I need to calculate the distances of 4500 housing units to a Park.
I have found this post http://forums.esri.com/Thread.asp?c=93&f=982&t=86666 (that is now closed) and I could edit the table of attribute of my shape file, adidng a new field and using the field calculator with this code suggested by Olivier
In the shapefile, use the field calculator and paste the following pre-logic VBScript code (advanced) -In the code, change the X and Y constants to the coordinates of the park -Type 'Distance' in the 'FieldYouCalculate =' text box.
Const X As Double = 100000 Const Y As Double = 50000 Dim Distance As Double Dim pPoint As IPoint Set pPoint = New esriGeometry.Point pPoint.PutCoords X, Y Dim pProxOp As IProximityOperator Set pProxOp = pPoint Distance = pProxOp.ReturnDistance([Shape])
This procedure create the Field DIST2PARK (this is the way I named the new field) in circa 30 seconds.
The only issue is that the distances calculated are not correct because I get a large number. I have tried as Constant parks X and Y's coordinates both in decimal degrees and meters. What is funny is that If I select the point related to the park and I check the correspondent cell in DIST2PARK this should be zero instead it has a large number.
Any idea and suggestion would be greatly appreciated. I am newbie to GIS.
