Building Elevation Surveys
Under normal circumstances surveys are carried out in plan, as we would expect to see detail appearing on plans and drawings. On large surveys we make allowances for the curvature of the earth by applying projections, such as Transverse Mercator, as used in the UK. We take vertical detail into account by showing spot levels, contours, sections and in many cases 3D perspectives.
Not all surveys fall in this category, and there is a need to show the profile of detail in plan. Surveys of bridges and buildings fall into this category. But when displayed we see a series of single lines superimposed on top of each other, as shown below.
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Traditionally, elevation surveys are rotated so that the long dimension of the building aligned with the X axis and then the Z and Y axes are exchanged, flipping the survey into plan. A tool has been provided in n4ce to do this. In fact any axis can be switched here. |
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Before axes can be switched the elevation survey needs to be rotated. This is best done in the graphics environment, using tools found in the Model. This tool is NOT available to users of the Survey edition, so precluded them creating elevation in n4ce. |
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An option has bee introduced into n4ce making it easier to perform, process and view elevation surveys.
It doesn't matter whether the data is created in Observations as from a single or twin setups using angle intersections. Likewise data can be processed onboard the instrument and exported as coordinates directly. All options are catered for. |
Selecting the Building elevation option from the tools menu, you will be invited to select the ends of the reference base line which is used for projecting points. |
A new Elevation folder will be created which contains the rotated and projected points, as shown above. There are No tools in the Survey edition for finishing of the survey, linking lines graphically etc. This is best done in one of the more feature packed n4ce packages, such as Lite, Professional or Designer. Or alternatively, export this basic framework into another CAD package such as AutoCAD or MicroStation. Impressive results are possible, as shown below.
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