Planning GIS Section.

Access and use limitations
Every reasonable effort has been made to assure the accuracy of this data. DRP makes no warranty, representation, or guarantee as to the content, sequence, accuracy, timeliness, or completeness of any of the data provided herein. DRP explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. DRP shall assume no liability for any errors, omissions, or inaccuracies in the information provided regardless of how caused. All rights to this data are reserved.

Data can be downloaded here:

• Download shapefile

Eventually, the Countywide Address Management System (CAMS) project will use data conflated from other sources.  This also includes address points (not just the street network).  More information about CAMS can be found by clicking here or entering [...]]]> The County of Los Angeles currently uses a licensed street network from Thomas Brothers Map Company.

Eventually, the Countywide Address Management System (CAMS) project will use data conflated from other sources.  This also includes address points (not just the street network).  More information about CAMS can be found by clicking here or entering http://egis3.lacounty.gov/eGIS/?page_id=8 in your browser.

Data can be downloaded here:

Freeways

Statistical Areas 2000

The Statistical Areas dataset contains Statistical Areas from the LA County Department of Regional Planning (DRP). Statistical Areas are communities that can be grouped together to show areas of geographical connection in the county. To do this use the STAT_D field. Similar areas have the same first few [...]]]>

Statistical Areas 2000

The Statistical Areas dataset contains Statistical Areas from the LA County Department of Regional Planning (DRP). Statistical Areas are communities that can be grouped together to show areas of geographical connection in the county. To do this use the STAT_D field. Similar areas have the same first few digits. The more similar the number, the closer together the geographic areas are.

Data is designed to be accurate to the Thomas Brothers datasets for mapping purposes. It does not correspond to Census Bureau data. You must have a license for the Thomas Brothers data to use this dataset.  THIS DATASET IS BEING PHASED OUT; will be removed from portal very soon.

Data can be downloaded here:

• Download zipped shapefile

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)

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:

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 [...]]]>

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 assess whether the target being observed contains live green vegetation or not.

For more information on NDVI, read the wikipedia entry.

Samples

Countywide (click to enlarge)

Detailed View

This dataset was developed by the County of Los Angeles Chief Information Office in support of the LA County Solar Map Application (http://solarmap.lacounty.gov).  A solar model based upon the high-resolution digital aerial elevation data included the tops of trees, the ground, and other features that would skew any solar results.  For example – the top of a tree appeared to the solar model to be a prime candidate for solar photovoltaic installation due to the amount of sunlight it received, but this was obviously incorrect, and some way needed to be found to focus exclusively on building tops for the purpose of the site.

The trees were developed from the following  data sources:

1. 2006  Natural Color orthogonal imagery.  Click here for more information
2. 2006 Color Infrared (CIR) imagery at 4-inch resolution which contains the Red and Near Infrared (NIR) Bands.  Click here for more information

NDVI values range between -1 and 1.  Values > 0.1 are generally green vegetation, while values < 0.1 show things like buildings, streets, water and bare dirt.

Layer File (only works for County staff)

NDVI (2006) Layer File

This dataset was developed by the County of Los Angeles Chief Information Office in support of the LA County Solar [...]]]> 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 Map Application (http://solarmap.lacounty.gov).  A solar model based upon the high-resolution digital aerial elevation data included the tops of trees, the ground, and other features that would skew any solar results.  For example – the top of a tree appeared to the solar model to be a prime candidate for solar photovoltaic installation due to the amount of sunlight it received, but this was obviously incorrect, and some way needed to be found to focus exclusively on building tops for the purpose of the site.

Samples

Countywide

Detail View (click to enlarge)

Detail View with Imagery

The trees were developed from the following three data sources:

1. The Digital Elevation Model (DEM) which modeled the ground surface at 5-foot intervals.  Click here for more information
2. The Digital Surface Model (DSM) which modeled the surface at 5-foot intervals, which included all features like trees and buildings. Click here for more information
3. The Color Infrared (CIR) imagery at 4-inch resolution which contains the Red and Near Infrared (NIR) Bands.  Click here for more information

Processing steps:

1. A Surface Height Model was created by subtracting the DEM from the DSM: Click here for more information
2. A Normalized Difference Vegetation Index (NDVI) model was created.  Click here for more information.  NDVI values range between -1 and 1.  Values > 0.1 are generally green vegetation, while values < 0.1 show things like buildings, streets, water and bare dirt.
3. All areas where the surface height was greater than 8 feet, and the NDVI value was > 0.1 were extracted and assigned the value 1.  This is the trees layer.

Original

Updated

Important notes

This trees layer has been validated to provide a true representation of trees.  However, the data includes many small processing artifacts, and should not be used for authoritative measuring.

Layer Files

Tree Canopy (2006) – Updated (ArcGIS 10 Layer File) - This will work only for users connected to the LA County Network.

This data is part of the LAR-IAC (http://planning.lacounty.gov/lariac) datasets, and if you want use access this information you will need to participate in LAR-IAC.

Coverage Area (with Station Fire Perimeter)

On the morning of February 6th, 2010, the community of La Canada Flintridge saw a major debris flow on a number of streets [...]]]> This data is 6-inch color orthophotography flown the week of February 15th, 2010 to document the impact of debris flows February 6th, 2010.

Coverage Area (with Station Fire Perimeter)

On the morning of February 6th, 2010, the community of La Canada Flintridge saw a major debris flow on a number of streets on its northern edge.  This area had been on the southern edge of the Station fire in autumn 2009, and a heavy rainfall overnight caused a debris basin to overflow and neighboring houses to be impacted.

4-inch imagery (2008)

The County of Los Angeles through the Los Angeles Regional Aquisition Consortium (LAR-IAC), authorized the overflight of the southern boundary of the Station Fire in order to refresh existing imagery which would help the County and cities assess the impacts of the debris flow as well as analyze changes due to the station fire.

The capture was done by Aerial Express using a large-format camera and the County’s Elevation Model, which provides very good accuracy.  Note that the specifications were off the shelf, and some building lean and shifting may be apparent, as it does not meet the near-engineering grade accuracy of the LAR-IAC2 4-inch imagery captured in 2008.

6-inch imagery showing debris flow impact

Details

May 10, 2013 – added the 2D building outlines

Models of County owned buildings in three formats (shape, multipatch, and KML).  These buildings were created for the LA County Solar Map and were used for high resolution modeling of solar potential

Downtown Area

for each building.

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

Color Infrared, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in winter 2005/2006.

Infrared is an additional wavelength of information that can be captured by many aerial photography sensors in addition to the general Red/Green/Blue (RGB) channels typical to most imagery.  The [...]]]>  

Color Infrared, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in winter 2005/2006.

Infrared is an additional wavelength of information that can be captured by many aerial photography sensors in addition to the general Red/Green/Blue (RGB) channels typical to most imagery.  The Infrared band can be analyzed to easily separate vegetation from non-vegetated areas through image analysis, lending itself to find pervious vs. impervious surfaces, among other things.  The CIR from LAR-IAC has been used to extract the following information from the high-resolution imagery data:

• Buildings
• Trees
• NDVI (Normalized Difference Vegtation Index)

This imagery covers the majority of urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles.  The rest of the County, covering the National Forest, is covered by a one foot (1-foot) resolution digital orthoimagery, approximately 1,056 square miles, and is a separate dataset.  Information about that data is available in another part of the portal.

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.

Detail

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.

Coverage

Buildings 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 developed by the County of Los Angeles Chief Information Office in support of the LA County Solar Map Application (http://solarmap.lacounty.gov).  A solar model [...]]]>

Coverage

Buildings 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 developed by the County of Los Angeles Chief Information Office in support of the LA County Solar Map Application (http://solarmap.lacounty.gov).  A solar model based upon the high-resolution digital aerial elevation data included the tops of trees, the ground, and other features that would skew any solar results.  For example – the top of a tree appeared to the solar model to be a prime candidate for solar photovoltaic installation due to the amount of sunlight it received, but this was obviously incorrect, and some way needed to be found to focus exclusively on building tops for the purpose of the site.

The buildings were developed from the following three data sources:

1. The Digital Elevation Model (DEM) which modeled the ground surface at 5-foot intervals.  Click here for more information
2. The Digital Surface Model (DSM) which modeled the surface at 5-foot intervals, which included all features like trees and buildings. Click here for more information
3. The Color Infrared (CIR) imagery at 4-inch resolution which contains the Red and Near Infrared (NIR) Bands.  Click here for more information

Processing steps:

1. A Surface Height Model was created by subtracting the DEM from the DSM: Click here for more information
2. A Normalized Difference Vegetation Index (NDVI) model was created.  Click here for more information.  NDVI values range between -1 and 1.  Values > 0.1 are generally green vegetation, while values < 0.1 show things like buildings, streets, water and bare dirt.
3. All areas where the surface height was greater than 8 feet, and the NDVI value was < 0.1 were extracted and assigned the value 1.  This is the building layer.

Detailed Graphic view of processing steps (4.6 Mb .pdf file)

Important notes

This building layer has been validated to provide a true representation of buildings.  However, the data includes many small processing artifacts, and should not be used for authoritative measuring, roof areas, etc.

Detail

Detail with imagery

Countywide Coverage

Natural color, leaf-off, 1-foot high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC2) in early 2008.  This imagery covers  the National Forest areas of the County, approximately 1,056 square miles, and is a separate dataset.  The urban/suburban areas of the County in mainland (approximately 2,898 [...]]]>

Countywide Coverage

Natural color, leaf-off, 1-foot high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC2) in early 2008.  This imagery covers  the National Forest areas of the County, approximately 1,056 square miles, and is a separate dataset.  The urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Santa Catalina Island are covered by a 4-inch dataset.    Information about the 4-inch data is available in another part of the Data Portal.

This dataset meets or exceeds ASPRS (American Society for Photogrammetry and Remote Sensing) 1:200 scale mapping.  Accuracy is within +/- 2 feet of true location with 95% confidence.

Detailed product information is contained in the LAR-IAC2 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 Pictomtery International, and cannot be publicly released.  Government entities are eligible to join the LAR-IAC program to access the data.  Private entities may contact Pictometry 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.

Coverage

Natural color, leaf-off, 1-foot high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in early 2006.  This imagery covers  the National Forest areas of the County, approximately 1,056 square miles, and is a separate dataset.  The urban/suburban areas of the County in mainland (approximately 2,898 square [...]]]>

Coverage

Natural color, leaf-off, 1-foot high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in early 2006.  This imagery covers  the National Forest areas of the County, approximately 1,056 square miles, and is a separate dataset.  The urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Santa Catalina Island are covered by a 4-inch dataset.    Information about the 4-inch data is available in another part of the Data Portal.

This dataset meets or exceeds ASPRS (American Society for Photogrammetry and Remote Sensing) 1:200 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.

1-foot/4-inch comparison

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.

Detail

Natural color, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in early 2006.  This imagery covers the majority of urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Santa Catalina Island covering approximately 75 square miles.  The rest of [...]]]>

Detail

Natural color, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in early 2006.  This imagery covers the majority of urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Santa Catalina Island covering approximately 75 square miles.  The rest of the County, covering the National Forest, is covered by a one foot (1-foot) resolution digital orthoimagery, approximately 1,056 square miles, and is a separate dataset.  Information about that data is available in another part of the Data Portal.

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.

Detail

Natural color, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in winter 2007/2008.  This imagery covers the majority of urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles.  The rest of the [...]]]>

Detail

Natural color, leaf-off, 0.33-foot (4-inch) high-resolution, high-accuracy orthorectified aerial imagery, acquired by the Los Angeles Regional Imagery Consortium (LAR-IAC) in winter 2007/2008.  This imagery covers the majority of urban/suburban areas of the County in mainland (approximately 2,898 square miles) and Catalina Island covering approximately 75 square miles.  The rest of the County, covering the National Forest, is covered by a one foot (1-foot) resolution digital orthoimagery, approximately 1,056 square miles, and is a separate dataset.  Information about that data is available in another part of the portal..

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-IAC2 Product Guide.

We highly recommend that you visit the LAR-IAC Program 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 4-inch imagery is held under license from Pictometry International, and cannot be publicly released.  Government entities are eligible to join the LAR-IAC program to access the data.  Private entities may contact Pictometry directly to purchase selected parts of the data.  A one-foot, resampled version of this file is available from the US Geological Survey as a public domain product.

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.