[GRASS-dev] On i.histo.match (Re: On (Landsat) imagery naming patterns)

Hamish hamish_b at yahoo.com
Thu Feb 21 19:17:51 PST 2013


Nikos wrote:
> Just FYI, results look nice!  I even convert back to
> 0-1.0 via 
> 
> r.mapcalc --o "${HistoMatchedMap} = ${HistoMatchedMap} / 1000.0"
...
> ps- I wonder if *10000 is *better* for higher precision?

depending on the sensor's 8-bitnesss or not, you can probably calculate by hand now many significant digits are useful. A little bit extra probably doesn't hurt.

1 / 2^8 = 0.00390625


Hamish


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