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TitleImpact of no GCP on elevation extraction from WorldView stereo data
AuthorToutin, T; Schmitt, C V; Wang, H
SourceISPRS Journal of Photogrammetry and Remote Sensing vol. 72, 2012 p. 73-79,
Alt SeriesEarth Sciences Sector, Contribution Series 20120384
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
NTS21L/14; 21M/03
Lat/Long WENS -71.5000 -71.0000 47.2500 46.7500
Subjectsgeophysics; remote sensing; satellite imagery; models; modelling; photogrammetric surveys; photogrammetric techniques; LiDAR
Illustrationssatellite images; plots; models; flow charts; tables
ProgramRemote Sensing Science
Released2012 08 01
AbstractA hybrid model based on 3D deterministic Toutin's model developed at the Canada Centre for Remote Sensing and taking full advantages of the image metadata was used to geometrically process World- View-1 and -2 stereo images without in situ ground control points (GCPs) collection. Elevations were thus extracted and compared to 0.2-m accurate lidar elevation data to see the impact of no-GCP. Elevations linear errors with 68% confidence level (LE68) computed over bare surfaces were 2.6 m and 2.1 m for WorldView-1 and -2, respectively with small biases. The not-significant difference in LE68 (around 10 - 20 cm), when compared to the solution using accurate GCPs, will offer strong advantages of no-control collection in operational conditions, mainly in remote and harsh environments or when cartographic or ground control data do not exist.

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