Maptitude - http://research.umbc.edu/~roswell/maptitude.html

Hi Dick:

You have done must of the work, now you have to go to step 3, and start again
step 4, which is not the right thing to do, instead you have to open the first
option of the Selection Menu which is Select by Condition, or press the blue
botton with the symbols "=><+" this command works either from the Map Window or
from the Dataview Window. Then you will be able to make a subset of any of your
saved conditions, by pressing the black triangle on the Selection Method box.
There you will have four possibilities (Create Set, Add to Set, Remove from Set
and Subset). Select the last one to be aplied over your Selection Set if you
have not named it otherwise, type in the Condition Window your new condition to
create a subset out of the first one, check the syntaxis with the Verify
button, hit 3 times Enter Key if your new condition is OK, and there you are
with a subset of the previous Selection Name, just be aware that the name of
the Set is the same you have at the begening of the process.

Good luck!

Reinaldo

P.S. Select by value is a very powerfull selection command that make a
selection set based on attributes conditions of another layer. I would like to
discuss here how to use it more... Perhaps some of you  have examples of its
use.

Dick Hoskins wrote:

> Maptitude - http://research.umbc.edu/~roswell/maptitude.html
>
> I have fooled with this for a hour and cannot get any of this to work. I
> know you are busy, but if you have the time, could you spell it out more? I
> am not a Maptitude novice, so I think I can make it work eventually.
>
> BTW, I sometimes have trouble renaming selection sets. It gives me an error
> in a dialogue box and then won't let me change the name until I close down
> the selection set tool box and open it again. Having said that ...
>
> This is what I have done.
>
> 1. Made a default selection set by using the floating bar tool that allows
> me to point to two Zipcodes and select them both while holding down the
> shift key.
>
> 2. One has a pop of 34738. The other a pop of 1821.
> 3. As a test, I want to select out the one from the default selection set
> that has the smaller population ZipCode.
> 4. I go to selection/select by value ...
>
> Now what do I do to select out the small population Zip Code in the default
> selection set?
>
> Sorry I am such a dunce, but being able to do this is important.
>
> Thanks for your help
>
> Dick Hoskins
> [EMAIL PROTECTED]
>
> Windows Haku
> "Chaos reigns within.
>  Reflect, repent, and reboot.
>  Order shall return."
>
> -----Original Message-----
> From: Larry Manire [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, August 08, 2000 6:13 AM
> To: Maptitude
> Subject: RE: [Maptitude] Learning Maptitude
>
> Maptitude - http://research.umbc.edu/~roswell/maptitude.html
>
> >Is there a way to make a Sub selection set from a selection set? Once one
> >has done a selection by condition and obtained a selection set, is it
> >possible to further do a selection by condition on that selection set?
>
> Choose the "subset" option of select by condition while the current
> selection is active.
> Use Tools-Selection or Selection-Settings to set the current set for a
> layer, or for a dataview use the pulldown on the button bar.
>
> Larry Manire
>
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