[GLLUG] PHP GD Question

[Sean]

It is possible to do it with php/mysql/gd The GIS package might be a  
better source for the maps especially for scalability (zooms), etc. There 
is an open source GIS system, but Im not recalling the name of it offhand.



On Thu, 15 May 2003, Ex Fed wrote:

> 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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