多源数据融合下的森林防火本底数据库建立

Data fusion with 3D modeling for forest fire prevention background database

对森林防火三维本底数据库组成及特点进行分析,在空间信息技术、数据融合技术和三维建模技术等的支持下,提出基于MapX和OpenGL为研究工具的森林防火三维本底数据库建立方法。该方法以OpenGL为技术基础,利用数字高程模型高程数据和OpenGL的纹理映射机制在三维地形上融合遥感数据,实现各种信息的三维真实显示。以Mapinfo所建立的属性数据为基础,通过坐标转换,实现二维矢量地图同三维地形的任意点、面的联动。在此基础上利用MapX组件从二维地图上获取乡镇边界、乡村边界和小班边界等森林资源数据,并同三维地形有机融合,实现森林资源数据的三维显示。最后融合防火资源数据和全球定位系统(GPS)数据,实现了防火队和防火物资等数据的融合与操作。

This research was designed to build a three dimensional （3D） background database for forest fire prevention. A new method using MapX （a coordinate transformation library） and OPEN Graphics Language （OpenGL） along with spatial information, data fusion, and 3D modeling technologies was developed to analyze features of a 3D background database. Digital Elevation Model （DEM） altitude data and OpenGL texture mapping were integrated with remote sensing data in a 3D terrain to portray an actual vision of the terrain. Mapinfo （a PC-based mapping software） provided attribute data, and coordinate transformation was achieved by linking surface points of the MapX two-dimensional map fused with the three dimensional terrain. The result was a forest resource database with village, town, and sub-compartment boundaries, that showed organic forest resource data in a 3D display. Integrated with GPS data, this forest fire prevention data realize fire prevention to detect combustible material buildups and fire controll.