[求助]哪位高手有关于DEM切割方面的资料

哪位高手有关于DEM切割方面的资料，给小弟传一份，急用，谢谢，qq：25300912，<a href="mailtrockymacn@163.com" target="_blank" >rockymacn@163.com</A>

<P>什么问题？没有资料，不过我也切过</P><P>哈哈</P>

<P>本人做论文需要资料，谁有给发一份啊，或者什么书里面有，告诉一声，谢谢！</P>

<P>我用以下方法切过，好使！</P><P>*******************************************************</P><P>ESRIcanda上有个文章用shape文件切割raster，原文如下：
Yes, you can clip a raster with either a new shapefile or an existing shapefile. You will require the Spatial Analyst extension to perform this procedure.</P><P>Follow the steps below to clip a raster using a new shapefile:</P><P>
First, create the shapefile that will provide the new extent of the raster:
1. Start ArcCatalog.
2. Right-click the folder where you want to create the shapefile and select New Shapefile.
3. Name your shapefile and specify:
Feature Type = Polygon
Spatial Reference (is optional)
4. Start ArcMap.
5. Add the new shapefile layer and raster layer.
6. Click Editor > Start Editing and specify:
Task = Create New Feature
Target = Shapefile
7. Select the Create New Feature tool.
8. Draw a polygon around the area of the raster you want to clip. 9. Stop editing and save your edits. </P><P>Now clip your raster based on the shapefile:</P><P>1. From the Spatial Analyst dropdown menu select Options from the General tab and specify Analysis Mask = Shapefile.
2. Click on the Extent tab and specify Analysis Extent = Shapefile.
3. From the Spatial Analyst dropdown menu select Raster Calculator.
4. Double-click your raster listed under Layers so it appears in the expression box.
5. Click on the Evaluate button. </P><P>A new raster will appear in the table of contents with the same extent as the shapefile. You may need to turn off the other layers to see the new raster.</P><P>You can also do this procedure with an existing shapefile. Instead of going through the above steps to create a new shapefile, simply use the existing shapefile in the "Now clip your raster based on the shapefile" steps.
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<P>非常感谢！</P>

到ESRI网站上去下控件，我下过好用的 很

到ESRI网站上去下控件，我下过好用的 很

<P>3xs</P>