Method for actually measuring and evaluating large region ground surface coverage precision by using high-precision instrument

The invention discloses a method for actually measuring and evaluating large region ground surface coverage precision by using a high-precision instrument. The method comprises the following steps: assigning workload for ground surface coverage data to be evaluated, image data corresponding to ground surface coverage, space range data capable of effectively and hierarchically classifying the region and sampled sample comprehensive data of an adopted precision evaluation sampling scheme according to the number of pattern spots and an operation range, and meanwhile hierarchically dividing the integral evaluation region into each independent unit; performing field actual measurement and precision evaluation by using the high-precision instrument and then summarizing precision evaluation result of each unit to finally form an integral precision evaluation result. By considering the characteristics of qualitative and quantitative precision evaluation, the precision of a region ground surface coverage product is more completely reflected and evaluated; the workload can be hierarchically and clearly cut to facilitate management, so the field work is relieved, and the development of the actual measurement precision evaluation work in a larger range is facilitated.