Friday, May 21, 2010

Low Pass Javascript

As part of the runsat work, I've had a continual battle to get elevation results "realistic"

This is particularly challenging because of "noise" in the sampled elevation data.

The latest attempt at this, has been to use a low pass filter - based on work at http://mshook.appspot.com/z/firkernel.htm - to smooth the elevation data.

You can see the effect:

2 comments:

  1. This looks really good, do you still have the source for it? The link is no longer active

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    Replies
    1. The source is still out there on runsat somewhere... dig around and you may find it (although it used v2 google maps api)

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