<p>You might find the following useful; scroll down to &quot;Vertical Declining Sundial&quot;.</p>
<p><a href="https://web.archive.org/web/20101214092541/http://www.walkingshadow.info/Publications/Scratch.pdf" rel="nofollow noreferrer">https://web.archive.org/web/20101214092541/http://www.walkingshadow.info/Publications/Scratch.pdf</a></p>

CC BY-SA 4.0
2020-02-06T01:39:18.823Z
The link broke :(
Phineas Nicolson
CC BY-SA 4.0
2020-01-03T16:09:03.600Z
Welcome. Please [provide context for links](https://astronomy.stackexchange.com/help/how-to-answer) to give the reader some idea what's there.
Mike G
CC BY-SA 4.0
2020-01-04T06:29:13.503Z
The problem with link-only answers is that if the link breaks the answer becomes useless to future readers. It's hard to recreate that entire section here, (slides 16-22)  but if you can add at least a quick summary that will make this a better Stack Exchange answer. I looked at it and it's over my head, otherwise I'd just add it myself. *Thanks!*
uhoh
CC BY-SA 4.0
2020-01-03T14:55:27.747Z
2024-03-04T23:34:39.397Z
2024-03-04T23:34:39.397Z
Ann Buggy Dune
<p>I understand how to construct South-facing vertical an horizontal sundials and the geometry behind their construction by projecting an equatorial sundial into a plane, but I can't quite get how to do that for a declined plane.</p>

CC BY-SA 4.0
2018-10-28T16:09:17.140Z
http://www.pandy.me.uk/sundials/wd_calc.htm may help
James K
CC BY-SA 4.0
2024-03-05T01:15:35.313Z
Also see https://en.wikipedia.org/wiki/Schema_for_vertical_declining_dials
PM 2Ring
<the-sun><time>
How does the geometry for constructing a declining vertical sundial work?
Phineas Nicolson
# How does the geometry for constructing a declining vertical sundial work?

(Asked by: username_0 on 2018-10-27)

I understand how to construct South-facing vertical an horizontal sundials and the geometry behind their construction by projecting an equatorial sundial into a plane, but I can't quite get how to do that for a declined plane.

**Tags:** the-sun, time
> **Comments:**
> **username_1**: http://www.pandy.me.uk/sundials/wd_calc.htm may help  
> **username_2**: Also see https://en.wikipedia.org/wiki/Schema_for_vertical_declining_dials  

---

## 1 answers

### Answer by username_3 on 2020-01-03. Score: 1 | Accepted answer

You might find the following useful; scroll down to "Vertical Declining Sundial".

<https://web.archive.org/web/20101214092541/http://www.walkingshadow.info/Publications/Scratch.pdf>

> **Comments:**
> **username_4**: Welcome. Please [provide context for links](https://astronomy.stackexchange.com/help/how-to-answer) to give the reader some idea what's there.  
> **username_5**: The problem with link-only answers is that if the link breaks the answer becomes useless to future readers. It's hard to recreate that entire section here, (slides 16-22)  but if you can add at least a quick summary that will make this a better Stack Exchange answer. I looked at it and it's over my head, otherwise I'd just add it myself. *Thanks!*  
> **username_0**: The link broke :(  

---

