巢湖流域1:25万分级水系数据集（2002年）

该数据集为巢湖流域25万水系分级数据，含有水系名称、编码、级别等信息。该数据的特点为：每条河流在空间上都是完整的要素，每条河流源头进行了核定，河流流向明确；结合子流域特征，按照河流长度大小，对其主干支流进行了划分，河网层次明确；河流编码在《中国河流名称代码》（SL 249-1999）基础上进行了扩充，扩大可编码的河流总量，编码同时反映出河流的主干支流和河流级别，满足中小尺度流域研究的需要。该数据为中、小尺度流域或区域研究服务，构建了正确可操作的河网。
数据内容包括1个shp文件，为线图层矢量数据，“chaohu_25_Clip.shp”。

This dataset is a 1:250,000-scale hierarchical river network dataset for the Chaohu Lake Basin, containing information such as river system names, codes, and hierarchical levels. The characteristics of this dataset are as follows: Each river is a complete spatial feature, with the source of each river formally verified and the flow direction clearly defined; based on sub-basin characteristics and river length, main streams and tributaries are classified, forming a clearly defined hierarchical structure of the river network. The river coding system is expanded based on the *Code for Chinese River Names* (SL 249-1999), increasing the total number of codable rivers. The coding simultaneously reflects the main stream/tributary status and hierarchical level of the rivers, meeting the research needs of medium and small-scale basins. This dataset serves medium and small-scale basin or regional research, and has established a correct and operable river network.
The dataset includes one shapefile, which is a line-layer vector data file named "chaohu_25_Clip.shp".

搜集汇总

背景与挑战

背景概述

该数据集是2002年巢湖流域的1:25万分级水系矢量数据，包含水系名称、编码和级别等信息，每条河流空间完整、源头核定且流向明确。其特点在于基于河流长度划分主干支流，河网层次清晰，并在《中国河流名称代码》基础上扩充编码，以支持中小尺度流域研究的需要，数据质量可靠。