Cut and fill volume calculation

Hello,

I have a task where I need to calculate the volumetric difference between two DTM's. What would be the correct method to find this difference? I have attached the file with these DTM's here. 

https://www.dropbox.com/sh/7ic8lm0a9lu8wo4/AAAR8_XK5P6L3rdniegHo4WPa?dl=0

 The coordinate system is GDA 94 / MGA 56. Any assistance you can provide is greatly appreciated. 

Thanks 

Adam


Answers

  • sphillipssphillips Posts: 55
    Hi Adam,

    You can use Analysis > Measure Volume Between Surfaces

    Assuming:
    • DTM2 is the layer to subtract from
    • DTM1 is the layer to subtract

    Measurements:

    Total Volume Between Surfaces: 9947.185 cubic meters

    Cut Volume: 8038.4232 cubic meters
    Cut 2D Surface Area: 4931.6 sq m
    Cut 3D Surface Area: -
    Fill Volume: 1908.7617 cubic meters
    Fill 2D Surface Area: 13809 sq m
    Fill 3D Surface Area: -

    LAYER_COMPARE: DTM2.tif
    LAYER_BASE: DTM1.tif
    REPORT_TIME: 01/06/2017 12:23:07
    AVG_Z_DELTA: 0.327 m
    MAX_Z_DELTA: 5.345 m
    MIN_Z_DELTA: -1.599 m


    Steve
    Nats
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