Author Archives: dougaj4

Spherical Geometry and Vincenty’s Formulae

Posted on 27/09/2020 by dougaj4

Wikipedia has detailed articles on: Spherical Geometry  and Vincenty’s Formulae (for geometric calculations on an ellipsoid). The spreadsheet Vincenty.zip uses those resources to perform the following calculations, using both on-sheet calculations and VBA user-defined functions (UDF’s): Calculation of distance and … Continue reading →

Posted in Computing - general, Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 7 Comments

Melanie Safka + Miley Cyrus

Posted on 25/09/2020 by dougaj4

I have previously posted a link to a young Melanie singing Look What They Done to my Song, Ma.  45 years later, she got together with Miley Cyrus to sing the song again, and they both look like they had … Continue reading →

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Import Data from a Picture to Excel

Posted on 16/09/2020 by dougaj4

The myOnlineTraininghub blog recently had a post entitled Import Data from a Picture to Excel which sounded promising, since I often need to extract data from Autocad files saved to a pdf. From the link, it seems that if I … Continue reading →

Posted in Computing - general, Excel | Tagged , , , | 1 Comment

Wembley Tower 2

Posted on 04/09/2020 by dougaj4

Following from the previous post, nearly all of the 68 designs for the Wembley Tower were in steel or iron, but there was just one with a truly unique design feature, it was to be built of concrete: If it … Continue reading →

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The Wembly Tower

Posted on 30/08/2020 by dougaj4

Late in the 19th Century a group of Londoners decided that London should have a tower taller and grander than the Eiffel Tower.  A competition was held, and construction started at the then rural area near Wembly, but construction and … Continue reading →

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