Transform
GTB.Transform History
Hide minor edits - Show changes to output
November 03, 2009, at 09:40 AM
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Command Call with 4 different transform methods applied
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Command Call with 4 different transform methods possible
November 03, 2009, at 09:39 AM
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Performs different transformations of an input dataset
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Input Data - Elevation
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Input Data - DEM (Raster Dataset) - a grid representing a continuous surface
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Four transformation methods have been implemented:
*SQR Transform sqr ( input + 0.5 ) to take care of zeros
*Logit Transform (ln ( input / 1 - input ) )
*Z-Transform ( input - mean input ) / standard deviation of input
*Z-Transform2 according to Wendroth et al. (2002): ( input - mean input - 2 x standard deviation of input ) / 4 x standard deviation of input
*SQR Transform sqr ( input + 0.5 ) to take care of zeros
*Logit Transform (ln ( input / 1 - input ) )
*Z-Transform ( input - mean input ) / standard deviation of input
*Z-Transform2 according to Wendroth et al. (2002): ( input - mean input - 2 x standard deviation of input ) / 4 x standard deviation of input
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transformed raster dataset - a grid representing a continuous transformed surface
November 01, 2009, at 07:50 PM
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%apply=img width="450" height="360" align="top"%transform/elev.jpg%%
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%width=80pct% http://www.ai-relief.org//functions/dataprep/transform/elev.jpg%%
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%apply=img width="450" height="360" align="top"%transform/command.jpg%%
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%width=80pct% http://www.ai-relief.org//functions/dataprep/transform/command.jpg%%
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%apply=img width="450" height="360" align="top"%transform/logit.jpg%%
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%width=80pct% http://www.ai-relief.org//functions/dataprep/transform/logit.jpg%%
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%apply=img width="450" height="360" align="top"%transform/sqr.jpg%%
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%width=80pct% http://www.ai-relief.org//functions/dataprep/transform/sqr.jpg%%
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%apply=img width="450" height="360" align="top"%transform/ztransform.jpg%%
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%width=80pct% http://www.ai-relief.org//functions/dataprep/transform/ztransform.jpg%%
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%apply=img width="450" height="360" align="top"%transform/ztransform2.jpg%%
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%width=80pct% http://www.ai-relief.org//functions/dataprep/transform/ztransform2.jpg%%
November 01, 2009, at 07:39 PM
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(:div input:)
'''INPUT '''
Input Data - Elevation
%apply=img width="450" height="360" align="top"%transform/elev.jpg%%
(:divend:)
(:div commandwindow:)
'''COMMAND '''
Command Call with 4 different transform methods applied
%apply=img width="450" height="360" align="top"%transform/command.jpg%%
(:divend:)
(:div results:)
'''RESULTS '''
LOGIT transform of Input DEM
%apply=img width="450" height="360" align="top"%transform/logit.jpg%%
Square Root transform of Input DEM
%apply=img width="450" height="360" align="top"%transform/sqr.jpg%%
Z-Transform of Input DEM
%apply=img width="450" height="360" align="top"%transform/ztransform.jpg%%
Z-Transform2 of Input DEM
%apply=img width="450" height="360" align="top"%transform/ztransform2.jpg%%
(:divend:)