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Driving Range Polygon Draw Current Location in the Map provider. In appendix B are described all permissions needed to be declared in the manifest file for the running the algorithm. 5.2 Draw Current Location in the Map From the location listener, there is obtained, among other information, the current location defined as an object with longitude and latitude attributes. These values will be applied to display current location. Google API offers us to use Marker object to show location on the map. With following code we draw new Marker of current location to Google Maps: @Override public void onMapReady(GoogleMap map) { map.addMarker(new MarkerOptions() . position (new LatLng( latitudeValue , longitudeValue )) . title (”Current location ”)); } The text ”Current location” is an info window when clicked on the Marker. There could be added additional options to the marker such as color, shape etc. 5.3 Approaches How to Get Distance For purpose of a driving range polygon algorithm, there is a need to get a great-distance between two geographical points. This distance is a starting point and it will be next improved with iteration algorithm approach to get the more accurate distance between two points. It will be used also for displaying driving range distance as a circle. This distance can be obtained with a few approaches. There will be described two similar functions to get this distance without using Google APIs. 5.3.1 Great-Circle Distance For long distances can be used a simple great-circle equation known also as orthodromic distance. This approach simplifies the model of the earth and supposes that the Earth is a perfect sphere. 11PDF Image | Driving Range Estimation and Trajectory Planning
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