CCZO -- Geomorphology -- Gully Boundaries -- Calhoun CZO -- (2015-2015)

To develop and calibrate a systematic approach for gullies identification from Digital Elevation Models we measured morphological characteristics of gullies at the Calhoun CZO. Gullies reference perimeters have been defined by a Georgia Tech team during a field survey (June 29-30 2015) through a visual identification of the change in slope at the top of the gully walls (i.e. the point where the relatively flat gully margins starts to slope into the gully). The perimeter coordinates have been acquired using a differential GPS total station (Topcon Hiper Lite +) in RTK (real Time Kinematic) mode with a horizontal accuracy of about 25 cm.

为构建并校准一套从数字高程模型中识别沟壑的系统方法，我们在Calhoun区域控制点（CZO）测量了沟壑的形态特征。沟壑参考周长由乔治亚理工学院团队在2015年6月29日至30日的实地考察期间通过观察沟壑壁顶部坡度变化（即相对平坦的沟壑边缘开始向沟壑倾斜的点）进行视觉识别而定义。周长坐标采用差分GPS全站仪（Topcon Hiper Lite +）在实时动态（RTK）模式下获取，水平精度约为25厘米。