2003 Aerial Imagery
Full Documentation
To learn the details of these images, including which images cover which areas, please refer to the Report of Collected Aerial Imagery.
Quick start
The names of the photo files listed below use the following convention:
Consider the example: SL_Ortho-Mosaic_1067_102403_1200-10x.sid (MrSID format photo file)- SL—Site name (see abbreviation key below)
- Ortho—Rectification method (Ortho:photo was ortho-rectified; Geo-rct:photo was geo-rectified; AP:Air photo)
- Mosaic—Consists of two or more individual photos, mosaiced together
- 1067—WWR project number
- 102403—Date photo was taken (October 24, 2003)
- 1200—Pixel resolution of photo image file
- 10x—Compression factor using MrSID software (compressed by a factor of 10)
The site name abbreviations are as follows:
- Sites in Project
- BrI - Brown's Island
- BuI - Bull Island
- CI - Coon Island
- P2A - Pond 2A
- CM - Carl's Marsh (Petaluma River Marsh)
- SL - Sherman Lake
- Sites not in Project
- BB - Big Break
- P3 - Pond 3
- SS - San Souci
Complete metadata is stored in each file's namesake HTML and XML files, but here are the basics:
- All of the selected site mosaics are in MrSID format (compressed from TIFF). MrSID files can be read in most GIS software, though an extension (included in all ESRI GIS products) may be required to view the photos.
- Clipped photos have been included to exclude non-data fiducial/flight information. Clipping occurred subsequent to ortho-rectification and prior to mosaicing.
- All aerial photos were taken between August and October, 2003.
- 1:9,600 is the (geographic/fractional) scale for individual photos (and mosaics) for all sites except for Carl's Marsh, which is 1:7,200. Pixel size for all ortho-rectified images is 0.2 meters (0.67ft).
- All image files conform to the following projection parameters:
-
- Projection: UTM
- Zone: 10N
- Datum: NAD83
- Units: Meters
Additional information regarding a photo's horizontal accuracy (rectification RMS) can be found in the table titled "Rectification Parameters". For additional information, contact Wetlands and Water Resources (WWR): (415) 457-0250 | www.swampthing.org
All photo images are public domain. Citation and credit information follows: All photos were produced by Hammon, Jensen & Wallen, Oakland, CA. All photo processing and documentation was carried out by Jake Schweitzer, WWR, November 2003.
Image files for download
Note: These files range in size up to 100 MB. If you have trouble downloading a file, try a right-click or click-&-hold on the file to reveal your browser‘s popup menu to “Save as...” or “Download...” the file.
