About this site, and how to reach it

What this site is

A documentation project about a narrow technical subject: how cameras are placed in the strip of air between roughly thirty and five hundred feet, and what that placement does to a photograph. It covers tethered aerostats and balloons, kites, telescopic masts and small unmanned aircraft, along with the optics, the survey vocabulary and the airspace rules that surround them.

It is not a business. Nothing here is for sale, no service is offered, there is no advertising, and there is no arrangement with any manufacturer or operator. There is also no contact form, because a form implies a service behind it.

How the pages are written

• numbers are given with their units and their reference conditions, and with the formula that produced them wherever one exists;
• regulatory text is cited by section, so a reader can check the current version, which is the only version that matters;
• worked examples are labelled as examples and are not presented as specifications of any real equipment;
• no prices are published, because a rate stated once is misleading forever;
• where the writer is unsure, the page says so instead of rounding the doubt away.

Corrections

Errors are fixed in place rather than by publishing a new page, and the revision line at the top of the affected text changes. If you find a figure that is wrong, a citation that does not say what it is claimed to say, or an explanation that is simply muddled, please write. Corrections are welcome and are the main reason this address exists.

Publisher and technical notes

This site is published by a private individual on a non professional basis. It is not operated by or on behalf of a company, it carries no commercial activity, and it collects nothing from its readers. Contact for any matter concerning the site: contact@blimpphoto.com.

Technically it is a set of static HTML files with a single stylesheet, served from a content delivery network. There is no analytics, no tracking pixel, no advertising script, no cookie set by this site, no comment system and no font or asset loaded from a third party server. A page you open here causes no request to anywhere except this domain.

Use of the text and images

The text and the page design are the work of the publisher. Short quotations with a link back are welcome and need no permission. Wholesale reproduction is not. Where an illustration accompanies an article it is there to explain the geometry or the equipment described in the text, and its caption says what it shows.

Nothing on this site is professional advice. Descriptions of aviation regulation are an introduction for readers and are not a substitute for the current regulatory text or for speaking to the appropriate authority. Descriptions of contractual, survey or legal practice are general observations, and the specific answer for any project depends on that project.