COLLECTION NAME:
David Rumsey Historical Map Collection
mediaCollectionId
RUMSEY~8~1
David Rumsey Historical Map Collection
Collection
true
Author:
Ryker, Harrison
author
Ryker, Harrison
Author
false
Date:
1938
date
1938
Date
false
Short Title:
24. San Francisco Aerial Negative.
short_title
24. San Francisco Aerial Negative.
Short Title
false
Publisher:
Harrison Ryker
publisher
Harrison Ryker
Publisher
false
Publisher Location:
Oakland
publisher_location
Oakland
Publisher Location
false
Type:
Aerial Photograph
type
Aerial Photograph
Type
false
Obj Height cm:
23
obj_height_cm
23
Obj Height cm
false
Obj Width cm:
23
obj_width_cm
23
Obj Width cm
false
Scale 1:
6,000
scale_1
6,000
Scale 1
false
Note:
Set of 164 black and white negatives of the same Harrison Ryker Aerial 1938 Survey that we scanned for the San Francisco Library (our 5852.000). Negatives have been scanned to positive and the digital files provided by the Western Neighborhoods Project. The database, image processing, and large composite image by David Rumsey.
note
Set of 164 black and white negatives of the same Harrison Ryker Aerial 1938 Survey that we scanned for the San Francisco Library (our 5852.000). Negatives have been scanned to positive and the digital files provided by the <a href="http://outsidelands.org" target="_blank">Western Neighborhoods Project.</a> The database, image processing, and large composite image by David Rumsey.
Note
false
County:
San Francisco County (Calif.)
county
San Francisco County (Calif.)
County
false
City:
San Francisco (Calif.)
city
San Francisco (Calif.)
City
false
Full Title:
24. Aerial Negative. City and County of San Francisco. August 27, 1938. Scale: 1" = 500 Feet. (Aerial Photographs).
full_title
24. Aerial Negative. City and County of San Francisco. August 27, 1938. Scale: 1" = 500 Feet. (Aerial Photographs).
Full Title
false
List No:
10264.024
list_no
10264.024
List No
false
Series No:
25
series_no
25
Series No
false
Publication Author:
Ryker, Harrison
publication_author
Ryker, Harrison
Publication Author
false
Pub Date:
1938
pub_date
1938
Pub Date
false
Pub Title:
Aerial Negatives. City and County of San Francisco. August 27, 1938. Scale: 1" = 500 Feet.
pub_title
Aerial Negatives. City and County of San Francisco. August 27, 1938. Scale: 1" = 500 Feet.
Pub Title
false
Pub Note:
(Continued from Note field above). Shortly after 1938 Ryker established his company address as Harrison C. Ryker, Inc., at 1000 Ashby Avenue, Berkeley, California (relocating to east Oakland in the 1950s). He subsequently manufactured pocket and desktop stereoscopes and a vertical Sketchmaster, instruments that were extensively used by educational institutions and the military, especially during World War II. His experience in aerial photography led to further involvement in photo interpretation and cartography. An article in the journal The Timberman (1933) describes means of distinguishing individual species of forest trees on aerial photos; later applications were terrain analysis for petroleum geology and unmasking of ground camouflage during wartime. His largest product was the Wernstedt Mahan map plotter, patented in 1954, which was a standard cartographic device for its time. His instruments are in use today in libraries, air photo collections, and earth sciences departments throughout America; they are in the instrument collections of the Archives of the History of American Psychology, and the Institute of Geographical Exploration at Harvard University has the Ryker M-11 Reflecting Stereoscope. Among his patents were the (1) the adjustable pocket stereoscope filed with the United States Patent Office: Patented December 1940. Patent No. 2,225,602, and the (2) the stereoscope filed with the United States Patent Office: Filed September 1, 1937, Serial No. 161,973; Patented January 21, 1941, Patent No. 2,229,309. Harrison Ryker pioneered research in aerial photo interpretation. His work has been noted by A. Everett Wieslander, an early (1930s – 1950s) leader in the mapping of California vegetation and soils, in his Oral History produced by The Bancroft Library, and in a letter by Robert Colwell, Forestry Professor at the University of California, Berkeley.
pub_note
(Continued from Note field above). Shortly after 1938 Ryker established his company address as Harrison C. Ryker, Inc., at 1000 Ashby Avenue, Berkeley, California (relocating to east Oakland in the 1950s). He subsequently manufactured pocket and desktop stereoscopes and a vertical Sketchmaster, instruments that were extensively used by educational institutions and the military, especially during World War II. His experience in aerial photography led to further involvement in photo interpretation and cartography. An article in the journal The Timberman (1933) describes means of distinguishing individual species of forest trees on aerial photos; later applications were terrain analysis for petroleum geology and unmasking of ground camouflage during wartime. His largest product was the Wernstedt Mahan map plotter, patented in 1954, which was a standard cartographic device for its time. His instruments are in use today in libraries, air photo collections, and earth sciences departments throughout America; they are in the instrument collections of the Archives of the History of American Psychology, and the Institute of Geographical Exploration at Harvard University has the Ryker M-11 Reflecting Stereoscope. Among his patents were the (1) the adjustable pocket stereoscope filed with the United States Patent Office: Patented December 1940. Patent No. 2,225,602, and the (2) the stereoscope filed with the United States Patent Office: Filed September 1, 1937, Serial No. 161,973; Patented January 21, 1941, Patent No. 2,229,309. Harrison Ryker pioneered research in aerial photo interpretation. His work has been noted by A. Everett Wieslander, an early (1930s – 1950s) leader in the mapping of California vegetation and soils, in his Oral History produced by The Bancroft Library, and in a letter by Robert Colwell, Forestry Professor at the University of California, Berkeley.
Pub Note
false
Pub List No:
10264.000
pub_list_no
10264.000
Pub List No
false
Pub Type:
Aerial Photography
pub_type
Aerial Photography
Pub Type
false
Pub Maps:
166
pub_maps
166
Pub Maps
false
Pub Height cm:
23
pub_height_cm
23
Pub Height cm
false
Pub Width cm:
23
pub_width_cm
23
Pub Width cm
false
Image No:
10264024.jp2
image_no
10264024.jp2
Image No
false
Download 1:
fullsidurl
<a href=https://www.davidrumsey.com/rumsey/download.pl?image=/179/10264024.jp2 target=_blank>Full Image Download in JP2 Format</a>
Download 1
false
Download 2:
mrsidsoftwareurl
<a href=https://www.extensis.com/support/geoviewer-9 target=_blank >GeoViewer for JP2 and SID files</a>
Download 2
false
Authors:
Ryker, Harrison
author_thumbnail_label
Ryker, Harrison
Authors
false