3d-DEM optimization-Zagros Ranges [very small, nearest neighbour resampling]

The ALOS, SRTM and ASTER GDEM representation of the study area. The study area is bounded by latitude and longitude in the range 27.1107° to 27.5555° and 54.2362° to 54.6810° respectively corresponding to the central portion of Zagros Ranges in Iran where collision of the Arabian shield with he Eurasian Plate has shortened and thickened the crust to produce a spectacular mountainous physiography. The data are posted on a 1 arc-second grid and horizontally referenced to the 1984 World Geodetic System (WGS84) while the 1996 Earth Gravitational Model (EGM96) geoid is the vertical datum. The very small study area of Zagros Ranges. The resampling (matching) of the 3 DEMs is rather bad (nearest neighbor method was applied)

本数据集包含研究区域的ALOS、SRTM及ASTER GDEM地形表达数据。研究区域的纬度范围为27.1107°至27.5555°，经度范围为54.2362°至54.6810°，对应伊朗扎格罗斯山脉中部区域；该区域因阿拉伯陆盾与欧亚板块发生碰撞，地壳出现缩短与增厚，形成了壮观的山地地貌。数据采用1弧秒网格布设，水平基准为1984世界大地测量系统（World Geodetic System 1984, WGS84），垂直基准采用1996地球重力模型（Earth Gravitational Model 1996, EGM96）大地水准面。本次研究区域为扎格罗斯山脉的极小范围区块。三款数字高程模型（Digital Elevation Model, DEM）的重采样（匹配）效果较差，本次配准采用了最近邻法。