Tag Archives: survey practice

Unlearning line: what is LOD 500?

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Can a survey scale relate to a BIM* LOD? “LOD 500: The Model Element is a field verified representation in terms of size, shape, location, quantity, and orientation. Non-graphic information may also be attached to the Model Elements.” Ref AIA, … Continue reading

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CAD … touching the Surface

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New year, new tablet, new CAD. CAD by touch on the Surface Pro 4 is interesting. On the face of it the Surface is an ideal ‘CAD on the go’ platform: plenty of processing grunt and good battery life. Sure … Continue reading

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New guidance. In providing a client with a specification for historic building survey I had a reminder that Historic England has published new guidance on drawing so I took the time to read it through. It is a guide to … Continue reading

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Diagram it!

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There are many advantages to the kite as aerial platform for photography but very few practitioners use it. One reason KAP is seen as ‘difficult’ is the reliability issue. Many clients can’t or won’t wait for the required conditions. The … Continue reading

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Protected: Disto S910 +TheoLt = cheap BIM capture?

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Topcon GPT 3000N settings for TheoLt

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  I have never been a fan of these, preferring the Heerbrugg stable but there is no denying Topcon GPT instruments are a popular choice in archaeology, especially the N versions which have a reflectorless capability. I had the good … Continue reading

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Protected: RP Elevations by TheoLt & QGIS

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A cheap tablet for TheoLt

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Tablets are becoming ubiquitous, the rise of the iPad and its Android competitors has pushed Microsoft to develop a ‘re-worked’ tablet PC by getting Windows to work like IOS or Android. Windows is now something you can drive with your … Continue reading

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Kite aerial photogrammetry: 3 developing the contour model.

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Point density. Digitising points off the mesh reveals the structure of the earthwork, the point density is approximately at .2m post spacing increasing to 0.1m at detail areas. A test patch at 0.05m did nothing to improve the model. As … Continue reading

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Kite aerial photogrammetry: 2 the DSM

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1st effort. The surface generated from the Sept 2014 block produced a very irregular model, I had hoped contouring would improve the interpretation of the earthwork but it did not. The contour model was horrible, even after taking out the … Continue reading

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