METHOD FOR PROVIDING SURFACE ROUGHNESS IN GEOGRAPHIC INFORMATION SYSTEM

摘要

The present invention relates to a land classification of the target area, vegetation classification, construction and arrangement conditions when surface roughness map providing method capable of providing a surface roughness map and accurately estimate the roughness which changes according to their facilities, land cover map, green natural maps, digital map data beyiseuhwa and covered Classifieds ground roughness, comprising the ground roughness, by measuring the roughness of the ground digital elevation for buildings and facilities data entry beyiseuhwa according to the vegetation classification; The step of selecting a target area; When the roughness of setting a lattice spacing distinguish the target area corresponding to the accuracy of the map; Also land cover maps, the natural greenery of the selected target area, imported a digital map, comprising, separated by the set grid spacing; When the step of calculating the roughness from the established data base, separated numerical elevation of the covering of vegetation classification or classification or building and facility entry for each grid area; And, a step of collecting a surface roughness surface roughness created output a map of the all grid area.