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Earthworks Reports-Planimetric vs. Actual (slope)

  • 1.  Earthworks Reports-Planimetric vs. Actual (slope)

    Posted 11-17-2020 10:36

    I posted this to the wrong forum.  Hoping someone might be able to clarify this a little more...

  • 2.  Re: Earthworks Reports-Planimetric vs. Actual (slope)

    Posted 11-17-2020 13:09

    Unfortunately no. Which is pretty silly because you can do it in the controllers. You either have to run the surface information report or the surface area tml. 

  • 3.  Re: Earthworks Reports-Planimetric vs. Actual (slope)

    Posted 11-18-2020 05:08

    As Pat says if you want the surface area of a surface you can use the Surface Information Report to determine that. If you have multiple areas of a surface that you want to determine the areas for then you can apply Textures to the areas and each separate Texture Type will report a separate Surface Area in the Surface Information Report. If you have 3 areas of the same texture and they are all called GRASS for example then they will aggregate in the Report to give you the total surface area of GRASS. If you call them GRASS1, GRASS2, GRASS3 then you will get 3 separate surface areas in the Surface Information Report. These results all pertain to surface areas of a single surface.


    When you run the Earthwork Report the tool determines where you have Areas of Cut and Areas of Fill, to give you a report of the areas of the site where you have Cut or Fill to carry out. While it could give you a surface area, it would be of the Isopach not the Existing or Design surface, and that surface area would not be the same as the surface area of Cut on the Design or on the existing surface. To get that you have to reproject the 0 contour from the isopach between the two surfaces onto the Design or Existing and then determine the areas of the triangles in either of those two surfaces to get the surface area of cut or surface area of fill in the Existing or Design Surface. Typically when you do this people also want to know that broken out into slope ranges as well - this is what we do in the  Surface Area by Slope Range command which is defined for exactly this purpose.


    You could argue that because we are computing the Cut / Fill Isopach in that Surface Area by Slope Range command that we should also report the volumes and the planimetric areas of Cut and Fill and I have just logged that in as an enhancement so that we can generate you the areas of Cut or Fill on either Existing or Design by Slope Range and give you the Cut Fill quantities between the surfaces all in one command and the plan areas of Cut / fill as well.


    If you want to query a surface area you can also do that with the Find Surface Area command.