学步园

在用ArcMap制图时，某些标注过长，地图显示上不太好看，而Maplex扩展可以将标注分行显示，但是首先要将标注字符串用符号分隔。下面的代码是用Python根据一定的规则分隔字符串。这个规则最好的情况下是要有个语义字典库，这样才能保证字符串分割比较符合语言习惯。

#coding=gbk<br /> import sys, string, os, arcgisscripting<br /> gp = arcgisscripting.create()<br /> def subString(str, fromindex, toindex):<br /> return str.decode('gbk')[fromindex:toindex].encode('gbk')<br /> #pfeatureclass = "D://Data//ChinaAdmin//entern.shp"<br /> #srcfield = "shanghai_4"<br /> #destfield = "Form_Name"<br /> pfeatureclass = gp.getparameterastext(0)<br /> srcfield = gp.getparameterastext(1)<br /> destfield = gp.getparameterastext(2)<br /> featurecur = gp.updatecursor(pfeatureclass, "")<br /> featurerow = featurecur.next()<br /> while featurerow:<br /> name_cn = featurerow.getvalue(srcfield)<br /> #print name_cn<br /> unicodenamelen = len(name_cn.decode('gbk'))<br /> asciinamelen = len(name_cn)<br /> #如果字符串中含有非中文，不处理<br /> if unicodenamelen * 2 != asciinamelen:<br /> result = name_cn<br /> else:<br /> if unicodenamelen == 6:<br /> result = subString(name_cn, 0, 3) + "|" + subString(name_cn, 3, 6)<br /> elif unicodenamelen == 7:<br /> result = subString(name_cn, 0, 4) + "|" + subString(name_cn, 4, 7)<br /> elif unicodenamelen == 8:<br /> result = subString(name_cn, 0, 4) + "|" + subString(name_cn, 4, 8)<br /> elif unicodenamelen == 9:<br /> result = subString(name_cn, 0, 5) + "|" + subString(name_cn, 5, 9)<br /> elif unicodenamelen == 10:<br /> result = subString(name_cn, 0, 5) + "|" + subString(name_cn, 5, 10)<br /> elif unicodenamelen == 11:<br /> result = subString(name_cn, 0, 6) + "|" + subString(name_cn, 6, 11)<br /> elif unicodenamelen == 12:<br /> result = subString(name_cn, 0, 6) + "|" + subString(name_cn, 6, 12)<br /> elif unicodenamelen == 13:<br /> result = subString(name_cn, 0, 5) + "|" + subString(name_cn, 5, 10) + "|" + subString(name_cn, 10, 13)<br /> elif unicodenamelen == 14:<br /> result = subString(name_cn, 0, 5) + "|" + subString(name_cn, 5, 10) + "|" + subString(name_cn, 10, 14)<br /> elif unicodenamelen == 15:<br /> result = subString(name_cn, 0, 5) + "|" + subString(name_cn, 5, 10) + "|" + subString(name_cn, 10, 15)<br /> elif unicodenamelen == 16:<br /> result = subString(name_cn, 0, 6) + "|" + subString(name_cn, 6, 11) + "|" + subString(name_cn, 11, 16)<br /> elif unicodenamelen == 17:<br /> result = subString(name_cn, 0, 6) + "|" + subString(name_cn, 6, 12) + "|" + subString(name_cn, 12, 17)<br /> elif unicodenamelen == 18:<br /> result = subString(name_cn, 0, 6) + "|" + subString(name_cn, 6, 12) + "|" + subString(name_cn, 12, 18)<br /> else:<br /> result = name_cn<br /> featurerow.setvalue(destfield, result)<br /> featurecur.Updaterow(featurerow)<br /> gp.addwarning("Update feature row value " + result + " succeeded")<br /> featurerow = featurecur.next();<br /> del featurecur<br /> del featurerow