By Eric Hardin, Helena Mitasova, Laura Tateosian, Margery Overton
This SpringerBrief provides the foundations, tools, and workflows for processing and studying coastal LiDAR facts time-series. strong tools for computing excessive solution electronic elevation versions (DEMs) are brought in addition to raster-based metrics for overview of topographic switch. An leading edge method of characteristic extraction and dimension of characteristic migration is via tools for estimating quantity swap and sand redistribution mapping. easy equipment for power typhoon affects and inundation trend research also are lined, besides visualization concepts to aid research of coastal terrain characteristic and floor dynamics. Hands-on examples in GRASS GIS and python scripts are supplied for every form of research and visualization utilizing public LiDAR info time-series. GIS-based research of Coastal Lidar Time-Series is perfect for professors and researchers in GIS and earth sciences. Advanced-level scholars attracted to desktop purposes and engineering also will locate this short a worthy resource.
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Additional info for GIS-based Analysis of Coastal Lidar Time-Series
2009). 2) k k The space bounded by the core and envelope surfaces defines a dynamic layer. For a sandy coastal environment, typical for barrier islands, the core surface represents a boundary between a dynamic layer and a stable sand volume that has not moved during the entire study period. t1 ; tn /. © The Author(s) 2014 E. 1007/978-1-4939-1835-5__3 27 28 3 Raster-Based Analysis Fig. series command with the method parameter set to minimum compute the core surface and maximum to compute the envelope surface (Fig.
Crossshore transect spacing is decided by the scale of shoreline variability that is intended to be measured; Variability on a scale smaller than transect spacing contributes to uncertainty in the measurement. In this way, measuring shoreline along a transect is sensitive to transect placement. In this section, shoreline location is measured by calculating the area of land above MHW within the shoreline band. This is done for each 50 m wide segment. Then, the area is divided by the width of the segment giving an average displacement of the shoreline from the core shoreline.
I; j / defined by Eqs. 4). ic ; jc / can be used to perform an automated query of the entire DEM time series. # Purpose: Identify structures that were either # built or destroyed during the study period. # Convert raster structures to vector areas. g, telephone poles. clean input=NH_houses_vect \ output=NH_houses_vect_clean tool=rmarea thresh=15 \ --o # Convert house centroid to point location. type input=NH_houses_centroid \ output=NH_houses_point from_type=centroid \ to_type=point --o # Sample dem time series.
GIS-based Analysis of Coastal Lidar Time-Series by Eric Hardin, Helena Mitasova, Laura Tateosian, Margery Overton