[转]
在ARCGIS属性表中，一般不会包含实体几何信息，可以采取VBA进行计算。
下面是几个简单的代码（转载自集思学院）
特点:
1推荐给不会使用AO的朋友
2可以保存为CAL文件以备下次方便使用
使用方法
1打开属性表,选择计算的字段,右点选择Calculate Values；
2.选择“是”，进入Field Calculator；
2选择Advance选项；
3 在Pre-Logic VBA Script Code编辑框中输入VBA代码；
4在下面编辑框中输入赋值部分.
1--点坐标X
VBA部分:
Dim pGeo As IGeometry
Set pGeo = [Shape]
Dim pPoint As IPoint
Set pPoint = pGeo
赋值部分:
pPoint.X
2--点坐标Y
VBA部分:
同上
赋值部分:
pPoint.Y
坐标值为文件存储的固有值,和是否使用On the Fly坐标表示无关。返回当前显示的坐标值参看8,9
3--多边形周长
VBA部分:
Dim pGeo As IGeometry
Set pGeo = [Shape]
Dim pPolygon As IPolygon
Set pPolygon = pGeo
赋值部分:
pPolygon.Length
4--多边形面积
VBA部分:
Dim pGeo As IGeometry
Set pGeo = [Shape]
Dim pPolygon As IPolygon
Set pPolygon = pGeo
Dim pArea As IArea
Set pArea = pPolygon
赋值部分:
pArea.Area
5--多边形重心X
VBA部分:
Dim pGeo As IGeometry
Set pGeo = [Shape]
Dim pPolygon As IPolygon
Set pPolygon = pGeo
Dim pArea As IArea
Set pArea = pPolygon
Dim pPoint As IPoint
Set pPoint = pArea.Centroid
赋值部分:
pPoint.X
6--多边形重心Y
VBA部分:
同上
赋值部分:
pPoint.Y
7--Polyline长度
VBA部分:
Dim pGeo As IGeometry
Set pGeo = [Shape]
Dim pPolyline As IPolyline
Set pPolyline = pGeo
Dim pCurve As IPolycurve
Set pCurve = pPolyline
赋值部分:
pCurve.Length
8--表示点坐标X
VBA部分:
Dim pDoc As IMxDocument
Set pDoc = ThisDocument
Dim pSpRef As ISpatialReference
Set pSpRef = pDoc.FocusMap.SpatialReference
Dim pClone As IClone
Set pClone = [Shape]
Dim pGeo As IGeometry
Set pGeo = pClone.Clone
Dim pPoint as IPoint
Set pPoint = pGeo
pGeo.Project pSpRef
赋值部分:
pPoint.X
9--表示点坐标Y
VBA部分:
同上
赋值部分:
pPoint.Y
