栅格地图数据的现势性检查

The Currency Check of Raster Graphic Data

鉴于全自动的栅格地图数据现势性检查受到自动特征提取技术的可靠性和准确性不高以及提取速度较慢等因素的限制,使得不能满足生产作业的需求。采用像素数的变化比率的方法来实现半自动栅格地图数据的现势性检查。实验证明该方法是可行的。

For the limit of the effect of the automatic feature extraction which is in low reliability, accuracy and velocity, the automatic currency check of raster graphic data can not satisfy the requirement of production and operation. So, this article uses the change ratio of the pixel number to realize the automatic currency check of raster graphic data. The experiment shows this method is feasible.