Abbreviated Journal Title
Remote Sens.
Keywords
SEA-LEVEL RISE; ACCURACY ASSESSMENT; SALT MARSHES; WETLANDS; IMPACT; RADAR; Remote Sensing
Abstract
Digital elevation models (DEMs) derived from airborne lidar are traditionally unreliable in coastal salt marshes due to the inability of the laser to penetrate the dense grasses and reach the underlying soil. To that end, we present a novel processing methodology that uses ASTER Band 2 (visible red), an interferometric SAR (IfSAR) digital surface model, and lidar-derived canopy height to classify biomass density using both a three- class scheme (high, medium and low) and a two-class scheme (high and low). Elevation adjustments associated with these classes using both median and quartile approaches were applied to adjust lidar-derived elevation values closer to true bare earth elevation. The performance of the method was tested on 229 elevation points in the lower Apalachicola River Marsh. The two-class quartile-based adjusted DEM produced the best results, reducing the RMS error in elevation from 0.65 m to 0.40 m, a 38% improvement. The raw mean errors for the lidar DEM and the adjusted DEM were 0.61 +/- 0.24 m and 0.32 +/- 0.24 m, respectively, thereby reducing the high bias by approximately 49%.
Journal Title
Remote Sensing
Volume
7
Issue/Number
4
Publication Date
1-1-2015
Document Type
Article
DOI Link
Language
English
First Page
3507
Last Page
3525
WOS Identifier
ISSN
2072-4292
Recommended Citation
Medeiros, Stephen; Hagen, Scott; Weishampel, John; and Angelo, James, "Adjusting Lidar-Derived Digital Terrain Models in Coastal Marshes Based on Estimated Aboveground Biomass Density" (2015). Faculty Bibliography 2010s. 6700.
https://stars.library.ucf.edu/facultybib2010/6700
Comments
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