在ArcGIS属性表中增加需要的字段，并自动赋值

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

坐标值为On the Fly显示的坐标,不是文件存储的固有坐标

10–连续编号
VBA部分:
Static lCount as long
lCount=lCount+1
赋值部分:
lCount (从1开始)
lCount-1 (从0开始)