I believe that this image is one of the best images in Commons illustrating the operation of a sundial. The dial itself is uncluttered, while the essential details - the numbers and the shadows - are clear. Also, by emphasising that in the Southern Hemisphere, the numbers go the opposite direction to a similar sundial in the Northern Hemisphere, the reader is reminded indirectly that sundials need to be adjusted for latitude. -- Martinvl (talk)
Comment, the scope is way too broad. Please consider something like The sundial in the Castle of Good Hope, Cape Town. We don't want to exclude pictures of all the other sundials in South Africa, let alone all those in all the other southern hemisphere countries. DeFacto (talk). 10:06, 6 December 2015 (UTC)[reply]
@DeFacto: Please read #2 of the Valued image criteria and pay particular attention to the word "generic". If you trawl through all the subtrees of Category:Sundials in the Southern Hemisphere, you will find 53 images of which this image is the only other vertical sundial. At this moment in time, my scope covers exactly two images. If better images are made available, then the VI status of this image can easily be displaced by a better image. Moreover if you read the supporting text, you will see that this image's location in Cape Town is purely coincidental, the supporting text would have been the same had it been in Sydney, Buenos Aires, Santigo (Chile), Auckland or any other town well south of the Tropic of Capricorn.
@Jacek Halicki: Sundials like this one are designed to be read from ground level, so it is entirely appropriate to show it how it would be seen. Also, if the photo was taken straight on, a flagpole would get in the way. (You can see the flagpole if you look to the left of the green door in the middle of this picture) Had I taken it from the other side of the flagpole, the contrast between the shadow and the pointer would not have been so great.
@Martinvl: I've brought together a few more southern vertical sundials into Category:Vertical sundials in the Southern Hemisphere for comparison. There were 12 when I left it. The richness of variety shows why you can't do them justtice with a single scope.
Per @Jacek Halicki: the verticals of the sundial should, at least, be parallel (and vertical).
Comment@DeFacto: When you made your changes you lost the link Category:Sundials -> Category:Sundials by type -> Categoery:Vertical sundials -> ... -> File:Vertical Sundial, Castle of Good Hope.jpg. Please reinstate it. Martinvl (talk) 17:46, 6 December 2015 (UTC)[reply]
@DeFacto: It is not OK. What you have done is highly unorthodox and in fact this section warns against trying to combine too many different criteria. The way that you introduced the categories "Veritcal sundials in South Africa" has not added any value. The single entry in that category can sit quite happily in its parent category "Sundials in South Africa" amongst a number of different types of sundial (horizontal, equatorial bow sundial etc). Will you please remove all the categories that you have created. Martinvl (talk) 21:50, 6 December 2015 (UTC)[reply]
@Archaeodontosaurus: Please show me which part of the rules of VIs suggest that a locvation is neccessary. My reading of the rules and in particular of teh word "generic" tell me that if I am not illustrating the noteworthy object (in this case the castle itself), then I must drop the refernece to the main object for it to be submitted as a VI. Martinvl (talk) 07:46, 10 December 2015 (UTC)[reply]
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