Author: 
San Francisco Estuary Institute

Orthorectified historical aerial photography for the lower Laguna de Santa Rosa watershed was developed as a historical reference tool. The historical aerial photography mosaic was used to develop a reconstruction of the historical landscape and prevailing conditions of lower Laguna de Santa Rosa watershed. This dataset was developed to provide information for watershed management, the restoration of habitats, flood protection, and local education and research. More information about the project is available at http://www.sfei.org/LagunadeSantaRosaHE . This data set andother information about the project is also available at http://sonomavegmap.org/

Creation Date: 
Friday, July 11, 2014
Last Updated: 
Friday, July 11, 2014
Type of Data: 
GIS imagery/raster
Programs and Focus Areas: 
Resilient Landscapes Program
Historical Ecology
Location Information
Project Location(s): 
Data Availability
Please Cite This Dataset as: 

San Francisco Estuary Institute (SFEI). 2014. "Laguna de Santa Rosa Historical Aerial Photomosaic 1942". Accessed [date retrieved]. http://www.sfei.org/data/laguna-de-santa-rosa-historical-aerial-photomos.... Photo prints from: US Department of Agriculture (USDA), Western Division Laboratory. 1942. [Aerial photos of Sonoma County]. Scale: 1:20,000. Agricultural Adjustment Administration (AAA). Courtesy of Earth Sciences & Map Library, UC Berkeley, and Draftech Blueprinting, Inc,

Terms of Use: 

Given the challenges of historical data, accuracy varies in different parts of the image, and in some places horizontal displacement may be as high as 50 meters.  For this reason, we recommend that the imagery be used at a coarse scale.  Caution should be used when comparing this imagery to more spatially accurate contemporay sources.

Data may be subject to change without prior notification. If this data is modified, changes should be documented in a metadata record that should accompany all redistributed data. If data is transmitted or provided in any form to another user, the data must be accompanied by a copy of this disclaimer and all documentation provided with the original data set, including the full metadata record. SFEI-ASC requests that the use of these data in any map, publication, or report should cite this study or the direct data source(s) used and give proper attribution and credit to the originators of the data.

Data URL: 
Downloadable orthophotomosaic (IMG format, 422 MB)
Sonoma County Vegetation Mapping & Lidar Program (Data viewer includes slider over modern photo)
Contact: 
eigis@sfei.org