Hi Beatriz,
There are several ways to do what you need with Maptitude. The
suggestion of overlaying is quite good, but you will have to train how
to use this command. I suggest you overlay your counties to your points
and then use the count of points (the count option should be activated)
on the resulting overlay map as the field to create your choropleth map.
I personally would prefer something like Mr. Keeble has suggested, but
you might do it in a straightforward way (no need to use excel neither
to pivot a table). You can do the following:
1) Create a integer field on your county layer, you can name it Count,
for instance.
2) Go to your points field and do the same thing, creating also an
integer field (you can name it Count as well, or as you wish)
3) Go to the dataview and fill the field of your point with number 1
(right click and Fill => Single value => 1)
4) Go back to the Counties dataview, right click on the empty Count
field and: Fill, Tag, Aggregate, Layer (your points layer), Tag with
(Count Field) live the other lines as they are and continue bellow to
Aggregate Settings, Fill with Total, and select your Count field. Press
OK and you are done!
I have just realizing while testing this that it is not necessary to
create the count field on the Points layer and to fill it with ones, you
might just ignore those steps, (you still will need to have a numeric
field on the county layer), and go directly to step 4 above, using the
count option that will be available when you enter the Aggregate
Settings. The result will be exactly the same but you can do the whole
process only on two steps, no need now to go over steps 2 and 3.
Cheers and good luck,
Reinaldo
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Beatriz Woods wrote:
I located 7,800+ records and they now have the latitude and longitude
in the dataview.
I want to map these in a color theme based on county, ie, 6 members in
this county is light green, 180 members in that county is darker green.
How do I join the two based on areas of latitude/longitude in my
dataview with the County layer?
Thanks.
