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Research on the Lettering Configuration and Expression in Virtual Geographic Environment

Author: WangLiJun
Tutor: YouXiong
School: PLA Information Engineering University
Course: Cartography and Geographic Information Engineering
Keywords: Virtual Geographic Environments Note Note Configuration Note Representation Pyramid Model LOD technology
CLC: P283
Type: Master's thesis
Year: 2010
Downloads: 49
Quote: 1
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Abstract


The annotation is an important part of an integral part of the map , annotation problem has not been more attention in the virtual geographical environment . Note the virtual geographic environment the annotation expression of the three-dimensional environment , compared to the two-dimensional environment , annotation expression is more complex , two-dimensional map representation and annotation configuration rules have a lot of the content can not be applied . Access to relevant information , combined with the characteristics of virtual geographic environment annotation placement and representation issues . Mainly from three perspectives discussed the annotation expression in the virtual geographical environment : to said display styles and how to achieve what position . 1. Analysis of the map annotation at home and abroad of the status quo , to explore the concepts and features of the virtual geographical environment , summarizes the annotation design virtual geographic environment influencing factors , from the map semiotics , maps feelings theory , Map aesthetic theory analysis virtual Geographic Environments annotation design basis of the theory . Summarized by the application of the basic theory of the Virtual Geographic Environments annotation design principles , and follow the the annotation design principles Virtual Geographic Environments annotation design , design visual annotation variable virtual geographic environment , describes the style of each - Note , and analysis of the the annotation various advantages and disadvantages of the method to build a virtual geographic environment design table annotation . Study Virtual Geographic Environments annotation configuration key issues , the annotation placement principle , describe the annotation configuration rules from the point , line, surface three and annotation visibility judge , annotation gland judgment related issues were discussed . Details the pyramid model and LOD technology , the proposed multi-resolution LOD technology build the annotation pyramid model , design annotation pyramid model stratified blocking scheme . Describe the annotation data structures designed virtual geographic environment and explore new annotation format virtual geographic environment .

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > Cartography ( Cartology ) > Map compilation
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