Angled Borehole does not show up correctly in gINT

I have a borehole drilled at 20 degrees off vertical (downwards). I want to export a Fence, but gINT can't seem to get the angle to appear correctly. Notes:

- I'm using an interger azimuth of 45 in the correct field, and my fence report is looking at the right field (HOLE_ORNT or something like that)

- I'm using a plunge of -70, in the default field in the POINT table (POINT.PLUNGE)

- when I export a dxf fence, and my horizontal and vertical scales are the same so that I can directly measure the angle, the borehole is angled at 45 degrees!

- if I export to a standard report so that my vertical and horizontal scales are different, it still shows a wildly angled borehole instead of simply a borehole on a slight decline. Again, the horizontal distance from the collar to the toe indicates that the borehole is actually dipping at around -45, not -70

Has anyone else had this problem?

Thanks, M

  • Hi Mike,

    it is possible that it is either file specific or version specific. I have tested your numbers in my files and I see what I believe to be the expected outcome.

    I am making a few of assumptions. One that you are using the latest version of the program or at least something within the last year. Two you are using one of the AGS files sets ( I am guessing based on the fields you are referring to).

    So here is my example output with your numbers. I am using AGS 4 file set with point orientation support turned on. You do not need to reference any fields in the fence report properties when using point orientation support . When using point orientation all you need is one entry for a single angle.

    For reference on how to use point orientation support see the following

    if this is not helping please send me your library and project privately kirk.johnson@Bentley.com

    Also note what version of gINT you have installed

    thanks

  • Hi David,

    Thanks for the quick reply. In short:

    - I'm using version 08.30.04.285 (we are not paying the optional yearly fee, which means that I can't update)

    - I am using an AGS-type database. I tried both full-fledged Point Orientation support, and a simplified bearing/plunge field in the POINT table, same results

    - I created a baseline along the bearing of the borehole, so that I could directly measure the angle, see below

    - I'm getting an angle of about 50 degrees even though I have an inclination of -70 entered

    Thanks for your time!

  • Without seeing the actual files I will paste in a excerpt from our help file of reasons why the actual angle may look different.

    It would be beneficial if you sent me the files privately (library and project)including your baseline coordinates. kirk.johnson@bentley.com


    Inclined holes have POINT.Plunge values different than -90° (a blank Plunge field is the same as -90). To properly display inclined holes, you must also supply a trend or bearing value and provide the location or expression for that value in the Bearing Expression property for Fence reports. If you do not provide a bearing value for a hole and you have entered a value for the Plunge, you will receive a warning at output time.

    You may be surprised at the final output. If a hole has a Plunge of -45° it will most likely not be that steep on the output.

    There are two reasons for this.

    First, the vertical scale is generally exaggerated relative to the horizontal scale, that is, the distance on the page covering 1 horizontal scale unit might be 10 times as long on the vertical scale. This factor will alter the displayed angle of the hole significantly. The higher the exaggeration, the closer to vertical the hole angle will appear.

    The other factor is the inclination of the hole relative to the baseline. Remember that you are looking at the fence posts perpendicular to some baseline (if one is not supplied, gINT uses a best fit straight line through the boreholes). If the bearing of the hole is such that the angle is perpendicular to the baseline, you will see the hole as dead vertical, although shortened somewhat because of the inclination. If the angle is parallel to the baseline, you will see the maximum angle.

  • Thanks David, I will send you the files. But note that the help file text addresses why an angled hole might look LESS angled than it actually is (which is basically a summary of 3D geometry). My holes are MORE angled than they ought to be.

    I await your reply!
  • Update: we've tested our inclined borehole output with version 10.000.000.0000000.1 or something. Same problem: still massively overstates the angle of inclination. No response from gINT.