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 LAR-IAC 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.
Samples
Download the data
- lariac3_dateflown.zip (22 Mb zipped shapefile that includes a layer file to help with symbology)
- LARIAC 3 Date Flown (2011).lyr (For County staff only – layer file that connects directly to the Enterprise GIS repository to show the data)