Hello Hendrik,
I don't think you can do this as a thematic map, but you can do it in
mapbasic, by setting the width of all lines in points instead of pixels.
Pixels only allow the value 1-7, while points is a value from 0.1 to 203.7
in 0.1 steps. You just have to set up an expression based on your migration
that results in a proper value for the widths.
You will probably have to loop through all objects to do this or define your
own function and use that in the "update" command.
Regards
Uffe
----- Original Message -----
From: "Possberg, Hendrik" <[EMAIL PROTECTED]>
To: "Mapinfo-List (E-Mail)" <[email protected]>
Sent: Friday, August 05, 2005 10:21 AM
Subject: MI-L Thematic Map with Arrows
Dear List,
I am looking for a way to create a specific type of thematic Map with
Mapinfo.
I do not know the correct name of this type of maps but want to describe
what I mean.
I have some polygons representing cities and now I want to show the
migration movements between these cities.
This should be done with arrows. The thickness of these arrows should vary
according to the value of migration.
My Questions:
What is the name of this thematic map?
Is this possible with Mapinfo ? (7.8 is available)
Does anybody know a MBX which produces these maps?
If not, does anybody have an idea what should be done to write an
Application for MI. (Mapbasic Available)
Thanks in Advance.
Hendrik Poßberg
Manager Geodaten
microm Micromarketing - Systeme und Consult GmbH
Hellersbergstr. 14
41460 Neuss
Tel: 02131/109-751
Fax: 02131/109-777
email: [EMAIL PROTECTED]
www.microm-online.de <http://www.microm-online.de/>
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