中国陆地高精度地貌类型的划分

Accurate division of geomorphological types in China

针对已有的地貌单元无论在精度上,还是在覆盖的全面性上,均难以满足地理国情监测需求的问题,该文在数字地貌类型遥感综合解析方法的基础上,提出了利用高精度DEM、高分辨影像,以1∶100万地貌类型数据界线为基础进行地貌类型界线精确定位的技术方法和流程,设计了基于地貌类型的统计分析内容指标与方法,首次形成了定位精度达到1∶25万比例尺制图精度的全国地貌类型数据集,为查清并发布我国地形地貌家底提供了数据和技术支撑,可为更高精度地貌类型的划分提供技术借鉴。

Aiming at the problem that the existing geomorphic units can not meet the needs of geographic national conditions monitoring.The technical method and process of accurate positioning of geomorphological type boundaries were put forward based on 1∶1 000 000 scale geomorphological data using high-precision DEM and high-resolution images,the content index and method of statistical analysis were designed based on geomorphological types,and geomorphological types data was formed for the first time in China with a mapping accuracy of 1∶250 000 scale,which provides data and technical support for publishing the geomorphological background of China,and provides technical reference for the division of more precise geomorphological types.