Log In

2011 4-inch and 1 foot Orthophoto Imagery Date Flown – LARIAC 3

This dataset contains the dates of the imagery compiled into the 2011 Los Angeles Regional Imagery Acquisition Consortium 4-inch and 1-foot color orthophotography.  We are currently waiting for one final block to be added to this dataset (the National Forest north of Santa Clarita).

Each polygon contains a 8 digit number that corresponds to the date the image was acquired.  Over 350,000 individual image chips were merged to create a seamless orthophoto across the County of Los Angeles.  This dataset will enable participants and other entities to know  the date the image was acquired.

Processing History

This dataset was extracted from a larger polygon file (with 105,000 polygons) which contained the boundaries of the individual image chips that were merged into the final LARIAC product.  In order to reduce the size of the file, the boundaries were smoothed using the ArcMap generalize command to reduce the number of vertices, which reduces the file size while not dramatically impacting accuracy.



Download the data

Using GIS Data on this site

GIS Data downloaded from this site generally requires GIS software to view. Click here for a list of GIS Data Viewers

GIS data available on this website is provided AS IS - please read the GIS Data Portal Terms of Use

Data Field Descriptions

This dataset has a single field:

  • Dateflown: an 8-digit number (YYYYMMDD) that shows the date flown (e.g. 20110525 is May 25, 2011)

GIS Source Information
Database Name:
Feature Class Name:
Feature Dataset Name (if applicable):
Reference Date: 2011
Accuracy: Other
Update Frequency: Other
Access Constraints:None

Contact Information
Steve Steinberg
Geographic Information Officer
County of Los Angeles
Internal Services Department
9150 E. Imperial Hwy, MS#3
33.916650, -118.132255
Downey, CA 90242
(562) 392-7126

Leave a Reply