Accession Number : AD0014975


Title :   AN INTEGRATED SELECTIVE KEY FOR THE PHOTO IDENTIFICATION OF IRRIGATION STRUCTURES OF A GRAVITY-FLOW IRRIGATION SYSTEM


Corporate Author : NORTHWESTERN UNIV EVANSTON IL


Personal Author(s) : Kohn, Clyde F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/014975.pdf


Report Date : Jun 1953


Pagination or Media Count : 62


Abstract : Studies were carried out of the aerial photographic identification of structures associated with the Greenfields Irrigation District in Montana. Photointerpretation of vertical stereopairs was integrated with detailed field observations of gravity-flow irrigation structures and associated farm practices. Three elements were determined as being necessary in the identification of such structures: (1) a key for the identification of storage facilities; (2) a key for identifying the carriage system structures; and (3) a key for the identification of distribution features.


Descriptors :   *PHOTOGRAPHIC ANALYSIS , *IRRIGATION SYSTEMS , *AERIAL PHOTOGRAPHY , IDENTIFICATION , MONTANA , STORAGE , STRUCTURES , FACILITIES , AERIAL RECONNAISSANCE


Subject Categories : Cartography and Aerial Photography


Distribution Statement : APPROVED FOR PUBLIC RELEASE