public void TestGetExtentsHandlesIncorrectValues(string gridRef)
{
BindRunTime();
TranslateGridReference translate = new TranslateGridReference();
Envelope envelope = translate.GetExtents(gridRef);
Assert.IsTrue(envelope == null);
}
public void TestGetExtentsReturnsCorrectValues(string gridRef, double expectedX, double expectedY)
{
BindRunTime();
TranslateGridReference translate = new TranslateGridReference();
Envelope envelope = translate.GetExtents(gridRef);
Assert.IsTrue(envelope.XMin == expectedX);
Assert.IsTrue(envelope.YMin == expectedY);
}
/// <summary>
/// </summary>
/// <param name="queryString">The string to search for, either XXXXXX,YYYYY or with sheet SSXXXXYYYY</param>
/// <returns>An ArcObjects envelope object</returns>
private Envelope DoMatchLookup(string queryString)
{
_log.Debug("BNGLocator DoMatchLookup");
Envelope envelope = null;
string matchText;
string[] parts;
// Removes '," and spaces and split into parts based on a "," delimiter
matchText = queryString.Replace("'", "");
matchText = matchText.Replace("\"", "");
matchText = matchText.TrimStart(' ').TrimEnd(' ');
// Split the search string
parts = matchText.Split(',');
if (parts.Length == 1)
{
parts = matchText.Split(' ');
}
// If there are two parts then it's a co-ordinate X,Y so we construct an
// envelope and return it. If there is one part then we assume it's a
// tile reference e.g. TQ1234 so we call TranslateGridReference to get
// the OS envelope.
if (parts.Length == 2)
{
double xCoordinate;
double yCoordinate;
if ((double.TryParse(parts[0], out xCoordinate) == true) & (double.TryParse(parts[1], out yCoordinate) == true))
{
try
{
envelope = new EnvelopeClass();
envelope.XMin = xCoordinate;
envelope.YMin = yCoordinate;
envelope.XMax = xCoordinate;
envelope.YMax = yCoordinate;
}
catch (Exception)
{
envelope = null;
}
}
}
else
{
TranslateGridReference translate = new TranslateGridReference();
matchText = matchText.Replace(" ", string.Empty);
envelope = translate.GetExtents(matchText);
}
return envelope;
}
/// <summary>
/// Generate an address based on a point.
/// </summary>
/// <param name="location"></param>
/// <param name="returnIntersection"></param>
/// <returns></returns>
public override IPropertySet ReverseGeocode(IPoint location, bool returnIntersection)
{
_log.Debug("IReverseGeocode ReverseGeocode");
string matchText;
IPropertySet reverseGeocodedResult = new PropertySetClass();
Type factoryType = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(factoryType);
var srf = obj as ISpatialReferenceFactory3;
var wgs84GCS = srf.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);
// Sometimes LatLong is incorrectly identified as BNG so it must be checked
if ((location.X > -9 && location.X < 2) && (location.Y > 49 && location.Y < 61))
{
location.SpatialReference = wgs84GCS;
}
// Only supports coords in WGS 84 or BNG
if (location.SpatialReference.Name == "GCS_WGS_1984")
{
#region Project coordinates to BNG accurately
// Create Transformation from WGS84 to OSGB86
var geoTrans = srf.CreateGeoTransformation((int)esriSRGeoTransformationType.esriSRGeoTransformation_OSGB1936_To_WGS1984Petrol) as IGeoTransformation;
ISpatialReference fromSpatialReference;
ISpatialReference toSpatialReference;
geoTrans.GetSpatialReferences(out fromSpatialReference, out toSpatialReference);
// Use correct coord systems to ensure accuracy
var bngPCS = srf.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_BritishNationalGrid);
if ((wgs84GCS.FactoryCode != toSpatialReference.FactoryCode)
|| (bngPCS.GeographicCoordinateSystem.FactoryCode != fromSpatialReference.FactoryCode))
{
throw new Exception("invalid geotransformation");
}
IGeometry5 geometry;
geometry = location as IGeometry5;
geometry.SpatialReference = wgs84GCS;
geometry.ProjectEx(bngPCS, esriTransformDirection.esriTransformReverse, geoTrans, false, 0.0, 0.0);
location = geometry as IPoint;
#endregion
}
else if (location.SpatialReference.Name != "British_National_Grid")
{
// Unaccepted spatial reference, do not process
return reverseGeocodedResult;
}
TranslateGridReference translate = new TranslateGridReference();
// Translate the BNG coords to a British Grid Reference
matchText = translate.GetGridReference(location);
object names = null;
object values = null;
// The values being returned must include a geometry, any extra info fields ("X", "Y", "Addr_type") and at least
// one field with the same name as an input field, "BNG" in this case, to hold the result fields, mathcText in this case
names = new string[] { "Shape", "X Field", "Y Field", "BNG" , "Addr_type", "Match_addr" };
values = new object[] { location, location.X, location.Y, matchText.ToString(), "BNG", matchText.ToString() };
reverseGeocodedResult.SetProperties(names, values);
return reverseGeocodedResult;
}
