[第五章空间数据的可视化表达.ppt

将要素属性数值按照一定的分级方法分成若干级别之后，用不同的颜色来表示不同级别。每个级别用来表示数值的一个范围，从而可以明确反映制图要素的定量差异。 1.3、分级色彩 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 查看分类方法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 分级属性中默认要素的分级方案是Natual Breaks，它是在分级数确定的情况下，通过聚类分析将相似性最大的数据分在同一级，差异性大的分在不同级，这种方法可以保持较好数据的统计特性，但分级界限往往是任意数，不符合常规制图需要。 * Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 选择分类方法为手动； 在中断值中依次输入数值50,100,200,400,700,1500,9500 查看符号化后的地图。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 美国各州人口密度分布图 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1.4、分级符号 类似于分级色彩设置方法，设置分级符号是将要素属性数值按照一定的分级方法分成若干级别，然后用不同的符号表示不同的级别。 符号的形状往往是根据制图要素的特征来确定的，而符号的大小取决于分级数值的大小或是级别的高低。分级符号表示方法一般用于表示点状和线状要素，诸如城镇人口分级图、商业销售分级图以及道路等级图分布图等。 优点是可以直观地表达制图要素的数值差异。 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 查看分类方法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 调整相关参数 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * * 自然间隔分类 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * * 等间隔分类渲染 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * * 分位数分类渲染 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. * * 标准差分类渲染 Evaluation only. Created with Aspose.Slides for .NET 3.5 Clie