Hillshades for the main 8 Hawaiian Islands

These hillshade datasets were derived from USGS 7.5' DEM Quads for the main 8 Hawaiian Islands. Individual DEM quads were first converted to a common datum, and vertical unit, and subsequently mosaicked in ArcGIS 9.x. The hillshade were created from these DEMs using the Hillshade function in ArcGIS 9.2's Spatial Analyst Extension. For all the hillshades, the altitude was set at 45, the Z fa...

本数据集源于美国地质调查局（USGS）提供的7.5分尺度的主要夏威夷群岛数字高程模型（DEM）四分图。首先，将单个DEM四分图转换至统一基准和垂直单位，随后在ArcGIS 9.x软件中实施镶嵌处理。利用ArcGIS 9.2的Spatial Analyst扩展中的阴影渲染功能，基于上述DEM数据生成了阴影图。对于所有阴影图，设定海拔高度为45，Z方向因子（Z factor）设定值等参数。