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<div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6274344c8dbc4529de4a2cf7/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">第<span class="_ _0"> </span><span class="ff2">12<span class="_ _0"> </span></span><span class="sc1">章 数据输出算法</span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
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<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6274344c8dbc4529de4a2cf7/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x2 h4 y3 ff1 fs1 fc0 sc0 ls0 ws0">主要内容</div><div class="t m0 x2 h5 y4 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x3 h6 y5 ff4 fs3 fc2 sc0 ls0 ws0"> GIS<span class="_ _1"> </span><span class="ff1">数据输出概述</span></div><div class="t m0 x2 h5 y6 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x3 h6 y7 ff4 fs3 fc2 sc0 ls0 ws0"> GIS<span class="_ _1"> </span><span class="ff1">中图形的输出</span></div><div class="t m0 x2 h5 y8 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x3 h7 y9 ff1 fs3 fc2 sc0 ls0 ws0"> <span class="_ _2"> </span>地图的表示和地图符号</div><div class="t m0 x2 h5 ya ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x3 h7 yb ff1 fs3 fc2 sc0 ls0 ws0"> <span class="_ _1"> </span>符号生成算法与符号库应用</div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6274344c8dbc4529de4a2cf7/bg3.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x4 h8 yc ff1 fs4 fc3 sc2 ls0 ws0">一、<span class="_ _3"> </span><span class="ff2 sc0">GIS<span class="_ _3"> </span></span>数据输出<span class="_ _4"></span>概述</div><div class="t m0 x5 h5 yd ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x6 h7 ye ff1 fs3 fc2 sc0 ls0 ws0">可视化是指利用<span class="fc4">计算机图形图象技术</span>，将复杂的科学现</div><div class="t m0 x6 h7 yf ff1 fs3 fc2 sc0 ls0 ws0">象，自然景观及一些抽象的概念图形化的过程。</div><div class="t m0 x5 h5 y10 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x6 h7 y11 ff1 fs3 fc2 sc0 ls0 ws0">可视化目的是便于人们理解现象，发现规律和传播知识。</div><div class="t m0 x5 h5 y12 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x6 h7 y13 ff1 fs3 fc2 sc0 ls0 ws0">地理可视化是将<span class="fc4">符号或数据</span>转化为直观的<span class="fc4">图形、图像</span>的</div><div class="t m0 x6 h7 y14 ff1 fs3 fc2 sc0 ls0 ws0">技术，它的过程是一种<span class="fc4">转换</span>，它的目的是将原始数据转</div><div class="t m0 x6 h7 y15 ff1 fs3 fc2 sc0 ls0 ws0">化为可显示的图形、图像，从而全面且本质地把握住地</div><div class="t m0 x6 h7 y16 ff1 fs3 fc2 sc0 ls0 ws0">理空间信息的基本特征，便于最迅速、形象地传递和接</div><div class="t m0 x6 h7 y17 ff1 fs3 fc2 sc0 ls0 ws0">收它们。</div><div class="t m0 x7 h9 y18 ff1 fs5 fc4 sc0 ls0 ws0"> <span class="_ _5"> </span>可视化（<span class="_ _5"> </span><span class="ff5">Visua<span class="_ _6"></span>lization)<span class="_ _3"> </span></span>概述</div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6274344c8dbc4529de4a2cf7/bg4.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x8 ha y19 ff6 fs5 fc5 sc0 ls0 ws0">1<span class="_ _7"> </span>、科学计算可视化</div><div class="t m0 x8 hb y1a ff3 fs6 fc1 sc0 ls0 ws0"></div><div class="t m0 x9 h7 y1b ff1 fs7 fc2 sc0 ls0 ws0">可<span class="fs3">视化的概念首先由美国国家自然科学基金会员会图形</span></div><div class="t m0 x9 h6 y1c ff1 fs3 fc2 sc0 ls0 ws0">图象专题组在<span class="_ _1"> </span><span class="ff4">1987<span class="_ _8"> </span></span>年提出了科学计算可视化</div><div class="t m0 x9 h6 y1d ff1 fs3 fc2 sc0 ls0 ws0">（<span class="_ _8"> </span><span class="ff4">Vi<span class="_ _6"></span>sualization in<span class="_ _6"></span> Scientic Com<span class="_ _6"></span>puting)<span class="_ _2"> </span></span>。</div><div class="t m0 x8 h5 y1e ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x9 h7 y1f ff1 fs3 fc2 sc0 ls0 ws0"> <span class="_ _1"> </span>科学计算可视化是研究如何将科学计算过程及计算结</div><div class="t m0 x9 h7 y20 ff1 fs3 fc2 sc0 ls0 ws0">果所产生的数据转换成图形或图像信息，并可进行交互</div><div class="t m0 x9 h7 y21 ff1 fs3 fc2 sc0 ls0 ws0">式分析。</div><div class="t m0 x8 h5 y22 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x9 h6 y23 ff1 fs3 fc2 sc0 ls0 ws0"> <span class="ff4">1997<span class="_ _8"> </span></span>年国际地图学会成立了可视化委员会，提出将科</div><div class="t m0 x9 h7 y24 ff1 fs3 fc2 sc0 ls0 ws0">学计算可视化和地图可视化的连接和交流。</div><div class="t m0 x8 h5 y25 ff3 fs2 fc1 sc0 ls0 ws0"></div><div class="t m0 x9 h7 y26 ff1 fs3 fc5 sc0 ls0 ws0">科学计算可视化<span class="fc6">指运用<span class="fc4">计算机图形学和图像处理技术</span>，</span></div><div class="t m0 x9 h7 y27 ff1 fs3 fc6 sc0 ls0 ws0">将科学计算过程中产生的<span class="fc4">数据及计算结果</span>转换为<span class="fc4">图形和</span></div><div class="t m0 x9 h7 y28 ff1 fs3 fc4 sc0 ls0 ws0">图像<span class="fc6">显示出来，并进行</span>交互处理<span class="fc6">的</span>理论、方法和技术<span class="fc6">。</span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
<div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6274344c8dbc4529de4a2cf7/bg5.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xa ha y29 ff6 fs5 fc5 sc0 ls0 ws0">2<span class="_ _7"> </span>、空间信息可视化</div><div class="t m0 xa h7 y2a ff1 fs3 fc2 sc0 ls0 ws0"> <span class="_ _1"> </span>可视化能迅速、形象地表示空间信息，<span class="fc5">空间信息离不开</span></div><div class="t m0 xa h7 y2b ff1 fs3 fc2 sc0 ls0 ws0">可视化。</div><div class="t m0 xa h7 y2c ff1 fs3 fc2 sc0 ls0 ws0"> <span class="_ _1"> </span>因此，科学计算可视化之后，地学专家对可视化<span class="_ _4"></span>在地学</div><div class="t m0 xa h7 y2d ff1 fs3 fc2 sc0 ls0 ws0">中的地位和作用进行了许多研究，提出了地图可视化、地</div><div class="t m0 xa h6 y2e ff1 fs3 fc2 sc0 ls0 ws0">理可视化、<span class="_ _8"> </span><span class="ff4">GIS<span class="_ _1"> </span></span>可视化、地学多维图解、地理信息的多维</div><div class="t m0 xa h7 y2f ff1 fs3 fc2 sc0 ls0 ws0">可视化、虚拟地理环境等概念。</div><div class="t m0 xa hc y30 ff1 fs8 fc5 sc0 ls0 ws0"><span class="fc7 sc0"> </span><span class="fc7 sc0"> </span><span class="fc7 sc0"> </span></div></div></div><div class="pi" data-data='{"ctm":[1.333333,0.000000,0.000000,1.333333,0.000000,0.000000]}'></div></div>
