简介：Accordingtothetopographyofmountains,thediscretedatapointsfrommapofthewholeregionarefirstsubdividedintosubregionswiththepointstakenfromthefeaturelinesofridge,valleyandscarpbeinginsertedintothemappointset,andusingthefeaturelinesastheboundariesofsubregionstobuildconstrainedDelaunayTIN.Suchanapproachhastheadvantagesofensuringhighaccuracyandfastspeedoflinelayout.
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