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Creating a map of United States and counties with rollovers

Posted on 2006-11-16
Medium Priority
Last Modified: 2010-05-18
I am looking to making an image map that will allow for rollovers, but the kicker is that when the user rolls over a State, only that state image changes, not the entire image, therefore I don’t have to expect the user to load a ton of images.

I have an example I did, but it replaces one 600px image with another.  Roll over Texas.
To do this I used an EPS Illustrator file exported to Image Ready.

One example of what I want to do is found at

I am looking for a program that will do this and can be used repeated as I have to do all the counties in 6 states.

Question by:jason94024
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LVL 19

Accepted Solution

billmercer earned 672 total points
ID: 17967101
I suggest you take a look at MapServer
It's an application that is specifically designed to take GIS data and render it to web-friendly formats.

Here's an example of an interactive web map created from GIS data using this system.
LVL 38

Assisted Solution

lherrou earned 664 total points
ID: 17979181

There are a number of ways you could go about this, with Flash, rollovers, etc. The fastest, easiest way I can think of would be to produce your map of the states, as you have, and place it as a background image. Then, using an imagemap, do rollovers for the states you want to highlight, swapping a transparent image for one that's all transparent except the state you are highlighting. That should make your image sizes much smaller, except for the background image. You might also use a bit of Javascript to pre-load the rollover images so there's no delay when they put their mouse over the state.


Assisted Solution

psyki_be earned 664 total points
ID: 18059383
The easiest solution for me would be Flash.
However, it's also the most expensive, and well, if you've never tried flash, it'd be a though first-time job.

Why would I use Flash?
Flash doesn't have the 'rectangular problem'.
If you want to use roll-over images, you can only use rectangular area's, right?
So, if you try 2 states next to eachother, it's possible you'll get a wrong one if you roll-over the border.
Flash doesn't have that.
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LVL 19

Expert Comment

ID: 18061809
> Flash doesn't have the 'rectangular problem'.
> If you want to use roll-over images, you can only use rectangular area's, right?

Er, wrong, actually. You can use <imagemap shape="polygon">. In fact, that's what the example the asker provided does. I don't think he wants a different medium, I think he wants a way to streamline the process of generating the maps, which in this case probably means some sort of GIS-based solution.




Expert Comment

ID: 18062758
hmmmz, you're right :o

Meh, imagemaps, don't really sue 'em a lot.

Well, uurhm, forget my previous comment.
Allthough, if I had the right images (and knew how to put those states together), I could make this in Flash in 15 minutes...
Way easier, but, indeed, not the question.
LVL 19

Expert Comment

ID: 18071962
If you happen to have ArcInfo/ArcGIS, or know someone who has it, this might be handy. 
It's a set of scripts to generate imagemaps from GIS data automatically.

Or you could always cough up $300 for MapPoint...

LVL 70

Expert Comment

ID: 18311133
Have  any of you tried google earth? Its wonderful
so this gave me the idea that
Google also has map creators
Google Map Creator makes thematic mapping simple

A really simple tool to make your own google maps to add to your website.

hope they help you and they a free too.

LVL 70

Expert Comment

ID: 18461831
jason94024  your post is now last year :)
 any feedback on your progress  or have you abandoned us?

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