Hello Damià, Thanks for posting this neat tool for designing simple vertical declining sundials. The concept is excellent and this beta testing will find the little problems.
Like any new program, it takes a bit of playing around to get familiar with the features. If the map resolution does not give an image, it is easy to change the scale of the map to bring up lower resolution images that identify streets if not the walls of buildings. Clicking at two locations on the map gives the line used to define the wall declination. I believe there is a problem with the calculation of wall declination. Look at and measure the line on the map compared to calculation and the ABCD sketch of the building. At my latitude and significant declinations, 30 to 45 degrees, the map and the calculation are quite different, typically 10 degrees. Have you corrected for the shrinkage of the longitude distance with increasing latitude? One minute of latitude is a nautical mile. Assuming a spherical earth, one minute of longitude is a nautical mile x Cos Lat. This is what beta testing is all about. I will test a few more locations and buildings and get back to you off list. Regards, Roger Bailey -------------------------------------------------- From: "Damia Soler" <l...@damia.net> Sent: Sunday, June 21, 2009 8:08 AM To: <sundial@uni-koeln.de> Subject: Build your own Cut Out Paper Vertical Sundial with google maps > Hello sundialers: > > I am proud of announce to you, my personal sundials webpage. > > I think it have some new features never seen before, the aim of > the page is to facilitate the building of vertical paper sundials. > It uses Google Maps, to obtain: > -the longitude > -the latitude > -Wall declination (NEW) > > The you only need to click on the page and it gives to you a > printable PDF, that you only need to cut and fold, and you have a paper > sundial: > > The sundial adjust the time with: > -Daylight Saving Time > -Longitude from you timezone > -Latitude > -Wall declination > > > I am interested to know if the models works for your location, and > any problems you found. > Anyone could check on south hemisphere? > Anyone could compare the wall declination compared with precision > shadow wall declination measure? > > > Please feel free to send me feedback. > > The address is: > > http://sundial.damia.net/ > > > I also am interested if someone could help to translate the page to > other languages (it is designed to be multilingual). > > > Best regards > Damià Soler > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 8.5.374 / Virus Database: 270.12.81/2189 - Release Date: 06/20/09 > 06:15:00 > --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
