ASPA135 2011 6 band reflectance map at 3cm resolution

This record contains an orthomosaic of multispectral imagery collected by a 6 band camera (Tetracam Mini-MCA - http://www.tetracam.com/). Data was collected in February 2011 over the ASPA135 moss bed. The camera was carried aboard a small Unmanned Aircraft System (UAS) that flew a grid pattern over the area at 50m above ground level. Orthomosaic was georeferenced via ground control points placed in ASPA135 moss bed area and with their location then measured with an RTK GPS that was running corrections from a local base station. The file provided in this dataset is a 6 band binary file with an associated text header file such that software, such as ENVI or ArcGIS, can easily open the file for display. Pixel values are in reflectance percentage, i.e. 0.0-1.0, all information as to the dimensions and georeferencing of the data can be found in the header file.

本数据集包含由6波段相机（Tetracam Mini-MCA，详情见http://www.tetracam.com/）采集的多光谱影像正射镶嵌图。数据采集于2011年2月，覆盖ASPA135苔藓床区域。该相机搭载于小型无人机系统（Unmanned Aircraft System，UAS），以50米的离地高度在研究区域上空沿网格航线完成数据采集作业。本正射镶嵌图通过布设于ASPA135苔藓床区域内的地面控制点完成地理配准，控制点坐标由接收本地基准站差分改正信号的实时动态差分GPS（Real-Time Kinematic GPS，RTK GPS）测定。本数据集提供的文件为6波段二进制文件，附带关联的文本头文件，可通过ENVI、ArcGIS等专业软件直接打开并显示。像素值以反射率百分比形式存储，取值范围为0.0至1.0；数据的尺寸、地理配准等全部相关信息均可在头文件中查阅。