Tuesday, February 02, 2010

Red Hot Bugs

see his website “Musings from the Chiefio

A GIS anomaly map with a 9999 hot ocean from baseline = report  period
The empty ocean goes infinite hot on a null anomaly

What to make of THIS bizarre anomaly map?

Well, you always need a baseline benchmark, even if you are ‘benchmarking the baseline’, so why not start with the “NULL” case of baseline equal to report period? It ought to be a simple all white land area with grey oceans for missing data.

Well, I was “A bit surprised” when I got a blood red ocean everywhere on the planet.

You can try it yourself at the NASA / GISS web site map making page.

“Houston, I think you have a problem”…

Well, the code NASA GISS publishes and says is what they run, is not this code that they are running.

Yes, they are not publishing the real code.

So I simply can not do any debugging on this issue, because the code that produces these maps is not available.

But what I can say is pretty simple:

If a map with no areas of unusual warmth (by definition with the baseline = report period) has this happen; something is wrong.