Ice velocities of Hagen Glacier, Greenland derived from Landsat feature tracking
Ice velocities from Hagen Glacier derived from Landsat using the ImGRAFT feature tracker. ----------------------------------------------------------------------------------------- Processed by Aslak Grinsted 2018 For a project lead by Anne Solgaard The folder contains a matlab file for each image pa...
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| Format: | Dataset |
| Language: | English |
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University of Copenhagen
2019
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| Online Access: | https://dx.doi.org/10.17894/ucph.19fcf572-1d5f-45b5-9107-c9ceae8ce819 https://erda.ku.dk/public/archives/da7c5d3737fafeec69d9dd9fa3b88e1f/published-archive.html |
| Summary: | Ice velocities from Hagen Glacier derived from Landsat using the ImGRAFT feature tracker. ----------------------------------------------------------------------------------------- Processed by Aslak Grinsted 2018 For a project lead by Anne Solgaard The folder contains a matlab file for each image pair. The filenames has the form: V_Hagen_[Ayear][Ajulianday]-[Byear][Bjulianday]_[path][row] Each file has these variables: tA: A matlab datenum for sceneA tB: A matlab datenum for sceneB fA: filename of scene A fB: filename of scene B px: [98×168 double] Grid of Easting coordinates py: [98×168 double] Grid of Northing coordinates Ia: geotiffinfo of sceneA - contains projection information Ib: geotiffinfo of sceneA - contains projection information dt: days between scene A and B C: Simililarity score of templatematch (see help on imgraft templatematch function) Cnoise: Background similiarity score of templatematch snr: C/Cnoise options: Options for ImGRAFT templatematch function (see help on imgraft templatematch function) dx: Easting displacement (already divided by dt) dy: Northing displacement (already divided by dt) lat: Geographical coords for px,py lon: Geographical coords for px,py The displacements have not been corrected for bad georeferencing. The ice velocities has been extracted along a flowline and corrected for bare rock displacement. These data can be found in the file: hagen-aslakVs.mat. This file contains these variables: AnneLine: definition of flowline Vextract: Velocities along flowline. The first two columns hold the datenums of scene A and scene B. dist: distance along line xline: projected coordinates of line |
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