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SAApps Aspiring developer Posts: 4 Reg: Aug 27, 2012 Durban 1,690	confirm \| cancel 09/10/12 10:07 AM (13 years ago) Measure it is it possible to use the gps on the phone to measure a distance with a start and end button? Title Comments is it possible to use the gps on the phone to measure a distance with a start and end button?

GoNorthWest buzztouch Evangelist Posts: 8197 Reg: Jun 24, 2011 Oro Valley, AZ 1,000,000	09/10/12 10:45 AM (13 years ago) Yep! You could have a 'Start' button that captures the starting lat/long, and a 'End' button that captures the ending lat/long, and use an equation to calculate the straight line distance. Google can probably spit out that equation pretty quickly. If, however, you wanted to capture the distance along a route...that would be a bit more difficult, and probably requires capturing a set of points, calculating the distance between each, and then adding them up. The accuracy would depend on the number of points you capture. I'd Google for the basic algorithms needed for this. But it's very easy to get your device to report its current location and have that stored in a database or something. Here's a forum discussion to get you going: http://www.buzztouch.com/forum/thread.php?tid=6A0E0F30B5413FF704B3A04 Hope this helps! Mark Comments Yep! You could have a 'Start' button that captures the starting lat/long, and a 'End' button that captures the ending lat/long, and use an equation to calculate the straight line distance. Google can probably spit out that equation pretty quickly. If, however, you wanted to capture the distance along a route...that would be a bit more difficult, and probably requires capturing a set of points, calculating the distance between each, and then adding them up. The accuracy would depend on the number of points you capture. I'd Google for the basic algorithms needed for this. But it's very easy to get your device to report its current location and have that stored in a database or something. Here's a forum discussion to get you going: http://www.buzztouch.com/forum/thread.php?tid=6A0E0F30B5413FF704B3A04 Hope this helps! Mark

GoNorthWest buzztouch Evangelist Posts: 8197 Reg: Jun 24, 2011 Oro Valley, AZ 1,000,000	09/10/12 10:46 AM (13 years ago) Distance between two points: http://www.movable-type.co.uk/scripts/latlong.html Mark Comments Distance between two points: http://www.movable-type.co.uk/scripts/latlong.html Mark

GoNorthWest buzztouch Evangelist Posts: 8197 Reg: Jun 24, 2011 Oro Valley, AZ 1,000,000	09/10/12 11:49 AM (13 years ago) Distance along a path: http://gis.stackexchange.com/questions/19369/total-great-circle-distance-along-a-path-of-points-postgis Mark Comments Distance along a path: http://gis.stackexchange.com/questions/19369/total-great-circle-distance-along-a-path-of-points-postgis Mark

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