public double CalculateDistace(Position pointOne, Position pointTwo)
{
double A = radian(pointOne.X);
double B = radian(pointOne.Y);
double C = radian(pointTwo.X);
double D = radian(pointTwo.Y);
double dist = 0;
if ((A == C) && (B == D))
{
dist = 0;
}
else
{
if ((Math.Sin(A) * Math.Sin(C)) + (Math.Cos(A) * Math.Cos(C) * Math.Cos(B - D)) > 1)
{
dist = 6367 * Math.Acos(1);
}
else
{
dist = 6367 * Math.Acos((Math.Sin(A) * Math.Sin(C)) + (Math.Cos(A) * Math.Cos(C) * Math.Cos(B - D)));
}
//double conversion = (double)8.0/(double)5.0;
//dist = (dist * conversion);
}
return dist;
}
public string getAddress()
{
try
{
Position PoiX = new Position();
PoiX.X = Lat; PoiX.Y = Lon;
double tempLen = 1000000;
string tempTown = "";
ADODB.Recordset RST = new ADODB.Recordset();
string sqlSTR = "SELECT name,the_geom FROM mergedpoints WHERE the_geom && 'BOX3D(" +
(Lon - 0.5) + " " + (Lat - 0.5) + "," + (Lon + 0.5) + " " + (Lat + 0.5) +
") '::box3d AND distance( the_geom, GeometryFromText( 'POINT(" + Lon + " " + Lat +
")', -1 ) ) < 0.5";
string sqlSTROther = "SELECT name,the_geom FROM mergedpoints WHERE the_geom && 'BOX3D(" +
(Lon - 6) + " " + (Lat - 6) + "," + (Lon + 6) + " " + (Lat + 6) +
") '::box3d AND distance( the_geom, GeometryFromText( 'POINT(" + Lon + " " + Lat +
")', -1 ) ) < 7";
RST.Open(sqlSTR, this.odbcDatabaseConnection, ADODB.CursorTypeEnum.adOpenDynamic,
ADODB.LockTypeEnum.adLockBatchOptimistic, 0);
if (RST.EOF == true)
{
try { RST.Close(); }
catch { }
RST.Open(sqlSTROther, this.odbcDatabaseConnection, ADODB.CursorTypeEnum.adOpenDynamic,
ADODB.LockTypeEnum.adLockBatchOptimistic, 0);
}
if (RST.EOF == false)
{
RST.MoveFirst();
while (RST.EOF == false)
{
string Coord = RST.Fields["the_geom"].Value.ToString();
int Len = Coord.Length;
Coord = Right(Coord, (Len - 14));
Len = Coord.Length;
Coord = Mid(Coord, 0, (Len - 1));
char[] SepChar = { ' ' };
Array coordArray = Coord.Split(SepChar);
double xlon = Convert.ToDouble(coordArray.GetValue(0).ToString());
double xlat = Convert.ToDouble(coordArray.GetValue(1).ToString());
Position PoiY = new Position();
PoiY.X = xlat; PoiY.Y = xlon;
Calculations calc = new Calculations();
double xLen = calc.CalculateDistace(PoiX, PoiY);
//MessageBox.Show(xLen.ToString());
if (xLen < tempLen)
{
tempLen = xLen;
tempTown = RST.Fields["name"].Value.ToString();
}
//PoiY = null;
coordArray = null;
RST.MoveNext();
}
RST.Close();
RST = null;
}
if (tempLen != 1000000)
{
string retVal = Decimal.Round((decimal)tempLen, 3).ToString();
return retVal + "Km From " + tempTown;
}
else
{
return " ";
}
}
catch (System.Exception qw) { return " "; }
}
public string getRoadName()
{
try
{
Position PoiX = new Position();
PoiX.X = Lat; PoiX.Y = Lon;
double tempLen = 1000000;
string tempTown = "";
ADODB.Recordset RST = new ADODB.Recordset();
/* string sqlSTR = "SELECT name,the_geom FROM " + this.roadsTableName +" WHERE the_geom && 'BOX3D(" +
(Lon - 0.1) + " " + (Lat - 0.1) + "," + (Lon + 0.1) + " " + (Lat + 0.1) +
") '::box3d AND distance( the_geom, GeometryFromText( 'POINT(" + Lon + " " + Lat +
")', -1 ) ) < 0.11";
string sqlSTROther = "SELECT name,the_geom FROM " + this.roadsTableName + " WHERE the_geom && 'BOX3D(" +
(Lon - 1) + " " + (Lat - 1) + "," + (Lon + 1) + " " + (Lat + 1) +
") '::box3d AND distance( the_geom, GeometryFromText( 'POINT(" + Lon + " " + Lat +
")', -1 ) ) < 1.1";*/
string sqlSTR = "SELECT rd_name,the_geom FROM kRoads WHERE the_geom && 'BOX3D(" +
(Lon - 0.1) + " " + (Lat - 0.1) + "," + (Lon + 0.1) + " " + (Lat + 0.1) +
") '::box3d AND distance( the_geom, GeometryFromText( 'POINT(" + Lon + " " + Lat +
")', -1 ) ) < 0.11";
string sqlSTROther = "SELECT rd_name,the_geom FROM kRoads WHERE the_geom && 'BOX3D(" +
(Lon - 1) + " " + (Lat - 1) + "," + (Lon + 1) + " " + (Lat + 1) +
") '::box3d AND distance( the_geom, GeometryFromText( 'POINT(" + Lon + " " + Lat +
")', -1 ) ) < 1.1";
RST.Open(sqlSTR, this.odbcDatabaseConnection, ADODB.CursorTypeEnum.adOpenDynamic,
ADODB.LockTypeEnum.adLockBatchOptimistic, 0);
if (RST.EOF == true)
{
try { RST.Close(); }
catch { }
RST.Open(sqlSTROther, this.odbcDatabaseConnection, ADODB.CursorTypeEnum.adOpenDynamic,
ADODB.LockTypeEnum.adLockBatchOptimistic, 0);
}
if (RST.EOF == false)
{
RST.MoveFirst();
while (RST.EOF == false)
{
/*we are no longer dealing with a single point we are
* dealind with a line string*/
string Coord = RST.Fields["the_geom"].Value.ToString();
int Len = Coord.Length;
Coord = Right(Coord, (Len - 25));
Len = Coord.Length;
Coord = Mid(Coord, 0, (Len - 2));
char[] SepChar = { ',' };
Array pointArray = Coord.Split(SepChar);
/*lets loop through the line string*/
for (int p = 0; p < pointArray.Length; p++)
{
try
{
char[] pointSep = { ' ' };
Array coordArray = pointArray.GetValue(p).ToString().Split(pointSep);
double xlon = Convert.ToDouble(coordArray.GetValue(0).ToString());
double xlat = Convert.ToDouble(coordArray.GetValue(1).ToString());
Position PoiY = new Position();
PoiY.X = xlat; PoiY.Y = xlon;
Calculations calc = new Calculations();
double xLen = 10000001;
try { xLen = calc.CalculateDistace(PoiX, PoiY); }
catch { }
calc = null;
//MessageBox.Show(xLen.ToString());
if (xLen < tempLen)
{
tempLen = xLen;
if (tempLen > 0.5)
{ tempTown = " Along Unknown Road"; }
else
{ tempTown = " Along " + RST.Fields["rd_name"].Value.ToString(); }
}
//PoiY = null;
coordArray = null;
//Application.DoEvents();
}
catch { }
}
//Application.DoEvents();
RST.MoveNext();
}
RST.Close();
RST = null;
}
if (tempLen != 1000000)
{
return tempTown;
}
else
{
return " ";
}
}
catch (System.Exception qw) { return " "; }
}
