Polygon Volume (3D Analyst)
Summary
Calculates the volume and surface area between a polygon and terrain or TIN surface.
Usage
-
Calculations will only be made for the portions of the input polygons and the TIN or terrain dataset surface that overlap.
Each polygon boundary is first intersected with the interpolation zone of the surface. This identifies the area in common between the two. Then, volume and surface area gets calculated for all triangles and portions thereof that fall within the intersected polygon.
The volume represents the cubic area between the selected portion of the surface and a horizontal plane located at the height specified in the Height Field parameter:
- ABOVE—Volume is calculated between the plane and the underside of the surface.
- BELOW—Volume is calculated between the plane and the topside of the surface. The surface area for the same portion of the surface is also calculated.
Syntax
| Parameter | Explanation | Data Type |
in_surface |
The input terrain or TIN surface. | Tin Layer; Terrain Layer |
in_feature_class |
The input polygon feature class. | Feature Layer |
in_height_field |
The field in the polygon's attribute table that defines the height of the reference plane used in determining volumetric calculations. | String |
reference_plane (Optional) |
Determines how volume and surface area are calculated.
| String |
out_volume_field (Optional) |
The name of the field in the output that will contain the volume calculated in the analysis. The default is Volume. | String |
surface_area_field (Optional) |
The name of the field in the output that will contain the surface area calculated in the analysis. The default is SArea. | String |
pyramid_level_resolution (Optional) |
The z-tolerance or window-size resolution of the terrain pyramid level that will be used by this tool. The default is 0, or full resolution. | Double |
Code Sample
The following sample demonstrates the use of this tool in the Python window:
import arcpy
from arcpy import env
arcpy.CheckOutExtension("3D")
env.workspace = "C:/data"
arcpy.PolygonVolume_3d("sample.gdb/featuredataset/terrain", "polygon.shp", "<None>", "ABOVE", "Volume", "SArea", "5")
The following sample demonstrates the use of this tool in a stand-alone Python script:
'''****************************************************************************
Name: PolygonVolume Example
Description: This script demonstrates how to use the
PolygonVolume tool.
****************************************************************************'''
# Import system modules
import arcpy
from arcpy import env
# Obtain a license for the ArcGIS 3D Analyst extension
arcpy.CheckOutExtension("3D")
# Set environment settings
env.workspace = "C:/data"
# Set Local Variables
inSurface = "sample.gdb/featuredataset/terrain"
inPoly = "floodplain_100.shp"
zField = "Height"
refPlane = "BELOW"
volFld = "Volume"
sAreaFld = "SArea"
#Execute PolygonVolume
arcpy.PolygonVolume_3d(inSurface, inPoly, zField, refPlane, volFld, sAreaFld)