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7 results for “geomorphic change detection”
River Feshie, Scotland - Geomorphic Change Detection - Example Dataset
<p>A simple<a href="https://gcd.riverscapes.net/Tutorials/example-data-sets.html"> Example GCD Dataset </a>illustrating topographic change detection from five years of repeat monitoring of the Feshie from 2003 to 2007. Used in Tutorials (e.g. <a href="https://gcd.riverscapes.net/Tutorials/ChangeDetection/GCDwithFIS.html">FIS Error Modelling</a>) and appears in:</p> <ol> <li>Wheaton JM, Brasington J, Darby SE, Sear DA, Vericat D‡., and Kasprak A*. 2013. <a href="https://www.researchgate.net/publication/242653748_Morphodynamic_signatures_of_braiding_mechanisms_as_expressed_through_change_in_sediment_storage_in_a_gravel-bed_river">Morphodynamic signatures of braiding mechanisms as expressed through change in sediment storage in a gravel-bed river</a>. Journal of Geophysical Research - Earth Surface. DOI: <a href="http://dx.doi.org/10.1002/jgrf.20060">10.1002/jgrf.20060</a>.</li> <li>Wheaton JM, Brasington J, Darby SE, Merz JE, Pasternack GB, Sear DA and Vericat D‡. 2010. <a href="https://www.researchgate.net/publication/227526758_Linking_Geomorphic_changes_to_Salmonid_habitat_at_a_scale_relevant_to_fish">Linking Geomorphic Changes to Salmonid Habitat at a Scale Relevant to Fish. River Research and Applications</a>.26: 469-486. DOI: <a href="http://dx.doi.org/10.1002/rra.1305">10.1002/rra.1305</a>.</li> </ol> <p>. Dataset is from:</p> <ul> <li>700m braided gravel bed river in the <a href="https://www.google.com/maps/place/57%C2%B000'41.4%22N+3%C2%B054'16.1%22W/@57.0099348,-3.9000104,6821m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d57.01149!4d-3.90446">Scottish Cairngorm mountains</a>.</li> <li>5 annual surveys</li> <li>Mix of RTKGPS and Total Station</li> <li>1m cell resolution</li> </ul> <p>Dataset includes raw data to run exercises, as well as full *.gcd projects that can be opened. </p>
Rees River, New Zealand - Geomorphic Change Detection - Example Dataset
<p>A simple<a href="https://gcd.riverscapes.net/Tutorials/example-data-sets.html"> Example GCD Dataset </a>illustrating topographic change detection on a long (31 km) dataset. Great for learning about analyses with DEMs produced from a hybrid of survey types. Used in <a href="https://gcd.riverscapes.net/Tutorials/ErrorModelling/multimethoderror.html">Multi-Method Error Estimation Tutorial</a> and <a href="https://gcd.riverscapes.net/Tutorials/GeomorphicInterpretation/morphological-approach.html">Morphological Approach Tutorial</a>. This is part of the dataset from:</p> <ul> <li>2011. Richard Williams, James Brasington, Damia Vericat, Murray Hicks, Fred Labrosse, Mark Neal. Chapter Twenty - Monitoring Braided River Change Using Terrestrial Laser Scanning and Optical Bathymetric Mapping. Editor(s): Mike J. Smith, Paolo Paron, James S. Griffiths. Developments in Earth Surface Processes. Elsevier, Volume 15, Pages 507-532, ISSN 0928-2025. DOI: <a href="https://doi.org/10.1016/B978-0-444-53446-0.00020-3">10.1016/B978-0-444-53446-0.00020-3</a>.</li> </ul> <p>Dataset is from:</p> <ul> <li>2km of braided river near <a href="https://www.google.com/maps/place/44%C2%B046'38.6%22S+168%C2%B024'17.9%22E/@-44.7767196,168.3891697,7451m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-44.777379!4d168.404972">Queenstown, New Zealand</a></li> <li>Two LiDAR surveys</li> <li>0.5m cell resolution</li> <li><a href="https://s3-us-west-2.amazonaws.com/etalweb.joewheaton.org/GCD/GCD7/Tutorials/GeoTERM_Rees.zip">Download Full</a></li> <li><a href="https://s3-us-west-2.amazonaws.com/etalweb.joewheaton.org/GCD/GCD7/Tutorials/MaskOnly_MorphologicalApproach.zip">Download Morphological Only</a></li> </ul> <p>Dataset includes raw data to run exercises, as well as full *.gcd projects that can be opened. </p>
Ngaruroro River, New Zealand - Geomorphic Change Detection - Example Dataset
<p>A simple<a href="https://gcd.riverscapes.net/Tutorials/example-data-sets.html"> Example GCD Dataset </a>illustrating topographic change detection on a long (31 km) dataset. Great for learning about analyses with Directional Masks in GCD.</p> <p>Dataset is from:</p> <ul> <li>31km river on the <a href="https://www.google.com/maps/place/39%C2%B035'58.6%22S+176%C2%B043'23.7%22E/@-39.6060374,176.6490462,27291m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-39.599602!4d176.723239">north island of New Zealand</a></li> <li>Two LiDAR surveys</li> <li>2m cell resolution</li> </ul> <p>Dataset includes raw data to run exercises, as well as full *.gcd projects that can be opened. </p>
Sulphur Creek, California - Geomorphic Change Detection - Example Dataset
<p>A simple<a href="https://gcd.riverscapes.net/Tutorials/example-data-sets.html"> Example GCD Dataset </a>illustrating topographic change detection from a single flood event. Used in Tutorials (e.g. <a href="https://gcd.riverscapes.net/Tutorials/ChangeDetection/DoD-thresholding.html">DoD Thresholding</a>). Dataset is from </p> <ul> <li>300m of gravel bed river near <a href="https://www.google.com/maps/place/38%C2%B029'44.0%22N+122%C2%B028'09.0%22W/@38.4958086,-122.4803136,4904m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d38.49555!4d-122.469166">St. Helena California</a> that underwent a New Year's Eve flood in December 2005.</li> <li>Two surveys (Dec 2015 and Jan 2016)</li> <li>0.5m cell resolution</li> <li>Surveyed with hybrid of RTKGPS and Total Station</li> </ul>
Supplement - DEM of Difference Geomorphic Change Detection
<p>Using the 2013 OSMP lidar DEM and the newly created site DEMs, DEMs of difference (DODs) were calculated for each Site to show how the landscape has changed over a period of time (James et al. 2012). Because of differences in datums, datasets created here were offset from the 2013 dataset. As such, we selected five points on DODs in areas thought to be stable (e.g., bedrock outcrops), avoiding edges of rasters, as these values are not an accurate representation of the datum shift. The five points were then averaged and DODs shifted accordingly such that DODs could be interpreted as deposition (positive values), no change, or erosion (negative values). Artifacts within the Structure from Motion data made some absolute change values unreasonable. Therefore, to aid in visual interpretation of erosion and deposition, we chose to use relative change by normalizing the ranges of DOD values with the equation: “((DOD dataset – minimum value)/ (maximum value- minimum value)) - 0.5”. These values were interpreted from -0.5 (erosion) to 0 (no change) to 0.5 (deposition). DODs can be found in this repository.</p>
Shotover River, New Zealand - Geomorphic Change Detection - Example Dataset
<p>A simple<a href="https://gcd.riverscapes.net/Tutorials/example-data-sets.html"> Example GCD Dataset </a>illustrating topographic change detection on the fan of the Shotover River. Great for illustrating GCD with rather large datasets.</p> <ul> <li>2.5km gravel bed, braided river near <a href="https://www.google.com/maps/place/45%C2%B000'35.1%22S+168%C2%B045'56.3%22E/@-45.0103208,168.7612985,3923m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d-45.009756!4d168.765638">Queenstown, New Zealand</a></li> <li>Two LiDAR surveys</li> <li>1m cell resolution</li> </ul> <p>Dataset includes raw data to run exercises, as well as full *.gcd projects that can be opened. </p>
River Dee, Scotland - Geomorphic Change Detection - Example Dataset
<p>A simple<a href="https://gcd.riverscapes.net/Tutorials/example-data-sets.html"> Example GCD Dataset </a>illustrating topographic change detection following a major flood in Scotland. Used in the <a href="https://gcd.riverscapes.net/Workshops/2018/Aberdeen/">GeoTerm Aberdeen Workshop</a>.</p> <p>Dataset is from:</p> <ul> <li>6km of channel near <a href="https://www.google.com/maps/place/57%C2%B002'53.9%22N+3%C2%B003'09.3%22W/@57.0490441,-3.0938372,8093m/data=!3m1!1e3!4m5!3m4!1s0x0:0x0!8m2!3d57.048317!4d-3.052569">Ballater, Scotland</a></li> <li>Two LiDAR surveys</li> <li>1m cell resolution</li> </ul> <p>Dataset includes raw data to run exercises, as well as full *.gcd projects that can be opened. </p>
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