嫩江流域界线及区域坡度、地形起伏度和高程分类数据集

嫩江指松花江源头至三岔河段。嫩江流域横跨大兴安岭、松嫩平原和小兴安岭等多个地貌单元。在SRTM DEM 90 m数据基础上，结合嫩江流域水系资料初步确定嫩江流域边界，并利用Google Earth影像目视修订，得到嫩江流域界线数据。该流域位于119.40︒E-127.89︒E，44.02︒N-51.66︒N，流域面积29.06×10^4 km^2，周长4067.54 km。利用DEM数据，计算得到流域坡度、地形起伏度，最后将高程、坡度和地形起伏度进行分类。将高程数据分成5类，依次为1（<200 m）、2（200-500 m）、3（500-700 m）、4（700-1000 m）、5（>1000 m）；将坡度分成7类，依次为1（0-1°）、2（1-3°）、3（3-7°）、4（7-15°）、5（15-25°）、6（25-35°）、7（>35°）；将地形起伏度分成8类，依次为1（0-5）、2（5-10）、3（10-20）、4（20-30）、5（30-50）、6（50-80）、7（80-100）、8（>100）。本数据集包括：（1）嫩江流域的界线数据；（2）高程分类数据；（3）坡度及分类数据；（4）地形起伏度及分类数据。栅格数据的空间分辨率是90 m 。数据集存储为.kmz、.shp和GRID格式，由77个文件组成，数据量为436 MB（压缩为2个文件，116 MB）。

The Nenjiang River refers to the segment from the headwaters of the Songhua River to the Sancha River confluence. The Nenjiang River Basin spans multiple geomorphic units including the Greater Khingan Mountains, Songnen Plain, and Lesser Khingan Mountains. Based on the SRTM 90 m DEM data and combined with the hydrological network data of the Nenjiang River Basin, the basin boundary was initially determined, and then visually revised using Google Earth imagery to obtain the final boundary dataset of the Nenjiang River Basin. This basin is located between 119.40°E–127.89°E and 44.02°N–51.66°N, with a basin area of 29.06×10^4 km² and a perimeter of 4067.54 km. Using the DEM data, the basin slope and terrain relief were calculated, and then the elevation, slope, and terrain relief were classified respectively. The elevation data was divided into 5 categories, specifically 1 (<200 m), 2 (200–500 m), 3 (500–700 m), 4 (700–1000 m), and 5 (>1000 m); the slope data was divided into 7 categories: 1 (0–1°), 2 (1–3°), 3 (3–7°), 4 (7–15°), 5 (15–25°), 6 (25–35°), and 7 (>35°); the terrain relief was divided into 8 categories: 1 (0–5), 2 (5–10), 3 (10–20), 4 (20–30), 5 (30–50), 6 (50–80), 7 (80–100), and 8 (>100). This dataset includes: (1) Boundary data of the Nenjiang River Basin; (2) Elevation classification data; (3) Slope and slope classification data; (4) Terrain relief and terrain relief classification data. The spatial resolution of the raster data is 90 m. The dataset is stored in .kmz, .shp, and GRID formats, consisting of 77 individual files, with a total data size of 436 MB (compressed into 2 files with a size of 116 MB).

搜集汇总

背景与挑战

背景概述

该数据集基于SRTM DEM 90米数据，生成了嫩江流域的边界、高程、坡度和地形起伏度的分类数据。高程分为5个等级（<200米至>1000米），坡度分为7个等级（0-1°至>35°），地形起伏度分为8个等级（0-5至>100），空间分辨率为90米，数据格式包括.kmz、.shp和GRID，总数据量436 MB。数据集适用于地理信息系统分析和地形研究，覆盖嫩江流域的多个地貌单元。