Title :
Amery Ice Shelf Digital Elevation Model from GLAS and GMT
Author :
Shi, Hongling ; Du, Zongliang ; Lu, Yang ; Hu, Xiaogang ; Ke, Xiaoping
Author_Institution :
Key Lab. of Dynamic Geodesy, CAS, Wuhan, China
Abstract :
The geoscience laser altimeter system (GLAS) on the ice cloud and land elevation satellite spacecraft provided a large amount of data on the topography of polar ice area. It is possible to create high resolution digital elevation models (DEMs) from this data by using data interpolation techniques. Five interpolation algorithms were picked to be tested on GLAS data by employing the Generic Mapping Tools and Surfer: nearest neighbor interpolation, surface, triangular, block kriging, and inverse distance to a power. These methods were applied to the GLAS data of Amery ice shelf for qualitative analysis. We calculated the mean absolute error between the interpolated DEM and the original data. Also, execution speeds were measured for the five algorithms. The surface method shows high performance both quantitatively and qualitatively to other methods tested.
Keywords :
altimeters; geophysical signal processing; geophysical techniques; glaciology; interpolation; remote sensing by laser beam; Amery ice shelf digital elevation model; Generic Mapping Tools; data interpolation technique; geoscience laser altimeter system; ice cloud; interpolation algorithms; inverse distance; land elevation satellite spacecraft; nearest neighbor interpolation; polar ice area topography; Clouds; Digital elevation models; Geoscience; Ice shelf; Interpolation; Laser modes; Satellites; Space vehicles; Surface topography; Testing; Digital Elevation Model; Generic Mapping Tools; ice shelf; interpolation;
Conference_Titel :
Intelligent Information Technology Application, 2009. IITA 2009. Third International Symposium on
Conference_Location :
Nanchang
Print_ISBN :
978-0-7695-3859-4
DOI :
10.1109/IITA.2009.313