Category Archives: Survey Practice

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

PfCO, CAP 722 & the 50m bubble

This gallery contains 6 photos.

A new edition of CAP722. Following discussion with PfCO holders  I have been looking at the prohibited space restriction as published in the July 2019 edition of CAP722: The hatched area are those zones in which small UAS flight is … Continue reading

Gallery | Leave a comment

Drone head/ KAP head

This gallery contains 6 photos.

I am a little surprised at how operating SUA has changed my approach to low level aerial photography. In theory, with a drone I can wait for the light, launch, shoot and bag the frame I want. In practice this … Continue reading

Gallery | Leave a comment

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

Gallery | Tagged , , , | Leave a comment

Mavic Pro 2: GSD & map scale

This gallery contains 6 photos.

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

Gallery | Leave a comment

Mavic Pro 2 GSD=8mm

This gallery contains 6 photos.

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

Gallery | 2 Comments

TheoLt on TS15 Viva

This gallery contains 19 photos.

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

Gallery | Leave a comment

Why KAP is different to SUA photography

This gallery contains 2 photos.

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

Gallery | Tagged , , , , | Leave a comment

Instrumenta Eccesiastica 1847

This gallery contains 7 photos.

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.

Gallery | Leave a comment

L1D-20c at 50m AGL

This gallery contains 3 photos.

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

Gallery | Leave a comment

Getting to know the Mavic Pro 2

This gallery contains 1 photo.

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

Gallery | Tagged , , | Leave a comment