The frequency degree of being visualized was determined by using the landutilizationmap, numerical model of topography and the incident angle of sight.
通过地形及土地利用图、数值地形模型和视线入射角来确定景观的被视频度；
2
The compilation of this map provided scientific basis for controlling soil erosion of sloping cultivated land and its rational utilization in the region.
该图的编制为治理本区坡耕地水土流失、合理利用坡耕地资源提供了科学依据。
3
Land use map is the basis of land resource conservation, management and utilization.