Here is a new tool from Yahoo that lets you add any graphic as an overlay on a normal Yahoo map. A slider tool lets you make the graphic transparent so the underlying map can be seen.
Mapmixer gives anyone the ability to easily place a graphic (I tried GIF, JPG and PNG) over the web 2.0 version of Yahoo’s interactive maps. The process takes four steps:
1 – Choose the city or location for your overlay.
2 – Upload your graphic.
3 – Adjust the size and position of your uploaded graphic so it fits the map.
4 – Tag and publish your Mapmixer.
This site has a lot of potential for educational projects.
To appreciate the above map a little more, check out the full screen version.
![Manual Aperture [405/1000]](http://farm8.staticflickr.com/7055/6849853919_313cb31dae_t.jpg "Manual Aperture [405/1000]")
![Big Tree Beside Road [404/1000]](http://farm8.staticflickr.com/7151/6844404451_6d2eb083df_t.jpg "Big Tree Beside Road [404/1000]")
![Night Lights [403/1000]](http://farm8.staticflickr.com/7184/6844370787_1f6ab62b3f_t.jpg "Night Lights [403/1000]")
![By the light of the full moon [6/52]](http://farm8.staticflickr.com/7160/6838220175_5659a56fdc_t.jpg "By the light of the full moon [6/52]")
Great link. The opacity option makes the tool really useful. I think I may have to play with this one a bit and see if I can use it in class.
Thanks!