internal void FullExtent()
{
if (myMap.LayerNum != 0)
{
MyRectangle mbr = myMap.GetMBR();
centerLngLat = new PointF(((float)mbr.MaxX + (float)mbr.MinX) * 0.5F, ((float)mbr.MaxY + (float)mbr.MinY) * 0.5F);
double x = ETCProjection.Longitude2X(mbr.MaxX) - ETCProjection.Longitude2X(mbr.MinX);
double y = ETCProjection.Latitude2Y(mbr.MaxY) - ETCProjection.Latitude2Y(mbr.MinY);
double scale1 = x / Width;
double scale2 = y / Height;
Ratio = Math.Max(scale1, scale2);
scaleIndex = maxZoomLevel;
UpdateMapImg();
}
}
/// <summary>
/// 绘制栅格数据
/// </summary>
/// <param name="g"></param>
/// <param name="bounds"></param>
/// <param name="centerPos"></param>
/// <param name="scale"></param>
internal void DrawSpaceData(Graphics g, Rectangle bounds, PointF centerPos, double scale)
{
double x1 = ETCProjection.Longitude2X(minX);
double x2 = ETCProjection.Longitude2X(maxX);
double y1 = ETCProjection.Latitude2Y(minY);
double y2 = ETCProjection.Latitude2Y(maxY);
double width = (x2 - x1) / scale;
double height = (y2 - y1) / scale;
PointF centerXY = ETCProjection.LngLat2XY(centerPos);
float dx = (centerXY.X - (float)x1) / (float)scale;
float dy = (centerXY.Y - (float)y2) / (float)scale;
RectangleF boundary = new RectangleF((float)bounds.Width * 0.5F - dx, (float)bounds.Height * 0.5F + dy, (float)width, (float)height);
g.DrawImage(mapBmp, boundary);
}
/// <summary>
/// 增加Shapefile图层
/// </summary>
/// <param name="shp"></param>
internal void AddLayer(Shapefile shp)
{
myMap.AddLayer(new MyLayer(shp));
TreeNode layerNode = new TreeNode(shp.Name, 2, 2);
layerNode.Checked = true;
centerLngLat = shp.CenterPos;
centerXY = ETCProjection.LngLat2XY(centerLngLat); //同步更新屏幕中心点投影坐标系坐标
treeViewLayers.Nodes[0].Nodes.Insert(0, layerNode);
treeViewLayers.ExpandAll();
double x = ETCProjection.Longitude2X(shp.Xmax) - ETCProjection.Longitude2X(shp.Xmin);
double y = ETCProjection.Latitude2Y(shp.Ymax) - ETCProjection.Latitude2Y(shp.Ymin);
double scale1 = x / Width;
double scale2 = y / Height;
Ratio = Math.Max(scale1, scale2);
scaleIndex = maxZoomLevel;
UpdateMapImg();
}
/// <summary>
/// 增加栅格图层
/// </summary>
/// <param name="grid"></param>
internal void AddLayer(MyGrid grid)
{
myMap.AddLayer(new MyLayer(grid));
TreeNode layerNode = new TreeNode(grid.Name, 2, 2);
layerNode.Checked = true;
treeViewLayers.Nodes[0].Nodes.Insert(0, layerNode);
treeViewLayers.ExpandAll();
centerLngLat = new PointF(((float)grid.MaxX + (float)grid.MinX) * 0.5F, ((float)grid.MaxY + (float)grid.MinY) * 0.5F);
centerXY = ETCProjection.LngLat2XY(centerLngLat); //同步更新屏幕中心点投影坐标系坐标
double x = ETCProjection.Longitude2X(grid.MaxX) - ETCProjection.Longitude2X(grid.MinX);
double y = ETCProjection.Latitude2Y(grid.MaxY) - ETCProjection.Latitude2Y(grid.MinY);
double scale1 = x / Width;
double scale2 = y / Height;
Ratio = Math.Max(scale1, scale2);
scaleIndex = maxZoomLevel;
UpdateMapImg();
}