How to calculate Automatically Distances to one fixed point

ErmannoAffuso — Tue, 28 Feb 2012 14:41:04 GMT

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.

Thanks

Re: How to calculate Automatically Distances to one fixed point

JoeBorgione — Tue, 28 Feb 2012 15:03:12 GMT

Can the near command work for your?

topic How to calculate Automatically Distances to one fixed point in Data Management Questions

How to calculate Automatically Distances to one fixed point

Re: How to calculate Automatically Distances to one fixed point