Shadow analysis has never been easier with a plethora of software out there that will calculate and plot the position of a shadow quickly and easily. Is this ‘black box’ software getting it right and what does it actually mean on the ground? These are questions that Council has been asking on a recent project.

BCL Surveyors were able to certify (via first principal astronomical and spherical trigonometric calculations) the accuracy of the calculations. We also marked out the actual predicted shadow on the ground for Council Officers to inspect. Our team raised awareness of the fact that the sun is a disk and not a point light source and thus the effects of Umbra and Penumbra should always be considered in any analysis.

Council recognise BCL Surveyors as experts in this field. If you need shadow expertise contact our team.

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