[GLLUG] PHP GD Question

[Mark Szidik/mlc]

I have two ideas, but have not done this before.

Low tech:
------------
Use Gimp to manually pre-color all possible image combinations, then PHP
just pulls static images from files.

High tech:
------------
See these articles on scripting Gimp.
http://imagic.weizmann.ac.il/~dov/gimp/perl-tut.html
http://dot.kde.org/974744841/974970910/


-Mark Szidik

linux-user-admin@egr.msu.edu wrote on 05/15/2003 01:33:55 PM:

> Hello Everyone!
>
> We use models to predict the possiblity of a plant disease or pest
> emergence.  This is based upon an algorithm that takes as input hourly
> weather information to include humidity, temperature and precipitation.
It
> requires  seven days of data to calculate this probability.
>
> On a dynamic webpage, I want to display these percentages on the screen
with
> a color legend and have the appropriate county on the Michigan Map
colored
> corresponding to the statistical probability calculated.  I would like
the
> user to be able to select past weeks to see the probability, but the
default
> map displayed would show the probability of the past seven days.
>
> Does anybody out there know if it would be feasible to use PHP and GD
> somehow to color in individual counties on a State Map image.   The
> coloration would be determined values that were stored in a Mysql
database
> or determined by an algorithm that worked upon the values in a Mysql
> database.  Unfortunately, these are not simple rectangles, arcs, squares,

> the counties are pretty complex shapes.
>
> Or would this be a lot of work that might be accomplished by use of a
good
> GIS/mapping package?  Does anybody out there have any experiences with
GIS
> with Linux / Mysql acting as a server/datasource, serving up dynamic maps
in
> users web browsers?
>
> Appreciate your input,
>
> Lee Duynslager
>
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