shrug-l: polygon to point
Tue, 28 Dec 2004 08:31:42 -0500
The "outside" centroid is avoided if you use trusty ArcInfo.
GIS Project Manager
Tallahassee-Leon County GIS
Leon County Courthouse
301 S Monroe St, Room P313-F
Tallahassee, FL 32301
>>> Alan Foley <AFoley@jea.net> 12/27/2004 5:54:01 PM >>>
Other users have already provided good methods to use. I don't know if
will be a concern for you, but watch out for irregularly shaped
such as flag lots - the centroid may actually fall outside the polygon
[mailto:email@example.com] On Behalf Of Dietrich,
Sent: Thursday, December 23, 2004 10:36 AM
Subject: RE: shrug-l: polygon to point
>From ArcMap help these steps allow you to add the x and y of the
a polygon layer that can then be brought in as an event theme and saved
shape file or other type of layer.
Start an edit session in ArcMap. Calculating a field is faster outside
edit session, but you won't be able to undo the calculation.
Open the attribute table of the layer of the layer you want to edit.
Right-click the field heading for the X field (if there is no X field
add a new field by clicking the options button and selecting the new
Click Calculate Values.
Type the following VBA statement in the first text box.
Dim dblX As Double
Dim pArea As IArea
Set pArea = [Shape]
dblX = pArea.Centroid.X
Type the variable dblX in the text box directly under the X field name.
You can repeat the same process for updating a field with the Y
for the centroid point of each polygon in the layer.
Division of Water Resource Management
Florida Department of Environmental Protection
[mailto:firstname.lastname@example.org] On Behalf Of Lingaraj
Sent: Thursday, December 23, 2004 3:53 AM
Subject: shrug-l: polygon to point
Three is three way of converting poly to point features
1. Arc GIS 9.x
Arc Tool Box----Data Mangement Tool----Features----Feature to point
2. Arc Info (workstation)
if you have a polygon coverage then go to tools of Edit tools and
conversion tools----Topology-------Create labels Now open it in Arc
when u will single click on the coverage on the ADD window, it will
three sub-heads under the main coverage head. Add the data and assign
from the raw orginal poly coverage using Geoprocessing Wizard and then
convert it to .shp file for further use.
3. Arc Info
If u have a region instead of poly then go to edit----change edit
to label and clean & Build as LABEL, and then follow the same procedure
Arc View as mentioned in No. 2
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