The Christy,
Try typing this into the mapbasic window:
update mytable set object = Buffer(object,20,25,"mi")
{where mytable is of course the name of your table}
Buffer syntax is:
Buffer ( inputobject, resolution, width, unit_name )
inputobject is an object expression
resolution is a SmallInt value representing the number of nodes per
circle at each corner
width is a Float value representing the radius of the buffer; if
width is negative, and if inputobject is a closed object, the object
returned represents an object smaller than the original object
unit_name is the name of the distance unit (e.g. "mi" for miles,
"km" for kilometers) used by width
As your features are points you can also use circles rather than buffers, in
which case you would enter:
set distance units "mi"
update mytable set object =
createcircle(centroidx(obj),centroidy(obj),25)
Cheers
Martin
==================================
Martin Roundill
GIS Manager
Waitakere City Council
Private Bag 93109
Henderson
Waitakere City
New Zealand
-----Original Message-----
From: Christy Noonan [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, 15 February 2000 12:45
To: MapInfo-L (E-mail)
Subject: MI Buffer, ID help
Hi,
I have a list of points that have a 4digit identification code. I create
25 mile buffers around each of the points. I want to be able to create a
table displaying the points identification code and also the buffer that
corresponds to each point.
Currently when I create the buffers the buffer ID's in the table are all 0.
I want to know which buffer goes with each point.
Any help appreciated. Thanks in advance, Cn
Christy Noonan
R&D at ERAC
[EMAIL PROTECTED]
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