Category Archives: Survey Practice

I qualified in the early eighties and have been in practice ever since.

MP2 Swath size

There are probably better ways of getting a handle on how high to fly the Mavic Pro2 but seeing the numbers is how I like to work, the sequence of scales is obvious and the ceiling of 120m AGL is … Continue reading

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Mavic Pro 2: GSD & map scale

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The relationship between GSD and map scale is simple in theory but the practice of getting sharp ortho results such that they function as a photo-map is not so straightforward. From the excellent Pix4D support pages: The printing scale indicates … Continue reading

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Mavic Pro 2 GSD=8mm

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The Mavic 2Pro’s L1D-20c camera has photogrammetric potential. To establish flight parameters for 1:200 scale mapping with it an effective minimum ceiling and shot interval need to be tested. In theory this is a simple application of the photo-scale equation … Continue reading

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TheoLt on TS15 Viva

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There are 3 elements to setting up the coms. Preparing the TS15 Connecting TheoLt to the TS15 Achieving the connection to CAD This post deals with the first 2 elements, the connection to CAD will wait for another day.. Step … Continue reading

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Why KAP is different to SUA photography

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Positioning a camera by kite is a straight forward affair. You can either get over your subject or you can’t. The camera lies on the path between you and the kite and although catenary or slack line comes into play … Continue reading

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Instrumenta Eccesiastica 1847

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The Ecclesiological (late Cambridge Camden)  Society published working drawings of church fittings. Here is a selection of 7 of the plates, full size scans are available on application by email.

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L1D-20c at 50m AGL

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At 50m AGL GSD is 1.17 cm/px f4, iso 100, 1/100th 120% screen grab: B

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Getting to know the Mavic Pro 2

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In preparing the PfCO required operations manual I found not all the requested fields are in the OEM  manual, although the Mavic Pro 2 is a certified type some templates require a technical specification. For the minimum voltage level for … Continue reading

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L1D-20c image quality: 1st thoughts

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This is not definitive, so far I have only used this camera on the default ‘auto’ settings but I want to get a start on this, if nothing else to set a datum for what, hopefully follows. The L1D-20c is … Continue reading

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Reality Capture..really?

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I see a lot of these and, very occasionally I see them translated into drawings, the kind of drawings clients want for mark up. The business of reality capture is storming ahead, we now have tools for passive capture like … Continue reading

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