Hydrology Grid for Green Lakes Valley, Niwot Ridge LTER Project Area, Colorado

Streams and lakes were digitzed from the USGS 1:24000 quadrangles covering the Indian Peaks area. The data were originally rectified to the 30 m USGS DEM, then re-rectified to the WGS84 datum using 10 ground control points (all on shorelines of water bodies) and resampled to 10 m resolution. The RMS error of the rectification was 1.15 m. The coding for the hydrographic data is listed below. NOTE: This EML metadata file does not contain important geospatial data processing information. Before using any NWT LTER geospatial data read the arcgis metadata XML file in either ISO or FGDC compliant format, using ArcGIS software (ArcCatalog > description), or by viewing the .xml file provided with the geospatial dataset.

本数据集的溪流与湖泊数据源自覆盖印第安峰（Indian Peaks）区域的美国地质调查局（USGS）1:24000比例尺标准地形图幅。该数据最初已校正至30米分辨率的美国地质调查局数字高程模型（DEM），随后以10个均布设於水体岸线的地面控制点为基准，重新校正至WGS84坐标系，并重采样至10米分辨率。此次校正的均方根误差（RMS error）为1.15米。水文数据的编码规则详见下文。注意：本EML元数据文件未包含关键的地理空间数据处理信息。在使用任何NWT LTER地理空间数据前，请通过ArcGIS软件（ArcCatalog > 描述信息）查看符合ISO或FGDC标准格式的ArcGIS元数据XML文件，或直接查阅随地理空间数据集一同提供的.xml文件。