Consistency Detecting and Measuring of Raster Map Annotations

Consistency is an important criterion of spatial data quality. Checking the inconsistencies is critical for maintaining the integrity of multi-resolution or multi-source spatial data. Annotation is an important element of the map, which contain abundant geographical location information. Multi-resolution spatial data always contain the inconsistencies of annotations due to measurement methods, data acquisition approaches, and map generalization algorithms. In this paper, we try to use a new kind of raster data which named map tile to detect the consistency information of multi-scale annotations. On the basis of existing space target change type, we put forward 12 types of basic changes, quantify the annotation consistency between the different of map, and put forward the methods of consistency detection for raster map annotation. We use the methods to detect and measure the consistency of annotations in web raster map, it is proved that the methods are reasonable and effective.