The feature mentioned here was added in MapInfo 7.0. If you are using a
version of MapInfo prior to this (but then who does ? ;-)), you'll have to
do it this way around in stead:
- Make a copy of your table
- Open the copy, let's assume it's called MYCOPY
- Now open the MapBasic window.
- Enter the following text and hit the ENTER button afterwards:
Update MYCOPY Set Obj = Buffer(OBJ, 12, 0.5, "mi")
- Now you have changed all your points into regions created using the buffer
function. And now you are ready to perform your SQL query.
Another way would be to create the buffers virtually in the SQL query like
this:
Select * From REGIONS
Where OBJ Intersects Any (Select Buffer(OBJ, 12, 0.5, "mi") From
POINTS)
Using this methode will not actually convert the points to region but only
create virtual buffers for the SQL query.
HTH,
Peter Horsb�ll M�ller
GIS Developer
COWI A/S
Rug�rdsvej 55
DK 5000 Odense C
Tel +45 6313 5013
Direct +45 6313 5008
Mobil +45 2270 4308
Fax +45 6313 5090
Kampsax blev i juni 2002 overtaget af COWI. I forbindelse med den
igangv�rende integrationsprocess udskiftes vores Kampsax e-mail adresser med
COWI e-mail adresser.Hjemmesideadresser forbliver u�ndrede
> -----Original Message-----
> From: Raghavendran [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, December 17, 2002 9:49 PM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: Re: MI-L Buffering Problem
>
>
> Ron,
>
> When you buffer a point object or any other object for that
> matter and
> select the option to have one buffer for all objects.. MI Pro
> allows you to
> either have no data for the buffer or have a constant value
> assigned for
> various columns in your TAB file or calculate the average/sum of the
> values..
>
> This can be done under the Data Aggregation step.
>
> If you choose buffer for each object then you can transfer
> the value of the
> point data from which the buffer originated to the corres. buffer.
>
> Hope this helps.
>
> Regards
> SRG
> --------------------------------------------------------------
> Raghavendran.S IMMCO, Inc. [EMAIL PROTECTED]
> GIS Analyst Alpharetta, GA phone: 678) 762-9707 X102
> www.immcoinc.com fax: (678) 762-9945
> --------------------------------------------------------------
>
>
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