vincentgong7/coordinate-generator

Generate coordinates for circles to cover a given larger circle.

coordinate-generator

This algorithm generates a set of coordinates for building smaller circles to cover a given larger circle. It is typically used in Instagram or Weibo crawling, when the target crawling area is bigger than the one that the API supports.

Usage example:

public static void main(String[] args) {
	//the center of the target circle
	double lat = 30.657938; //the center of the target circle
	double longi = 104.065590;
	
	double R = 11132*4; //the radius of the target circle area, in meters
	double r = 11132; //the radius of the small circle area, in meters
	
	//the parameter for coverage, 0<interval<=r, the smaller interval, the more small circles it will generate, but better coverage, vice versa
	double interval = r; //default = r
	
	//initialize the algorithm
	CoodinatesGenerator cg = new CoodinatesGenerator(lat, longi, R, r,
			interval);
	cg.process();
	
	//the result, a set of coordinates with radius, is delivered by a List<Coordinate>
	List<Coordinate> list = cg.getList();
	cg.iterateList(list); //just print the result
}

Have fun!