In addition, there in code within -mif2dta- that calculates centroids
that could be adapted.
Scott
----- Original Message -----
From: n j cox <[email protected]>
Date: Thursday, February 2, 2006 10:09 am
Subject: Re: st: RE: tmap label coordinates
> This is one definition of the centroid, not an approximation.
>
> For some shapes, the centroid might lie outside the area,
> as is true of many a banana state. This can also be true
> economically.
>
> Nick
> [email protected]
>
> Hoetker, Glenn
>
> I encountered this a while ago and can't swear that I'm remembering
> correctly. However, I believe I found that the (approximate, at
> least)centroid for a region corresponded to the average value of
> the x_coord
> for that region and the average value of the y_coord for that state.
>
> I hope that's helpful and apologize if I've misremembered and sent
you
> down a blind alley.
>
> Friedrich Huebler
>
> > With the -tmap- package from SSC it is possible to create maps in
> > Stata. The help file and user's guide show how labels can be
> added to
> > a map, with the example of a map of the United States. To add
> labels > it is necessary to specify the x and y coordinates where
> the labels
> > should be placed. The example database us-database.dta contains the
> > variables x_coord and y_coord that identify the center of each
> state. > Assume that these variables are not present in a
> database. How could
> > I identify the center of each region where I want the labels to be
> > placed?
>
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