Centroid point layer from polygons

[Billy Charlton]

Hi all, could anyone give me some advice on this:

 

 I want to create a point.tab from the centroids for a polygon.tab

 

 thanks in advance

 

Kind regards, Billy

 

Billy Charlton

GIS Officer

 

Selwyn District Council

PO Box 90

Rolleston 7643

Main SDC #      (03) 347 2800

DDI                  (03) 347 2819
Fax #               (03) 347 2799

www.selwyn.govt.nz

 

[David Reid]

If you want points for "all" the polygons, simply save a copy of your polygon table to a new table and open it back up...

 

Ex. save "mypolys.tab" as "mypoints.tab", open "mypoints.tab", make "mypoints" editable and in the Mapbasic window, enter the following:

 

Update mypoints Set OBJ = Centroid(OBJ)

 

This will "convert" your polygons to point objects based on the original centroid while maintaining the data behind the objects.

 

 

HTH

David Reid

Colbert County 9-1-1

Colbert County, Alabama

 

---

From: mapi...@googlegroups.com [mailto:mapi...@googlegroups.com] On Behalf Of Billy Charlton
Sent: Monday, March 10, 2008 7:31 PM
To: mapi...@googlegroups.com
Subject: [MI-L] Centroid point layer from polygons

[Billy Charlton]

Thank you very much David, that is exactly what I wanted

 

Kind regards, Billy

 

Billy Charlton

GIS Officer

 

Selwyn District Council

PO Box 90

Rolleston 7643

Main SDC #      (03) 347 2800

DDI                  (03) 347 2819
Fax #               (03) 347 2799

www.selwyn.govt.nz

 

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