"Contains a mosaic image of San Diego County, Calif. color orthoimages in ECW compressed image format. The original color infrared (CIR) imagery was processed to create a synthetic "natural color" version of the imagery ... The ECW image can be viewed in any application that supports the ECW format. This DVD contains plug-ins for several common applications that do not provide native ECW support ... The ER Viewer software application is also provided"--Readme file. Title from Readme file. Uncompressed file size: 116.37 GB (ECW compressed file size: 3.87 GB). "Date created: October, 2002"--Readme file (source data is from 2001). "Datum: NAD83"--Header file. System requirements: PC; software that supports the ECW compressed image format (plugins and standalone software included). Digital delivery of this content coming soon.