黑河流域河流分布数据集（2009）

数据概况：本套数据主要包括黑河流域内常年河、时令河、河道干河、地面干渠、地面支渠等水系状况，数据基准年为2009年。 数据制备过程：根据1:10万地形图以及2009年的TM遥感影像数字化获得的。 数据内容说明：数据主要有三个重要属性即河流等级（GRADE）、河流编码（GB）、河流名称（NAME_CH），其中河流分级是根据strahler分级方式进行的，干流最后的等级达到七级。 河流编码是根据国家基础地理信息要素字典为标准的。采用基础地理信息要素数据字典标准。Data Overview: This dataset primarily documents the water system conditions within the Heihe River Basin, encompassing perennial rivers, ephemeral rivers, dry river courses, surface main canals, surface branch canals and other relevant water features. The reference year of the dataset is 2009. Data Preparation Process: The dataset was obtained through digitization based on 1:100,000 scale topographic maps and 2009 TM remote sensing images. Data Content Description: The dataset has three core attributes: river order (GRADE), river code (GB) and river name (NAME_CH). The river grading follows the Strahler stream ordering method, and the highest order of the main stem reaches Level 7. The river code complies with the National Fundamental Geographic Information Elements Dictionary, namely the Data Dictionary Standard for Fundamental Geographic Information Features.