{"id":5339,"date":"2013-11-24T05:02:22","date_gmt":"2013-11-23T18:02:22","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/wordpress\/?p=5339"},"modified":"2013-11-24T05:02:22","modified_gmt":"2013-11-23T18:02:22","slug":"phpjavascripthtml-great-circle-distance-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/phpjavascripthtml-great-circle-distance-tutorial\/","title":{"rendered":"PHP\/Javascript\/HTML Great Circle Distance Tutorial"},"content":{"rendered":"
\"PHP\/Javascript\/HTML<\/a>

PHP\/Javascript\/HTML Great Circle Distance Tutorial<\/p><\/div>\n

Here is a tutorial that calculates Great Circle Distances on Earth via the entry of Latitude and Longitude. The calculations are not true geodesic calculations and so, we will show the result to the nearest metre. We assume the radius of the Earth is 6371000 metres, but Land Surveyors will tell you this is a pretty simplistic assumption, for the reason that 6371000m could be improved upon, and because the Earth is not a true sphere, and, as is a real issue in the tutorial’s example, no account is taken of the Z co-ordinate, and methinks a walk down from the top of Mt Everest is worth a few metres, and a few beers, maybe?! Of course, if you get into all this, it is a very interesting area, and here<\/a> is a link to a Wikipedia page that may lead you to further research, if you want more detail.<\/p>\n

The Javascript embellishments in this tutorial mainly revolve around:<\/p>\n