Tuesday, July 10, 2007

Smoothing the GRIB

The smoothing algorhythm mentioned in an earlier post can be adapted to the GRIB Data.
It allows you to turn this:

into that:

This smoothing is spatial, in other words, it fills the gap between the points.
This can reduce substantially the size of the GRIB data to download, as it gives the possibility to rebuild the data between the actual points. This will need some validation, but that sounds promising. SailMail users might be concerned; on the example above, the size of the GRIB file is ~15 times smaller.
The next step will be to add a time dimension, smoothing the wind across several frames.
Keep posted!

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