52 lines
1.7 KiB
C#
52 lines
1.7 KiB
C#
using System;
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using System.Collections;
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using UnityEngine;
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using Coolape;
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public static class LBSUtl
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{
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//将tile(瓦片)坐标系转换为LatLngt(地理)坐标系，pixelX，pixelY为图片偏移像素坐标
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public static LatLng TileXYToLatLng(int tileX, int tileY, int zoom, int pixelX = 0, int pixelY = 0)
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{
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double size = Math.Pow(2, zoom);
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double pixelXToTileAddition = pixelX / 256.0;
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double lng = (tileX + pixelXToTileAddition) / size * 360.0 - 180.0;
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double pixelYToTileAddition = pixelY / 256.0;
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double lat = Math.Atan(Math.Sinh(Math.PI * (1 - 2 * (tileY + pixelYToTileAddition) / size))) * 180.0 / Math.PI;
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return new LatLng(lng, lat);
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}
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//将LatLngt地理坐标系转换为tile瓦片坐标系，pixelX，pixelY为图片偏移像素坐标
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public static void LatLngToTileXY(LatLng latlng, int zoom, out int tileX, out int tileY, out int pixelX, out int pixelY)
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{
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double size = Math.Pow(2, zoom);
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double x = ((latlng.Longitude + 180) / 360) * size;
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double lat_rad = latlng.Latitude * Math.PI / 180;
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double y = (1 - Math.Log(Math.Tan(lat_rad) + 1 / Math.Cos(lat_rad)) / Math.PI) / 2;
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y = y * size;
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tileX = (int)x;
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tileY = (int)y;
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pixelX = (int)((x - tileX) * 256);
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pixelY = (int)((y - tileY) * 256);
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}
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}
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public class LatLng
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{
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public double Longitude = 0;
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public double Latitude = 0;
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public LatLng(double Longitude, double Latitude)
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{
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this.Longitude = Longitude;
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this.Latitude = Latitude;
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}
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public override string ToString()
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{
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return "Longitude:" + Longitude + ", Latitude:" + Latitude;
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}
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}
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