Log In

Normalized Difference Vegetation Index (NDVI) – 2006

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


GIS Data Disclaimer

Data Field Descriptions

This raster is a float, containing values between -1.000 and +1.000

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.


GIS Source Information
Database Name: AERIAL
Feature Class Name: LARIAC_NDVI_2006
Feature Dataset Name (if applicable):
Reference Date: 2006
Accuracy: Parcel
Update Frequency: Unknown
Access Constraints:Government

Contact Information
Mark Greninger
Geographic Information Officer
County of Los Angeles
Chief Information Office
350 S Figueroa Street
Suite 188
Los Angeles, CA 90071
mgreninger@cio.lacounty.gov
(213) 253-5624
Add Comment Register



Leave a Reply