The Research on Relationships between Subdivision of Tidal Land Topographic Map and Projection: A Case Study of Investigation on Tidal Land Resources in Zhejiang Province

Abstract

The topographic map of tidal land which is the initial form of survey results of “Investigation on Tidal Land Resources in Zhejiang Province†will involve splicing of adjacent zone during formation, and there will be phenomenon of edge overlapped or separated which is thought to be related to error of survey or graphics. In this paper, the authors try to explain the actual result of zonal projection and map subdivision through explaining about analysis on projection and its distortion, the research on map subdivision and numbering, and the research on subdivision of tidal land topographic map. In addition, when you find the regularity of subdivision, you can estimate the distortion error of certain area of coastal tidal land in the map by its graph outline coordinate data.