geolocation - GPS ground coverage -

here idea track sprayer coverage on farm android app.

1. use get??location provide gps coordinates
2. use coordinates plug polyline maps api v2
3. set polyline width according boom width. (conversion require pixel distance conversion @ different zoom levels.

how display ground coverage polyline if footage on map change zoom level? correct me if i'm wrong, polyline uses pixels defined width. idea require user input width of sprayer in feet , program have calculate polyline width based on zoom/pixel ratio.

you should not draw poly line, because spray path forms closed polygon.
must draw polygon line width = 0 (or minimum line width);
fill polygon.

for such precision farming usuallay better gps devices used centimeter accuracy. (using rtk)