/// <summary>
/// 获取地图切片信息
/// </summary>
/// <param name="extent"></param>
/// <param name="zoom">地图级别</param>
/// <returns>切信息，切片行列号起止信息</returns>
public TitlesInfo getTitlesInfo(Extent extent, int zoom)
{
TitlesInfo titleInfos = new TitlesInfo();
titleInfos.minRow = (int)Math.Floor((extent.minX + maxExtent) / (maxResolution / (Math.Pow(2, zoom)) * 256.0));
titleInfos.maxRow = (int)Math.Ceiling((extent.maxX + maxExtent) / (maxResolution / (Math.Pow(2, zoom)) * 256.0));
titleInfos.minCol = (int)Math.Floor((maxExtent - extent.maxY) / (maxResolution / (Math.Pow(2, zoom)) * 256.0));
titleInfos.maxCol = (int)Math.Ceiling((maxExtent - extent.minY) / (maxResolution / (Math.Pow(2, zoom)) * 256.0));
return(titleInfos);
}
/// <summary>
/// 获取地图切片信息
/// </summary>
/// <param name="extent">区域</param>
/// <param name="zoom"></param>
/// <returns>切片范围信息</returns>
public TitlesInfo GetTitlesInfo(Extent extent, int zoom)
{
TitlesInfo titleInfo = new TitlesInfo();
double resolution = Math.Pow(2, 18 - zoom);
titleInfo.minRow = (int)(Math.Round((extent.minX - 0) / (resolution * 256)));
titleInfo.minCol = (int)(Math.Round((extent.minY - 23000) / (resolution * 256)));
titleInfo.maxRow = (int)(Math.Round((extent.maxX - 0) / (resolution * 256)));
titleInfo.maxCol = (int)(Math.Round((extent.maxY - 23000) / (resolution * 256)));
return(titleInfo);
}
/// <summary>
/// 获取地图切片信息
/// </summary>
/// <param name="extent">区域</param>
/// <returns>切片范围信息</returns>
public TitlesInfo getTitlesInfo(Extent extent, int zoom)
{
double resolution = this.resolutions[zoom];
TitlesInfo titleInfo = new TitlesInfo();
titleInfo.minRow = (int)(Math.Floor((extent.minX + maxExtent) / (resolution * 256)));
titleInfo.maxCol = (int)(Math.Ceiling((maxExtent - extent.minY) / (resolution * 256)));
titleInfo.maxRow = (int)(Math.Ceiling((extent.maxX + maxExtent) / (resolution * 256)));
titleInfo.minCol = (int)(Math.Floor((maxExtent - extent.maxY) / (resolution * 256)));
return(titleInfo);
}
