METHOD AND SYSTEM FOR VECTOR-RASTER OVERLAY ANALYSIS OF GROUND SURFACE IMAGE AREA BASED ON EDGE CLIPPING

摘要

A method and a system for vector-raster overlay analysis of a ground surface image area based on edge clipping are provided. A large amount of computing resources is required during the calculation of extracting a ground surface image area using the vector-raster overlay analysis and a loss of accuracy is resulted when vector data is converted into raster data, thereby leading to the issue of calculation error of a polygon surface area. The disclosure adopts the vector-raster overlay analysis method while cropping an edge vector polygon of the ground surface image to be measured and allocating an attribute value of the image according to a pixel, so as to accurately calculate the ground surface image area without drastically increasing the amount of calculation, thereby achieving the function of improving the accuracy and efficiency of calculating the ground surface image area.