Re: largest sundial
If it's not "x" used as a sundial, be aware of this 46 m gnomon (31 m height) 2009 dial in Spain : http://www.heraldo.es/noticias/aragon/zaragoza_provincia/zaragoza/2013/10/01/el_gigante_del_tiempo_vadorrey_guinness_world_record_251195_301.html Regards, Luis El 27/10/2015 a las 11:33, Jackie Jones escribió: Can someone please tell me what is the world’s largest sundial? If a vertical tower, how high above the ground is the nodus? I have been consulted by someone who is claiming that a tower he wants to use as a sundial, which is 162m tall, will be the world’s largest dial. There are many issues with a dial of this size, which will be explained to him, but I would like to know about sizes of other large dials, please. This is not just a tall building casting a shadow, but one where there are hour markings on the ground. With best wishes to you all, Jackie Jackie Jones 50° 50’ 09” N 0° 07’ 40” W --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: largest sundial
VERY NICE LOVE SELAM HARRIS -- Harris Morrison har...@shepherdswatch.com Shepherds Watch Ltd. 4855 Draper Montreal, PQ, H3X3P6 (514) 487-5544 www.shepherdswatch.com > On Oct 27, 2015, at 7:00 AM, Thibaud Taudin Chabot <tcha...@dds.nl> wrote: > > A sundial is only a sundial when you can read in some way the time and/or > date from it. > With a tower that you can not see a shadow sharp enough on the ground to read > a time and/or date when you are on the ground. Only from high above you might > get a possibility to read the result. So only the visitors high in the tower > or from an airplane. > Thibaud > > At 11:33 27-10-2015, Jackie Jones wrote: >> Content-Type: multipart/alternative; >> boundary="=_NextPart_000_000A_01D110A2.E0D09F10" >> Content-Language: en-gb >> >> Can someone please tell me what is the world’s largest sundial? If a >> vertical tower, how high above the ground is the nodus? I have been >> consulted by someone who is claiming that a tower he wants to use as a >> sundial, which is 162m tall, will be the world’s largest dial. There are >> many issues with a dial of this size, which will be explained to him, but I >> would like to know about sizes of other large dials, please. This is not >> just a tall building casting a shadow, but one where there are hour markings >> on the ground. >> >> With best wishes to you all, >> Jackie >> >> Jackie Jones >> 50° 50’ 09” N0° 07’ 40” W >> >> --- >> https://lists.uni-koeln.de/mailman/listinfo/sundial > Th. Taudin Chabot, . tcha...@dds.nl > > > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: largest sundial
Come now everyone! Tall buildings, dams No! The largest dial in the world is undoubtedly in Tasmania. Initial construction was fine but somehow the hour lines were never inscribed. Google Dial Range Tasmania and find the images of Mount Dial & Mount Gnomon. Best wishes Kevin > On 27 Oct 2015, at 19:04, R.Pauli <m...@rpauli.com> wrote: > > I heard Bill Nye The Science Guy talk about his father wanting to set out > marks for the Washington Monument. > Great idea, but the problem was the fuzzy shadow. > > > On 10/27/2015 3:33 AM, Jackie Jones wrote: >> Can someone please tell me what is the world’s largest sundial? If a >> vertical tower, how high above the ground is the nodus? I have been >> consulted by someone who is claiming that a tower he wants to use as a >> sundial, which is 162m tall, will be the world’s largest dial. There are >> many issues with a dial of this size, which will be explained to him, but I >> would like to know about sizes of other large dials, please. This is not >> just a tall building casting a shadow, but one where there are hour markings >> on the ground. >> >> With best wishes to you all, >> Jackie >> >> Jackie Jones >> 50° 50’ 09” N0° 07’ 40” W >> >> >> >> --- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> <https://lists.uni-koeln.de/mailman/listinfo/sundial> >> > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > <https://lists.uni-koeln.de/mailman/listinfo/sundial> > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
largest sundial
Can someone please tell me what is the worlds largest sundial? If a vertical tower, how high above the ground is the nodus? I have been consulted by someone who is claiming that a tower he wants to use as a sundial, which is 162m tall, will be the worlds largest dial. There are many issues with a dial of this size, which will be explained to him, but I would like to know about sizes of other large dials, please. This is not just a tall building casting a shadow, but one where there are hour markings on the ground. With best wishes to you all, Jackie Jackie Jones 50° 50 09 N0° 07 40 W --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: largest sundial
He or she should hurry, seems there are already plans to transform the Berlin Fernsehturm into a giant sundial (368 m) by marking the hours on surrounding buildings. http://www.sonnenuhr-berlin.com/ Dan Uza On Tue, Oct 27, 2015 at 12:33 PM, Jackie Jones <jac...@waitrose.com> wrote: > Can someone please tell me what is the world’s largest sundial? If a > vertical tower, how high above the ground is the nodus? I have been > consulted by someone who is claiming that a tower he wants to use as a > sundial, which is 162m tall, will be the world’s largest dial. There are > many issues with a dial of this size, which will be explained to him, but I > would like to know about sizes of other large dials, please. This is not > just a tall building casting a shadow, but one where there are hour > markings on the ground. > > > > With best wishes to you all, > > Jackie > > > > Jackie Jones > > 50° 50’ 09” N0° 07’ 40” W > > > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > -- Dan-George Uza http://cerculdestele.blogspot.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Largest sundial...
Title: Largest sundial... O Jackie Jones! With the "largest sundial" the situation is pretty similar as with the tallest girl! It is not necessary to be the tallest girl in town, but to be the most beautiful girl! I remember pretty well the situation many years ago in Japan: The Mayor of Minami-Mura had invited me and two Japanese Gnomonists for a meeting and he told me he would be so eager to get into Guinnes Book Of Records with his recently completed big sundial on the roof of their conference hall. When I smiled at him and told him it would be better to have the most beautiful sundial of the world, I realized it was not what he wanted to hear... However, through me and my article "A Dialing Excursion In Japan" both his sundial and the in the same month founded Japanese Sundial Society got a wonderful propaganda: A picture of this sundial appeared on the front page of NASS Compendium!http://www.ta-dip.de/fileadmin/user_upload/bilder/5d541d9fe13b8c336a1dba1e4f8439f4_nass_71_A_Dialling_Excursion.pdf In DGC-Mitteilungen Nr. 111 in autumn 2007 I have published an article about very big sundials and a very small sundial, built by Giuseppe Ferlenga: http://www.ta-dip.de/fileadmin/user_upload/bilder/3735fdf34abe3bb8fd043dd0b786d9a3_Nr_111_ganz_grosse.pdf Do you know Ferlenga's tiniest sundial of the world? If not, have a look at my above mentioned article in German language "Über ganz große und eine ganz kleine..."Meanwhile the fantastic French dam sundial was invented by Denis Savoie and celebrated as the world's biggest sundial... Une horloge solaire sur le barrage de Castillon You could find several pictures and also French links under http://www.ta-dip.de/dies-und-das/schwarzes-brett.html Scroll down to almost the end of the link! What I wanted to say: Do not aim to build the tallest, biggest, largest ... sundial, but think A LOT about THE BEAUTY of your sundial! The sundial of Denis Savoie and his friends and supporters is both very large and very beautiful and very special! You will have to try hard to top this sundial! :-)Good wishes to you! Reinhold Kriegler Can someone please tell me what is the world’s largest sundial? If a vertical tower, how high above the ground is the nodus? I have been consulted by someone who is claiming that a tower he wants to use as a sundial, which is 162m tall, will be the world’s largest dial. There are many issues with a dial of this size, which will be explained to him, but I would like to know about sizes of other large dials, please. This is not just a tall building casting a shadow, but one where there are hour markings on the ground. With best wishes to you all, Jackie Jackie Jones 50° 50’ 09” N 0° 07’ 40” W * ** *** * ** *** Reinhold R. Kriegler Lat. 51,8390° N. Long. 12,25512° E. GMT +1 (DST +2) www.ta-dip.de http://www.ta-dip.de/dies-und-das/r-e-i-n-h-o-l-d.html http://www.ta-dip.de/salon-der-astronomen/musik-im-salon-der-astronomen.html --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: largest sundial
I heard Bill Nye The Science Guy talk about his father wanting to set out marks for the Washington Monument. Great idea, but the problem was the fuzzy shadow. On 10/27/2015 3:33 AM, Jackie Jones wrote: Can someone please tell me what is the world’s largest sundial? If a vertical tower, how high above the ground is the nodus? I have been consulted by someone who is claiming that a tower he wants to use as a sundial, which is 162m tall, will be the world’s largest dial. There are many issues with a dial of this size, which will be explained to him, but I would like to know about sizes of other large dials, please. This is not just a tall building casting a shadow, but one where there are hour markings on the ground. With best wishes to you all, Jackie Jackie Jones 50° 50’ 09” N0° 07’ 40” W --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: largest sundial
Already built a vertical flat sundial with 240 m^m http://kepleruhr.eu - horizontal ones could be much bigger... Kurt Niel Am 27.10.2015 20:04 schrieb "R.Pauli" <m...@rpauli.com>: > I heard Bill Nye The Science Guy talk about his father wanting to set out > marks for the Washington Monument. > Great idea, but the problem was the fuzzy shadow. > > > On 10/27/2015 3:33 AM, Jackie Jones wrote: > > Can someone please tell me what is the world’s largest sundial? If a > vertical tower, how high above the ground is the nodus? I have been > consulted by someone who is claiming that a tower he wants to use as a > sundial, which is 162m tall, will be the world’s largest dial. There are > many issues with a dial of this size, which will be explained to him, but I > would like to know about sizes of other large dials, please. This is not > just a tall building casting a shadow, but one where there are hour > markings on the ground. > > > > With best wishes to you all, > > Jackie > > > > Jackie Jones > > 50° 50’ 09” N0° 07’ 40” W > > > > > ---https://lists.uni-koeln.de/mailman/listinfo/sundial > > > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
RE: largest sundial
> I heard Bill Nye The Science Guy talk about his father wanting to set out marks for the Washington Monument. A few of us met with Bill Nye's father in 1994 when we were in Washington for the first NASS annual conference. I had made a map of the venues. http://www.twigsdigs.com/annex/washmon/washmon.html Bob _ From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of R.Pauli Sent: Tuesday, October 27, 2015 3:05 PM To: sundial@uni-koeln.de Subject: Re: largest sundial I heard Bill Nye The Science Guy talk about his father wanting to set out marks for the Washington Monument. Great idea, but the problem was the fuzzy shadow. On 10/27/2015 3:33 AM, Jackie Jones wrote: Can someone please tell me what is the worlds largest sundial? If a vertical tower, how high above the ground is the nodus? I have been consulted by someone who is claiming that a tower he wants to use as a sundial, which is 162m tall, will be the worlds largest dial. There are many issues with a dial of this size, which will be explained to him, but I would like to know about sizes of other large dials, please. This is not just a tall building casting a shadow, but one where there are hour markings on the ground. With best wishes to you all, Jackie Jackie Jones 50° 50 09 N0° 07 40 W --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Largest Sundial
Based on a perusal of Guiness' World Records in the early 1990's, this honor goes to the Disney sundial in Orlando, FL, USA. However, the basis is not clear. Is it the footprint or its height or the total volume occupied, or ? Hal Brandmaier 40 degr 59 min latitude, 73 degr longitude.
Largest Sundial
Does anyone know what the largest sundial in the world is? For some reason I seem to think India -- but when searching the WWW, could not find the answer. Thanks! -
Re: Largest Sundial
Romano, Judith wrote: Does anyone know what the largest sundial in the world is? For some reason I seem to think India -- but when searching the WWW, could not find the answer. Thanks! - This was debated here three years ago. I think you're right that the largest purpose-built man-made sundial is indeed at Jaipur in India. There are some larger natural features that act as sundials, including three mountains in a German-speaking area (Austria, perhaps, I forget?) and someone pointed out that the whole globe is a sundial. I recently read in The Sunday Times (a British newspaper) that the biggest sundial in Europe is in a town in Russia. They had a picture of it. Hope this helps Chris Lusby Taylor 51.4N 1.3W -
Re: Largest Sundial
On the Internet adress http://www.eastland.tourism.co.nz/Sundial/dialinfo.htm I find a picture and the following text concerning a sundial in Gisborne (New Zealand) 'the first city to see the light', planned on the occasion of millennium 2000. The Guinness Book of Records recognises the worlds largest sundial as situated at Jaipur in India. Built in 1724, the Samrat Yantra sundial is 36 metres high with a gnomon length of 27 metres. A preliminary concept design of the sundial structure for Gisborne has been prepared in conjunction with Opus International Consultants Ltd and a local design team consisting of Marcus Smiler, Derek Lardelli, Sandy Adsett, and Phil Parker. The structure will be 45 metres high (equivalent to a 13-storey building) with a gnomon length of 68 metres. Willy Leenders Flanders in belgium 50,9 N 5,4 E mailto:[EMAIL PROTECTED] Romano, Judith wrote: Does anyone know what the largest sundial in the world is? For some reason I seem to think India -- but when searching the WWW, could not find the answer. Thanks! - -
Re: world's largest sundial
Luke Coletti wrote: Fer, You mention above that for 12-26 there is a variation in the EoT between -9 and -46 seconds, a 37 sec delta, over a four year period. Which 4 year period did you calculate for? I have calculated and included below both the solar day length and EoT values for 12-26 over a twenty year period. The max delta between succeeding EoT values and the 1995 value, column G, over the twenty year period reaches 23.5 secs in 2012. It can also be seen that on periods of four years from the starting point in 1995 the delta reaches only 1.6 secs after twenty years! I used the 1995 USNO formulas as listed in section C page 24. Perhaps you can let me know which methods you used to calculate the 37 sec delta and over what period. Regards, Luke Coletti snip Luke, I answered your e-mail, but something went wrong with sending it and I don't have a copy anymore. So I start again. I have to admit I made a (typing?) error in my e-mail. The value -9 sec. is false. I calculated the EoT with my program equadecl. The values are for 12:00 UT.( accuracy + or - 5 sec. I think) 1996 : -46 sec. 1997 : -38 sec. 1998 : -31 sec. 1999 : -24 sec. 2000 : -46 sec. The difference in a 4 years period is 22 sec., about the same as you calculated. Sorry for my error in my earlier e-mail.
Re: Worlds Largest Sundial
Tad Dunne wrote; I suggest a good measure is not the largest dial but the most accurate to the naked eye. Some really big ones might fail to take the equation of time into account. Small ones with an analemma might read to the nearest 5 minutes or so, while larger ones with an analemma might read to less than a minute. A consistent way of measuring this is a) does it tell accurate local time and b) how wide, in seconds, is the width of the gnomen's shadow. - Tad Dunne Tad, although it is off the major point intended in my own World's Largest Sundial, I agree with you that we might justifiably rate dials for operational performance, rather than for size. Fer deVries has already well addressed the issue of accuracy vs precision as as it relates to : your a) does it tell accurate local time. That leaves your : b) how wide, in seconds, is the width of the gnomen's shadow. Firstly, I suggest the structure of the graded transition from shadow to full illumination at the edge of the gnomon's shadow limits performance. This is a function of the about 0.5 degree apparent angular diameter of the sun, but it is significantly affected by atmospheric scattering, refraction, by contrast dillution from secondary light, by the reflective properties of the surface upon which the shadow is projected, and so forth. Let us lump all this together, and call it the angular limit of the shadow's resolution, and for this discussion's purposes, assign to it a rough value of 1/2 degree of arc. (The hour angle of the sun of course changes by this amount in 2 minutes of time, or 4 seconds time per minute arc.) Secondly, let us adopt the optician's standard accomodation near-point for the naked eye as 25 cm, (10 inches,) and the rule-of-thumb eye's resolution of 1 minute of arc as another limit. Finally, let me state that given the task of visually cutting a symmetrical image-object for measurement purposes, most observers can find the symmetry axis to better than 1 part in 60 of the object's width, and many can do so quite consistantly to 1 part in 120 as verified by experiment. (This assumes that the image-object angle is large enough for the least count interval to equal or exceed the previously invoked 1 minute visual resolution practical limit.) That suggests that we can shoot for a reading limit of roughly 1 second of time. This is not a hard figure, but is one resulting from the above empirical assumptions. Experience suggests that under GOOD conditions this can be met, and perhaps improved upon a bit. (The error for the nonsymmetrical readings of a single shadow edge is much greater.) Without presenting all of the intermediate steps, qualifiers, and exceptions of my argument here on the list, I believe that it can be estimated that in order to get maximal time-measurement performanance from a sundial, there is little need to make a dial larger than is capable of fitting within a cubical box, 50 cm (20 inches) on a side and that a minimum size full-performance dial will require at least a 25 cm (10 inch) box. (With a bow to Tony Moss for the prismatic form of that quantification.) Again, these estimated limits cannot be taken as exact, but are an honest try. As an independant test of my assertions, I suggest comparison to the dimensions of historical specimens of the class of dials known as heliochronometers. Many expert designers and experienced builders, seeking highest performance, have produced instruments that fall within my estimated size limits. This in no way speaks to the many other good reasons for building larger-scale dials, but only addresses the restricted question as outlined above. May you enjoy building dials, Bill Maddux.
Re: world's largest sundial
Hello happy gnomonists -- fer j. de vries wrote : In France near the coast there is the island Point St Michel with a church on it and the top of that church is used as shadow casting device of a sundial on the beach of France, ( not the beach of the island ). On the beach only some hourpoints on the equinoxline have been constructed, but it is a 'man made' sundial. I think it is a possible winner if only looking to the dimensions, but pitty I can't find the values for these dimensions in all my papers. Somewhere I must have a picture of it. The sundial at the Mont Saint-Michel was designed and set up in 1988. It used the tip of the spire of the top chapel as a gnomon. It was 157 m high. Hours were shown from 9 am to 3 pm by huge roman digits 23 m long. The line itself was about 800 m long. The (very precise) design was limited to the equinox line. Indeed, set up on the shore north of the Mont, it was not supposed to last long : it was the only sundial flooded twice a day by the tide ! (another kind of record for sundials...) Set up during summer 1988 it was removed a few weeks after the fall equinox. The idea was nice indeed. The site was really worth a visit, especially at ebb tide (of course !...). I have kept many documents and pictures about it. Best regards Jean-Paul Cornec e-mail : [EMAIL PROTECTED] 48°44',4 N - 3°27',4W
World's Largest Sundial - yet more!
Fellow Shadow Watchers, Criteria for deciding the World's Largest Sundial? - aside from Bill Maddux' ultimate'biggie' - How about the VOLUME of the minimum-sized imaginary rectilinear 'box' which would contain it? Tony Moss
Re: Worlds Largest Sundial
Dear All, While I live in flatland USA around Chicago, I find the moving shadows of the skyscrapers most interesting as viewed from Navy Pier in the late afternoon. The shadows move so slowly yet they are so very long. But the most awesome sight of shadows for me has got to be from Albuquerque New Mexico at sunrise and sunset. With the Sandia mountains to the east and a 30 mile gentle upward slope to the west, one can watch the shadow of the horizon moving for over 30 minutes. Warren Slawomir K. Grzechnik wrote: At 11:53 AM 2/13/98 -0500, you wrote: Fellow Dialists, Since the question of the World's Largest Dial has been recurrent on the list, might I submit that the largest is an (approximately) spherical dial, a little more than 12,700 kilometers in mean diameter, and is located here. (Wherever you choose to designate here.) Bravo Bill This is the best and biggest Sundial ever made. Slawek - Slawek Grzechnik http://home.earthlink.net/~slawek/ 32 45.5' N, 117 01.4' W
Worlds Largest Sundial
Fellow Dialists, Since the question of the World's Largest Dial has been recurrent on the list, might I submit that the largest is an (approximately) spherical dial, a little more than 12,700 kilometers in mean diameter, and is located here. (Wherever you choose to designate here.) As with smaller spherical dials, there are quite a number of possible arrangements for conveniently reading this dial. Because of its large size, there is sufficient space for multiple gnomons and reading scales, of varied design and construction. As this is also the World's Oldest Dial, details of its precise date of construction and the name of its builder(s) are not readily determined. Attempts to interpret various cryptic or partially effaced markings as date and signature, have not yet led to general consensus on these points. Lest the champions of other claimants for World's Largest argue that this dial should be disqualified as not man made, I submit that while the material World part referred to may not have been made by man, the Dial part is a human conception and construct. As for the rest, other candidate dials are merely rearrangements of material constituents of the larger dial. (I beg the question of whether the candidate dials' sizes should be expanded by approximately 149.6 million kilometers, mean value, to include the illumination source for each of them.) Chris Lusby Taylor wrote: It strikes me that somewhere in the world must be looking for a suitable design for a millennium monument, and the world's largest sundial might be an amusing conceit. I feel that we already have a grand monument to many past millennia. One hopes it will continue to be contemplable by all dialists through many future millennia. Bill Maddux
largest sundial
What is the largest? I don't think you should regard the gnomon as being the criterium, it can be much longer than necessary. I would suggest: the largest actually used sundial face. The larger this face the larger the gnomon will be (in general). The largest I ever saw was in Munich, Germany. It is the inner court of the Deutsches Patentamt, measuring 30x60 meters. The gnomon is a innercorner of the roof located at the 4th (5th?) floor. Thibaud Taudin-Chabot [EMAIL PROTECTED]
