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[求助]在arcgis的邻域分析中的分析函数即statistic type 能不能自定义？
<P >请问各位高手：在<FONT face="Times New Roman">arcgis</FONT>的邻域分析中的分析函数即<FONT face="Times New Roman">statistic type </FONT>能不能自定义？</P>
<P >现有一栅格<FONT face="Times New Roman">grid</FONT>文件，确定<FONT face="Times New Roman">3x3</FONT>的分析窗口</P> <TABLE cellSpacing=0 cellPadding=0 border=1> <TR> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">a</FONT></P></TD> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">b</FONT></P></TD> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">c</FONT></P></TD></TR> <TR> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">d</FONT></P></TD> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">e</FONT></P></TD> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">f</FONT></P></TD></TR> <TR> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">g</FONT></P></TD> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">h</FONT></P></TD> <TD vAlign=top width=24> <P ><FONT face="Times New Roman">i</FONT></P></TD></TR></TABLE> <P >高程分析窗口（<FONT face="Times New Roman">a,b,c,d,e,f,g,h,i</FONT>分别代表各栅格元的高程值）</P> <P ><FONT face="Times New Roman"> <p></p></FONT></P> <P >如何计算下面两个式子：</P> <P ><FONT face="Times New Roman">x</FONT>方向高程变化率<FONT face="Times New Roman">p=</FONT><v:shapetype><FONT face="Times New Roman"> э <v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path connecttype="rect" gradientshapeok="t" extrusionok="f"></v:path><lock aspectratio="t" v:ext="edit"></lock></FONT></v:shapetype><FONT face="Times New Roman">H / э</FONT><FONT face="Times New Roman">x =[(a+2d+g)-(c+2f+i)]/8cellsize</FONT></P> <P ><FONT face="Times New Roman">y</FONT>方向高程变化率<FONT face="Times New Roman">q= э</FONT><FONT face="Times New Roman">H / э</FONT><FONT face="Times New Roman">y =[(a+2b+c)-(g+2h+i)]/8cellsize</FONT></P> <P ><FONT face="Times New Roman">cellsize</FONT>为栅格格网间距</P> <P >请高手们不吝赐教，谢谢！</P> |
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