Friday, April 6, 2007

Follow up to Median Household Value for Washington

I just recently discovered the TimeSpan element in KML and thought it might be an interesting way to animate the maps. To try this out, I add this to the maps I discussed in my previous post. The dates are arbitrary, but I gave each block group a date starting from the one with the lowest median household value and ending with the block with the highest. You can see the effect in the following video which animates the drawing of each of the block groups: building all of them up in order and then removing them in reverse order.

In Google Earth you can control many aspects of the animation, including the speed at which it moves through dates. I think this may be an interesting way to make the maps come alive a bit more.

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