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    By Dave Johnson

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    Surface High and Low Points

    When working on a drainage scheme it is always useful to be able to quickly identify high and low points over a surface, I am going to show you how.

    Within Civil 3D there are several toolbox options, one of which is the ability to get the software to automate the process of finding high and low points.

    As you can see from the image below, I have a surface and have been using the waterdrop feature to find my water flow paths, it would be useful to show levels and to be able to identify all other areas that may create water catchment zones. 

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    By generating surface High Low points through the toolbox, I can get full visual control of the points using the settings wizard.

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    From this point Civil 3D automates the process. Simply select your surface, select a boundary to work within (create this with a rectangle or closed polyline) and your points will appear.

    Within the selected area all high and low points will be identified, dependent on your display setting these can contain a range of information using the Civil Template styles or by creating your own.

    The benefits are that you could automate the low points to show a typical road gully along a highway scheme.

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    I hope this is a useful feature for your future drainage designs.

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