第三次全国国土调查土地利用矢量数据栅格化方法

第三次全国国土调查县级土地利用图斑层包含利用类型、耕地类型、坡度等级、种植属性等多属性信息，将县级土地利用矢量数据集成栅格化形成全国无缝的多尺度、多专题栅格产品存在一定技术难度。本文针对第三次全国国土调查土地利用栅格产品应用需求，探讨了多属性综合编码、全国基础地理网格框架、栅格化产品数据模型、矢量栅格化等技术方法，建立了全国土地利用栅格产品生产流程，开展了全国多尺度、多专题土地利用栅格产品生产验证。结果表明:本文方法能够实现第三次全国国土调查土地利用矢量图斑多属性信息集成栅格化和全国多尺度、多专题土地利用栅格产品工程化生产，可为今后的国土调查土地利用栅格产品生产和共享应用提供支撑。

Vector rasterization method of national land use data in the third national land survey

The third national land survey county-level land use map layer contains multi-attribute information such as land use type, cultivated land type,slope grade,planting attribute,etc. It is difficult to integrate the county-level land use vector data to form a serials of national seamless multi-scale and multi- topic raster products. According to the application requirements of land use raster products in the third national land use survey,this paper discusses the technical methods of multi-attribute integrated coding,national basic geographic grid framework,raster product data model and rasterization,establishes the production flow of land use raster products in China,and conducts the production verification of multi-scale and multi-thematic land use raster products in China. The results show that the method can be used to rasterize the third national land use vector map to form national multi-scale and multi-topic land use raster products,which can provide support for the future land use raster products production and sharing application.