mqdefault.jpg。ESurf - Short communication: The Topographic Analysis Kit (TAK。Digital Soil Mapping with R – digital-terrain-analysis。GISと関連技術を用いた地形分析の唯一の参考書。。Title:Terrain Analysis-Principles and ApplicationsEditors: John P. Wilson, John C. GallantPublisher: John Wiley & Sons,inc.