Wednesday, 12 September 2012

Draw a path between two Geo Points

Objective:
Draw a line that between two points on Google Maps lets say City “A” and City “B”. Repeat the process to draw a line between City “B” and City “C”.
What we need:
Coordinates of 3 cities or any 3 locations that we want to connect.
  1. Abbottabad : 34159000,73220000
  2. Islamabad : 33695043,73050000
  3. Rawalpindi :33615043, 73050000
I have taken relative coordinates of 3 Pakistani cities starting from Abbottabad (where my family lives), moving to Islamabad (Capital of Pakistan). From Islamabad moving to Rawalpindi.



  • GeoPoint :An immutable class representing a pair of latitude and longitude, stored as integer numbers of microdegrees
  • Projection :A Projection serves to translate between the coordinate system of x/y on-screen pixel coordinates and that of latitude/longitude points on the surface of the earth.
  • Point :Converts the given GeoPoint to onscreen pixel coordinates, relative to the top-left of the MapView that provided this Projection 

    Here is the Screen: 





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