Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static double pixelYToLatitude(int pixelY, double zoomLevel, int tileSize) {
        int mapSize = getMapSize(zoomLevel, tileSize);
        if (pixelY < 0 || pixelY > mapSize) {
            throw new IllegalArgumentException(
                    "invalid pixelY coordinate at zoom level " + zoomLevel + ": " + pixelY);
        }
        double y = .5d - ((double) pixelY / mapSize);
        return 90d - 360d * Math.atan(Math.exp(-y * (2d * Math.PI))) / Math.PI;
    }

    public static int getMapSize(double zoomLevel, int tileSize) {
        return (int) Math.pow(2d, getZoomLevelAsInt(zoomLevel)) * getTileSize(zoomLevel, tileSize);
    }

    public static int getZoomLevelAsInt(double zoomLevel) {
        return (int) Math.round(zoomLevel);
    }

    public static int getTileSize(double zoomLevel, int tileSize) {
        double f = zoomLevel - Math.floor(zoomLevel);
        f = f < .5f ? f + 1f : .5f * (f + 1f);
        return (int) (tileSize * f);
    }
}