EcoRRAP Digital Surface Models

The current digital surface models (DSMs) represent scaled, 3D, representations of benthic communities at EcoRRAP study sites. DSMs are generated from raw imagery collected by divers (see SOP #14, Reef monitoring sampling methods | AIMS) and processed using photogrammetry software Agisoft Metashape. DSMs can be used to extract a range of data describing 3D habitat characterstics at both plot and colony scale, including: rugosity, surface area, and volume. Comparison of DSMS between years can also be used to quantify changes in the above metrics at plot scales and to measure 3D demographic rates of individual colonies (e.g. 3D growth and partial mortality).

本数据集收录的数字表面模型（Digital Surface Models, DSMs）为EcoRRAP研究样地底栖生物群落的缩放型三维表征。DSMs由潜水员采集的原始影像生成（详见标准作业程序第14号：《珊瑚礁监测采样方法》| AIMS），并采用Agisoft Metashape摄影测量软件完成处理。DSMs可用于提取样地与群体尺度下描述三维栖息地特征的多组数据，包括粗糙度（rugosity）、表面积与体积。通过对比不同年份的DSMs，还可量化样地尺度下上述指标的变化，并测算单个珊瑚群体的三维种群动态速率（如三维生长量与局部死亡情况）。