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Low Altitude Aerial Photography Applications for Digital Surface Models Creation in Archaeology
Author(s) -
MartínezdelPozo JoséÁngel,
CerrilloCuenca Enrique,
SalasTovar Ernesto
Publication year - 2013
Publication title -
transactions in gis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 63
eISSN - 1467-9671
pISSN - 1361-1682
DOI - 10.1111/j.1467-9671.2012.01361.x
Subject(s) - orthophoto , aerial photography , photogrammetry , stereoscopy , altitude (triangle) , similarity (geometry) , photography , remote sensing , geography , reliability (semiconductor) , digital surface , aerial photos , spatial analysis , index (typography) , computer science , computer vision , mathematics , art , image (mathematics) , visual arts , power (physics) , physics , geometry , lidar , quantum mechanics , world wide web
Low Altitude Aerial Photography ( LAAP ) is based on the use of small flying platforms to take photographs from very low altitudes. The acquisition of series of Digital Surface Models ( DSM s) and orthoimages through photogrammetric and orthorectification processes is one of the main applications. The use of this technique in archaeological sites provides very precise and valuable data, but knowing the reliability of the method is a key to ensuring that the results are valid, since the repeatability of the method is fundamental to multitemporal studies. The present work shows an analysis of the similarity of DSMs obtained from different stereoscopic pairs from the same area. The reliability of the models has been assessed by calculating the Standard Deviation ( STD ) of the altitude values from the models, to obtain maps displaying the differences among them. Finally, the STD values' spatial distribution has been studied to assess if spatial autocorrelation exists by means of the Moran's Index and Anselin's Local Moran's Index. Results showed good similarity among the models and revealed clearly those areas where the model must be edited.