delphi mapX添加图层，在图层上画图元，并给图元添加位图

  

//显示批量 车辆的位置信息

function TFormMain.ShowCarsPosition: Boolean;
var
  lyr: layer; //层
  fts: feature; //特征
  pt: MapXLib_TLB.point; //点
  mstyle: style; //样式
  str: string; //特征标注
  speed, x, y: double;
  Vehiclelist: TStringList;
  direction, i: Integer;
begin
  Map1.Layers.Remove(1);
  lyr := Map1.Layers.CreateLayer('tempAnimate', EmptyParam, 1, EmptyParam, EmptyParam);
       //在Map1中创建一个Layer
  Map1.Layers.AnimationLayer := lyr; //设为当前层

  lyr.Editable := true; //可编辑
  pt := copoint.Create;
  mstyle := costyle.Create;
    mstyle.SymbolType := miSymbolTypeBitmap;
  mstyle.SymbolBitmapSize := 18;
  mstyle.SymbolBitmapTransparent := True;
  mstyle.SymbolBitmapName := 'car.BMP';
 // mstyle := map1.Layers.item['汽车服务'].AllFeatures.Item[1].Style; //此处获取在层“汽车服务”中存储的特征样式
  lyr.Style := map1.Layers.item['汽车服务'].Style; //层的样式
  lyr.LabelProperties.Style := map1.Layers.item['汽车服务'].LabelProperties.Style; //标签样式
  Vehiclelist := TStringList.Create;
  Vehiclelist := SelectedVehiclelist;
  for i := 0 to Vehiclelist.count - 1 do
  begin
    if DM.ClientDataSet.Locate('VehicleOID', Vehiclelist.Strings[i], []) then
    begin
      x := DM.ClientDataSet.FieldByName('LONGITUDE').AsFloat;
      y := DM.ClientDataSet.FieldByName('LATITUDE').AsFloat;
      str := DM.ClientDataSet.FieldByName('Name').AsString;
      direction := DM.ClientDataSet.FieldByName('direction').AsInteger;
      speed := DM.ClientDataSet.FieldByName('speed').AsFloat;
    end;
    pt.Set_(x, y);
    fts := map1.FeatureFactory.CreateSymbol(pt, mstyle); //创建特征
    fts.KeyValue := str; //标注
    lyr.AddFeature(fts, emptyparam); //将特征添加到层
  end;

  lyr.AutoLabel := true; //自动标注
  lyr.Visible := true; //可见
  lyr.ZoomMin := 0; //缩放范围
  lyr.ZoomMax := 80;
  Map1.CenterX := x;
  Map1.CenterY := y;
end;

mstyle.SymbolType := miSymbolTypeBitmap;
  mstyle.SymbolBitmapSize := 18;
  mstyle.SymbolBitmapTransparent := True;
  mstyle.SymbolBitmapName := 'car.BMP';
 // mstyle := map1.Layers.item['汽车服务'].AllFeatures.Item[1].Style; //此处获取在层“汽车服务”中存储的特征样式
  lyr.Style := map1.Layers.item['汽车服务'].Style; //层的样式
  lyr.LabelProperties.Style := map1.Layers.item['汽车服务'].LabelProperties.Style; //标签样式
  Vehiclelist := TStringList.Create;
  Vehiclelist := SelectedVehiclelist;
  for i := 0 to Vehiclelist.count - 1 do
  begin
    if DM.ClientDataSet.Locate('VehicleOID', Vehiclelist.Strings[i], []) then
    begin
      x := DM.ClientDataSet.FieldByName('LONGITUDE').AsFloat;
      y := DM.ClientDataSet.FieldByName('LATITUDE').AsFloat;
      str := DM.ClientDataSet.FieldByName('Name').AsString;
      direction := DM.ClientDataSet.FieldByName('direction').AsInteger;
      speed := DM.ClientDataSet.FieldByName('speed').AsFloat;
    end;
    pt.Set_(x, y);
    fts := map1.FeatureFactory.CreateSymbol(pt, mstyle); //创建特征
    fts.KeyValue := str; //标注
    lyr.AddFeature(fts, emptyparam); //将特征添加到层
  end;

  lyr.AutoLabel := true; //自动标注
  lyr.Visible := true; //可见
  lyr.ZoomMin := 0; //缩放范围
  lyr.ZoomMax := 80;
  Map1.CenterX := x;
  Map1.CenterY := y;
end;