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Trying to get some calculations done.

But as soon is the band and the attributes are combined the calculation fails.

The pic shows the expressions.

The first 2 get a values rest drop to No Data.

Tried rounding using int8, 16 etc. , ceiling. Every time same result.

Tried different interpretations.

The input is a DEM; min= 0 and max 519 (Real64)

Any tips on this?

The calculation is a non-iterative variant for gradients. These work neatly in python script I made (did not invent the calculations , mind you)

tx for any thoughts!

From the image you're going from a DEM in the range of 0-519 and casting (bounded) it to an int8 (-128-127) and then casting it again to grey8 (0-255)? But then how is the min-max range 255? Was the interperetationCoercer set to UINT8 when you got the inspector results?

What purpose does the RasterSelector serve? The RasterInterpretaionCoercer forces the raster to a single band, and the RasterExpressionEvaluator does not take into account band selection regardless.

I'm also not able to replicate your issues.

Does your source data have a NoDataValue set?

Hi @gio, the RasterExpressionEvaluator could generate unexpected results if the input raster had Nodata definition. If the input raster has Nodata, try removing the Nodata with RasterBandNodataRemover beforehand.

@takashi

Way to go Takashi!

Removing the Nodata solved it!

That was indeed the problem.

Thanks!

Arigat?gozaimashita (I hope it is correctly written )

@takashi

Way to go Takashi!

Removing the Nodata solved it!

That was indeed the problem.

Thanks!

Arigat?gozaimashita (I hope it is correctly written )

Correct, but just "Arigato" is more friendly :-)

 

Formal and informal. Maybe similar to the difference between "Alstublieft" and "Alsjeblieft".

 

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