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Service Description:

1942 aerials for the Santa Rosa Plain in central Sonoma County. These aerial photographs were collected by the Department of War and were used for planning troop deployment in case of a Japanese invasion of the West Coast. This set of photography is the earliest complete countywide set of air photos of Sonoma County. In an effort funded by the Ag + Open Space District, the Sonoma County Water Agency and others, hard copy air photos (9" x 9") were scanned and georeferenced by SFEI. Download the TIFF data for this resource here. Please cite this dataset using both of the citations below:

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-photomosaic-image-1942. 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
San Francisco Estuary Institute (SFEI). 2017. "Petaluma River Water Historical Aerial Photomosaic 1942". Accessed [date retrieved]. http://www.sfei.org/data/petaluma-river-watershed-historical-aerial-phot.... Photo prints from: US Department of Agriculture (USDA), Western Division Laboratory. 1942. [Aerial photos of Sonoma and Marin Counties]. Scale: 1:20,000. Agricultural Adjustment Administration (AAA). Courtesy of Earth Sciences & Map Library, UC Berkeley, and the National Archives and Records Administration (NARA).

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, SFEI recommends 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.

Related Content:

https://sonomaopenspace.egnyte.com/dl/cKYbFGU2qP - this will link you to a .img file of this content
https://sonomavegmap.org/1942 - story map that allows you to compare central Sonoma County in 1942 to central Sonoma County today

Map Name: Layers

Legend

All Layers and Tables

Layers:

1942_Central_Sonoma_County.img(0)

Tables:

Description:

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-photomosaic-image-1942. 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
San Francisco Estuary Institute (SFEI). 2017. "Petaluma River Water Historical Aerial Photomosaic 1942". Accessed [date retrieved]. http://www.sfei.org/data/petaluma-river-watershed-historical-aerial-phot.... Photo prints from: US Department of Agriculture (USDA), Western Division Laboratory. 1942. [Aerial photos of Sonoma and Marin Counties]. Scale: 1:20,000. Agricultural Adjustment Administration (AAA). Courtesy of Earth Sciences & Map Library, UC Berkeley, and the National Archives and Records Administration (NARA).

Related Content:

https://sonomaopenspace.egnyte.com/dl/cKYbFGU2qP - this will link you to a .img file of this content
https://sonomavegmap.org/1942 - story map that allows you to compare central Sonoma County in 1942 to central Sonoma County today

Copyright Text: San Francisco Estuary Institute (SFEI), Sonoma Ag + Open Space, Sonoma County Water Agency

Spatial Reference:
102100

Single Fused Map Cache: true

Capabilities: Map,TilesOnly

Tile Info:

Height: 256
Width: 256
DPI: 96
Levels of Detail: (# Levels: 20)

Level ID: 0 [Start Tile, End Tile]
Level ID: 1 [Start Tile, End Tile]
Level ID: 2 [Start Tile, End Tile]
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Level ID: 17 [Start Tile, End Tile]
Level ID: 18 [Start Tile, End Tile]
Level ID: 19 [Start Tile, End Tile]

Format: PNG
Compression Quality: 0
Origin:
Spatial Reference:
102100

Initial Extent:

Full Extent:

Min Scale: 5.91657527591555E8
Max Scale: 1128.497176

Min LOD: 0
Max LOD: 19

Units: esriMeters

Supported Image Format Types: PNG

Export Tiles Allowed: false
Max Export Tiles Count: 100000

Document Info:

Title: 1942 Aerials for Central Sonoma County (updated 1/2018)
Author: mtukman_osd
Comments:
Subject: 1942 black and white aerial photography, scanned and georeferenced from hard copy prints. Mosaic covers a swath of central Sonoma County between Dry Creek Valley and Petaluma.
Category:
Keywords: Historic Imagery, Sonoma County, Historical Ecology, Historic Photos, Historical Vegetation, Dry Creek Valley, Laguna de Santa Rosa, Petaluma