About: Casa Grande Photogrammetric Test Range

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The Casa Grande Photogrammetric Test Range is a test range established in the mid-1960s to test the dynamic performance of aerial survey cameras. The range consisted of consist of 272 concrete calibration markers embedded into the Earth's surface in and around Casa Grande, Arizona, United States. The markers are commonly (and erroneously) believed to have been used to aid camera calibration for the US Central Intelligence Agency's Corona spy satellite program; in fact, they were used as references for aerial surveys through photogrammetry. The markers formed a square 16-by-16-mile (26 by 26 km) grid, and were maintained from 1959 to 1972. Some of the original markers can still be found on satellite maps and ground inspection. See .

Attributes	Values
rdf:type	Thing place dbo:Location schema:Place Human settlement populated place geo:SpatialThing settlement
rdfs:label	Casa Grande Photogrammetric Test Range (en)
rdfs:comment	The Casa Grande Photogrammetric Test Range is a test range established in the mid-1960s to test the dynamic performance of aerial survey cameras. The range consisted of consist of 272 concrete calibration markers embedded into the Earth's surface in and around Casa Grande, Arizona, United States. The markers are commonly (and erroneously) believed to have been used to aid camera calibration for the US Central Intelligence Agency's Corona spy satellite program; in fact, they were used as references for aerial surveys through photogrammetry. The markers formed a square 16-by-16-mile (26 by 26 km) grid, and were maintained from 1959 to 1972. Some of the original markers can still be found on satellite maps and ground inspection. See . (en)
foaf:name	Casa Grande Photogrammetric Test Range (en)
geo:lat	32.748329 (xsd:float)
geo:long	-111.757553 (xsd:float)
foaf:depiction
dct:subject	National Reconnaissance Office Casa Grande, Arizona Photogrammetry Buildings and structures completed in the 1960s Abandoned buildings and structures 1960s establishments in Arizona
Wikipage page ID	50167137 (xsd:integer)
Wikipage revision ID	1101121350 (xsd:integer)
Link from a Wikipage to another Wikipage	Casa Grande, Arizona Corona (satellite) Radiometric calibration Eloy, Arizona National Reconnaissance Office Casa Grande, Arizona Water extraction Central Intelligence Agency Laser designator Photogrammetry Buildings and structures completed in the 1960s M.A.S. Records Abandoned buildings and structures Aerial survey Transcontinental Airway System Photogrammetry Sonoran Desert National Reconnaissance Office 1960s establishments in Arizona Manhole Maltese cross Subsidence Survey mark
Link from a Wikipage to an external page	http://www.azcentral.com/search/corona%20satellite/ http://overpass-turbo.eu/s/Gs8 http://wikimapia.org/%23lang=en&lat=32.835479&lon=-111.860054&z=20&m=b&show=/37679142/First-Corona-Satellite-Calibration-Target https://www.google.com/maps/d/edit%3Fmid=1IudNrZA1xnpWjKlscWlSakQHDKo https://www.google.com/maps/d/u/0/viewer%3Fmid=1CkeC8CvojF3V_89o9_C9DL9OFfY&ll=32.78280478038547%2C-111.58987615593128&z=11 https://www.npr.org/2016/10/11/496567104/decades-old-mystery-put-to-rest-why-are-there-xs-in-the-desert https://www.thespacereview.com/article/4094/1
sameAs	Casa Grande Photogrammetric Test Range Casa Grande Photogrammetric Test Range
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thumbnail	wiki-commons:Special:FilePath/Casa_Grande_Test_Range_target_dimensions.jpg?width=300
image map	Casa Grande Test Range target dimensions.jpg (en)
map caption	Target dimensions of the Casa Grande Test Range crosses (en)
official name	Casa Grande Photogrammetric Test Range (en)
georss:point	32.74833 -111.757555
has abstract	The Casa Grande Photogrammetric Test Range is a test range established in the mid-1960s to test the dynamic performance of aerial survey cameras. The range consisted of consist of 272 concrete calibration markers embedded into the Earth's surface in and around Casa Grande, Arizona, United States. The markers are commonly (and erroneously) believed to have been used to aid camera calibration for the US Central Intelligence Agency's Corona spy satellite program; in fact, they were used as references for aerial surveys through photogrammetry. The markers formed a square 16-by-16-mile (26 by 26 km) grid, and were maintained from 1959 to 1972. Some of the original markers can still be found on satellite maps and ground inspection. See . (en)
prov:wasDerivedFrom	wikipedia-en:Casa_Grande_Photogrammetric_Test_Range?oldid=1101121350&ns=0
page length (characters) of wiki page	8639 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Casa_Grande_Photogrammetric_Test_Range
geo:geometry	POINT(-111.75755310059 32.748329162598)
is Link from a Wikipage to another Wikipage of	Casa Grande, Arizona Casa Grande Calibration Targets Corona Satellite Calibration Targets
is Wikipage redirect of	Casa Grande Calibration Targets Corona Satellite Calibration Targets
is foaf:primaryTopic of	wikipedia-en:Casa_Grande_Photogrammetric_Test_Range

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