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Correct base_z (height) for Surface Volume (3D) with z_factor != 1?

Question asked by amilt on Aug 18, 2016
Latest reply on Aug 18, 2016 by Dan_Patterson

What are the correct units for input base_z (height) into Surface Volume (3D) when the z_factor is not default (1.0)?

 

I am working with a DEM which has lateral (xy) units of meters and vertical (z) units of centimeters. I need to calculate the volume below a height (measured in centimeters). I have used the following syntax to do this:

 

arcpy.SurfaceVolume_3d(r'C:\mydem.tif', r'C:\mycsv.csv', 'Below', height, z_factor=0.01)

 

Should the base_z (height) be specified in units of meters, or units of centimeters?

 

Note some related topics/questions:

How does z_factor affect Surface Volume (3D) units?

Correct units for z_factor in Surface Volume (3D)?

Units for Surface Volume tool

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