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Estimation and propagation of error in measurements of river channel movement from aerial imagery
Author(s) -
Mount Nicholas,
Louis John
Publication year - 2005
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.1172
Subject(s) - aerial photography , channel (broadcasting) , independence (probability theory) , aerial photos , geology , movement (music) , aerial imagery , estimation , remote sensing , hydrology (agriculture) , geodesy , computer science , statistics , mathematics , telecommunications , geotechnical engineering , management , economics , philosophy , aesthetics
Rates of river channel migration or widening are only valid if it can be demonstrated that the amount of change in the measured parameters exceeds the measurement errors. However, it is still uncommon to see estimates of errors presented alongside rates of river channel change measured from aerial photography. Here, detailed methods are presented for the estimation of errors in quantifying channel migration rates that can be easily applied to GIS‐based analysis of planform change. In addition, the impact of relaxing assumptions regarding error independence between image dates and systematic registration errors is presented and discussed. Copyright © 2005 John Wiley & Sons, Ltd.