topic Re: Correct units for z_factor in Surface Volume (3D)? in Geoprocessing Questions https://community.esri.com/t5/geoprocessing-questions/correct-units-for-z-factor-in-surface-volume-3d/m-p/582837#M19284 <HTML><HEAD></HEAD><BODY><P>go to the other links please</P></BODY></HTML> Thu, 18 Aug 2016 20:36:15 GMT DanPatterson_Retired 2016-08-18T20:36:15Z Correct units for z_factor in Surface Volume (3D)? https://community.esri.com/t5/geoprocessing-questions/correct-units-for-z-factor-in-surface-volume-3d/m-p/582836#M19283 <HTML><HEAD></HEAD><BODY><P style="background-color: #ffffff; border: 0px;">What are the correct units for input z_factor for <A href="http://desktop.arcgis.com/en/arcmap/10.3/tools/3d-analyst-toolbox/surface-volume.htm">Surface Volume (3D)</A>?</P><P style="background-color: #ffffff; border: 0px;">&nbsp;</P><P style="background-color: #ffffff; border: 0px;">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:</P><P style="background-color: #ffffff; border: 0px;">&nbsp;</P><P style="background-color: #ffffff; border: 0px;">arcpy.SurfaceVolume_3d(r'C:\mydem.tif', r'C:\mycsv.csv', 'Below', height, z_factor=0.01)</P><P style="background-color: #ffffff; border: 0px;">&nbsp;</P><P style="background-color: #ffffff; border: 0px;"><STRONG>Should the z_factor&nbsp;be specified in units of&nbsp;centimeters-per-meter, or meters-per-centimeter?</STRONG></P><P style="background-color: #ffffff; border: 0px;">&nbsp;</P><P style="background-color: #ffffff; border: 0px;">Note some related topics/questions:</P><P style="background-color: #ffffff; border: 0px;"><A href="https://community.esri.com/thread/181691">Correct base_z (height) for Surface Volume (3D) with z_factor != 1?</A>‌</P><P style="background-color: #ffffff; border: 0px;"><A href="https://community.esri.com/thread/181640">How does z_factor affect Surface Volume (3D) units?</A>‌</P><P style="background-color: #ffffff; border: 0px;"><A href="https://community.esri.com/thread/91487">https://community.esri.com/thread/91487</A>‌</P></BODY></HTML> Thu, 18 Aug 2016 20:22:14 GMT https://community.esri.com/t5/geoprocessing-questions/correct-units-for-z-factor-in-surface-volume-3d/m-p/582836#M19283 AustinMilt 2016-08-18T20:22:14Z Re: Correct units for z_factor in Surface Volume (3D)? https://community.esri.com/t5/geoprocessing-questions/correct-units-for-z-factor-in-surface-volume-3d/m-p/582837#M19284 <HTML><HEAD></HEAD><BODY><P>go to the other links please</P></BODY></HTML> Thu, 18 Aug 2016 20:36:15 GMT https://community.esri.com/t5/geoprocessing-questions/correct-units-for-z-factor-in-surface-volume-3d/m-p/582837#M19284 DanPatterson_Retired 2016-08-18T20:36:15Z