Tag Archive 'geoid'

Davening Direction from Alaska

Posted by KosherJava on ‍‍17 Jan 2011 - י״ב שבט תשע״א | Filed under: Zmanim

As mentioned briefly in the “Why Some Zmanim Never Occur” post, the Lubavitch Jewish Center of Anchorage, Alaska has an interesting davening direction question. As explained in the “Bearing to Yerushalayim and Zmanim Map” (additional technical information is available in the “Technical Information about the Bearing to Yerushalayim Map” post), there are two opinions about [...]

Calculating the Bearing/Direction to Har Habayis Using the Zmanim API

Posted by KosherJava on ‍‍29 Nov 2009 - י״ב כסלו תש״ע | Filed under: Software Dev, Zmanim

An earlier “Bearing to Yerushalayim and Zmanim Map” post demonstrated the use of JavaScript to render the bearing to Har Habayis on a Google Map. A more detailed follow-up post “Technical Information about the Bearing to Yerushalayim Map” dealt with detailed technical information on these calculations. The main Bearing to Yerushalayim and Zmanim Map page [...]

Technical Information about the Bearing to Yerushalayim Map

Posted by KosherJava on ‍‍07 Apr 2008 - ב׳ ניסן תשס״ח | Filed under: Software Dev, Zmanim

I have been asked a number of questions recently about the directional accuracy of the Bearing to Yerushalayim and Zmanim Map calculations. The rhumb line calculations are very straight forward and I will not spend much time on it in this article. As a side note, for those interested in the subject, I would like [...]

Bearing to Yerushalayim and Zmanim Map

Posted by KosherJava on ‍‍30 Dec 2007 - כ״א טבת תשס״ח | Filed under: Software Dev, Zmanim

Did you ever find yourself unsure of the correct bearing (direction) to Yerushalayim (Jerusalem)?   The new Zmanim/Bearing to Yerushalayim map will help you find it very easily.  The map draws two lines from your location to Yerushalayim. The blue line uses the commonly used (Levush and others) rhumb line (a straight line on a [...]

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