AnsweredAssumed Answered

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

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

What are the correct units for input z_factor for Surface Volume (3D)?


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 z_factor be specified in units of centimeters-per-meter, or meters-per-centimeter?


Note some related topics/questions:

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

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

Units for Surface Volume tool