public class Gps_Operation
{
public Catalog cat;
public MapControlModel model;
public MapInfo.Mapping.Map map;
public MapInfo.Data.Table GPSCAR ; //小车表
public MapInfo.Data.Table ORBIT; //轨迹表
public string _findLayerName ; //层名
public string _findColumnName ; //列名
public string MapAlias; //地图别名
public string[] STRX, STRY; //STRX,STRY为存有经纬度值的字符串数组
public Gps_Operation()
{
cat = MapInfo.Engine.Session.Current.Catalog;
GPSCAR = cat.GetTable("Animation");
ORBIT = cat.GetTable("Tm");
_findLayerName = "Animation";
_findColumnName = "GPSid";
model = MapControlModel.GetModelFromSession();
map = model.GetMapObj("Map1");
MapAlias = "Map1";
}
public void real_time_information(string GPS_ID,double x,double y) //GPS实时信息更新
{
GPSCAR.BeginAccess(MapInfo.Data.TableAccessMode.Write);
SearchInfo si = MapInfo.Data.SearchInfoFactory.SearchWhere(_findColumnName + "='" + GPS_ID + "'");
MapInfo.Engine.Session.Current.Selections.DefaultSelection.Clear();
IResultSetFeatureCollection ifs = MapInfo.Engine.Session.Current.Catalog.Search(_findLayerName, si);
foreach (Feature fcar in ifs)
{
double x_old = fcar.Geometry.Centroid.x; //先前坐标
double y_old = fcar.Geometry.Centroid.y;
fcar.Geometry.GetGeometryEditor().OffsetByXY(x - x_old, y - y_old, MapInfo.Geometry.DistanceUnit.Degree, MapInfo.Geometry.DistanceType.Spherical);
fcar.Geometry.EditingComplete(); //更新位置，相对位移
fcar.Update();
}
GPSCAR.EndAccess();
}
public void insert_orbit_feature(double x, double y, double x_sub, double y_sub) //连接前后两个坐标,添加线形图元
{
MapInfo.Geometry.DPoint[] dPt = new DPoint[2]; //创建一个点数组
dPt[0].x = x;
dPt[0].y = y;
dPt[1].x = x - x_sub;
dPt[1].y = y - y_sub;
MultiCurve _lineFeatureCurve = new MultiCurve(map.GetDisplayCoordSys());
_lineFeatureCurve = MultiCurve.CreateLine(map.GetDisplayCoordSys(), dPt[1], dPt[0]); //取两点画线
MapInfo.Styles.SimpleLineStyle slsLine = new MapInfo.Styles.SimpleLineStyle(new LineWidth(3, LineWidthUnit.Pixel), 59, Color.Red);
MapInfo.Styles.CompositeStyle lineStyle = new MapInfo.Styles.CompositeStyle(slsLine);
//创建一个红色箭头的线形图元
Feature Lftr = new Feature(_lineFeatureCurve, lineStyle); //创建图元
ORBIT.InsertFeature(Lftr); //将图元加入临时表中
}
public void gps_locate(string GPS_ID) //定位
{
SearchInfo si;
si = MapInfo.Data.SearchInfoFactory.SearchWhere(_findColumnName + "='" + GPS_ID + "'"); //对应图元
IResultSetFeatureCollection ifs = MapInfo.Engine.Session.Current.Catalog.Search(_findLayerName, si);
MapInfo.Engine.Session.Current.Selections.DefaultSelection.Clear();
if (ifs.Count>0)
if (ifs.Count == 1)
{
map.Center = new DPoint(ifs[0].Geometry.Centroid.x, ifs[0].Geometry.Centroid.y); //定位到小车道地图中间位置
MapInfo.Geometry.Distance d = new MapInfo.Geometry.Distance(0.9, map.Zoom.Unit);
map.Zoom = d;
}
else
{
map.SetView(ifs.Envelope);
}
}
public void history_orbit(string GPS_ID) //构造行车轨迹
{
for (int i = 1; i < STRX.Length - 1; i++)
if (GPSCAR != null)
{
//更新点的位置
GPSCAR.BeginAccess(MapInfo.Data.TableAccessMode.Write);
SearchInfo si = MapInfo.Data.SearchInfoFactory.SearchWhere(_findColumnName + "='" + GPS_ID + "'");
MapInfo.Engine.Session.Current.Selections.DefaultSelection.Clear();
IResultSetFeatureCollection ifs = MapInfo.Engine.Session.Current.Catalog.Search(_findLayerName, si);
double x = Convert.ToDouble(STRX[i]);
double y = Convert.ToDouble(STRY[i]);
foreach (Feature fcar in ifs)
{
double x_old = fcar.Geometry.Centroid.x; //先前坐标
double y_old = fcar.Geometry.Centroid.y;
fcar.Geometry.GetGeometryEditor().OffsetByXY(x - x_old, y - y_old, MapInfo.Geometry.DistanceUnit.Degree, MapInfo.Geometry.DistanceType.Spherical);
fcar.Geometry.EditingComplete(); //更新位置，相对位移
fcar.Update();
gps_locate(GPS_ID); //定位
double subx = x - x_old;
double suby = y - y_old;
insert_orbit_feature(fcar.Geometry.Centroid.x, fcar.Geometry.Centroid.y, subx, suby);//连接前后两个坐标，以便构造轨迹
}
GPSCAR.EndAccess();
}
}
}