30 m地表覆盖栅格数据的更新方法研究

Research on Updating Method of 30 m Surface Coverage Raster Data

基于对更新期影像的目视发现变化、栅格转矢量和面向对象的尺度分割技术,完成了30 m地表覆盖栅格产品的更新工作,并通过建立栅格转矢量的地表更新方法,实现了在更新工作中目视发现变化准确性的提高和影像解译工作量的降低。通过实验总结,针对不同更新区域的地物分布情况,应考量不同更新方法的适应性,通过采用适宜的更新作业方式,能够极大地提升工作效率,也能很好地控制产品质量。

Based on the visual detection of changes in images during the updating period,conversion from grid to vector,and objectoriented scale segmentation technology,the update of a 30 meter surface coverage raster product was completed.By establishing a conversion from grid to vector surface updating method,the accuracy of visual detection of changes was improved and the workload of image interpretation was reduced in the updating work.Through experimental summary,it is necessary to consider the adaptability of different updating methods based on the distribution of land features in different updating areas.By adopting appropriate updating operation methods,work efficiency can be greatly improved and product quality can be well controlled.