public static IShape MakeShapeFromString(SpatialStrategy strategy, string name, string shapeStr)
{
if (shapeStr != null && shapeStr.Length > 0)
{
try
{
return(strategy.SpatialContext.ReadShapeFromWkt(shapeStr));
}
catch (Exception e)
{//InvalidShapeException TODO
Console.Error.WriteLine("Shape " + name + " wasn't parseable: " + e + " (skipping it)");
return(null);
}
}
return(null);
}
public Query MakeQuery(Query existingQuery, SpatialStrategy spatialStrategy, string shapeWKT, SpatialRelation relation,
double distanceErrorPct = 0.025, SpatialUnits?unitOverride = null)
{
SpatialOperation spatialOperation;
var shape = ReadShape(shapeWKT, unitOverride);
switch (relation)
{
case SpatialRelation.Within:
spatialOperation = SpatialOperation.IsWithin;
break;
case SpatialRelation.Contains:
spatialOperation = SpatialOperation.Contains;
break;
case SpatialRelation.Disjoint:
spatialOperation = SpatialOperation.IsDisjointTo;
break;
case SpatialRelation.Intersects:
spatialOperation = SpatialOperation.Intersects;
break;
case SpatialRelation.Nearby:
// only sort by this, do not filter
return(new FunctionQuery(spatialStrategy.MakeDistanceValueSource(shape.GetCenter())));
default:
throw new ArgumentOutOfRangeException("relation");
}
var args = new SpatialArgs(spatialOperation, shape)
{
DistErrPct = distanceErrorPct
};
if (existingQuery is MatchAllDocsQuery)
{
return(new CustomScoreQuery(spatialStrategy.MakeQuery(args), new ValueSourceQuery(spatialStrategy.MakeRecipDistanceValueSource(shape))));
}
return(spatialStrategy.MakeQuery(args));
}
public static Query MakeQuery(SpatialStrategy spatialStrategy, string shapeWKT, SpatialRelation relation,
double distanceErrorPct = 0.025)
{
SpatialOperation spatialOperation;
Shape shape = ShapeReadWriter.ReadShape(shapeWKT);
switch (relation)
{
case SpatialRelation.Within:
spatialOperation = SpatialOperation.IsWithin;
break;
case SpatialRelation.Contains:
spatialOperation = SpatialOperation.Contains;
break;
case SpatialRelation.Disjoint:
spatialOperation = SpatialOperation.IsDisjointTo;
break;
case SpatialRelation.Intersects:
spatialOperation = SpatialOperation.Intersects;
break;
case SpatialRelation.Nearby:
var nearbyArgs = new SpatialArgs(SpatialOperation.IsWithin, shape);
nearbyArgs.SetDistPrecision(distanceErrorPct);
// only sort by this, do not filter
return(new FunctionQuery(spatialStrategy.MakeValueSource(nearbyArgs)));
default:
throw new ArgumentOutOfRangeException("relation");
}
var args = new SpatialArgs(spatialOperation, shape);
args.SetDistPrecision(distanceErrorPct);
return(spatialStrategy.MakeQuery(args));
}
static void Main(string[] args)
{
int maxLength = GeohashPrefixTree.GetMaxLevelsPossible();
strategy = new RecursivePrefixTreeStrategy(
new GeohashPrefixTree(context, maxLength));
var dir = new RAMDirectory();
var writer = new IndexWriter(dir, new SimpleAnalyzer(), true,
IndexWriter.MaxFieldLength.UNLIMITED);
AddPoint(writer, "London", -81.233040, 42.983390);
AddPoint(writer, "East New York", -73.882360, 40.666770);
AddPoint(writer, "Manhattan", -73.966250, 40.783430);
AddPoint(writer, "New York City", -74.005970, 40.714270);
AddPoint(writer, "Oslo", 10.746090, 59.912730);
AddPoint(writer, "Bergen", 5.324150, 60.392990);
AddPoint(writer, "Washington, D. C.", -77.036370, 38.895110);
writer.Close();
// Origin point - Oslo Spektrum
const double lat = 59.9138688;
const double lng = 10.752245399999993;
const double radius = 600;
var query = strategy.MakeQuery(new SpatialArgs(SpatialOperation.IsWithin,
context.MakeCircle(lng, lat, radius)), fieldInfo);
var searcher = new IndexSearcher(dir);
var results = searcher.Search(query, null, 100);
foreach (var topDoc in results.ScoreDocs)
{
var name = searcher.Doc(topDoc.doc).Get("Name");
Console.WriteLine(name);
}
searcher.Close();
dir.Close();
}
public static Query MakeQuery(SpatialStrategy spatialStrategy, string shapeWKT, SpatialRelation relation,
double distanceErrorPct = 0.025)
{
SpatialOperation spatialOperation;
var shape = ReadShape(shapeWKT);
switch (relation)
{
case SpatialRelation.Within:
spatialOperation = SpatialOperation.IsWithin;
break;
case SpatialRelation.Contains:
spatialOperation = SpatialOperation.Contains;
break;
case SpatialRelation.Disjoint:
spatialOperation = SpatialOperation.IsDisjointTo;
break;
case SpatialRelation.Intersects:
spatialOperation = SpatialOperation.Intersects;
break;
case SpatialRelation.Nearby:
// only sort by this, do not filter
return(new FunctionQuery(spatialStrategy.MakeDistanceValueSource(shape.GetCenter())));
default:
throw new ArgumentOutOfRangeException("relation");
}
var args = new SpatialArgs(spatialOperation, shape)
{
DistErrPct = distanceErrorPct
};
return(spatialStrategy.MakeQuery(args));
}
public static IEnumerable <Document> CreateSearchDocuments(IList <Deal> deals, SpatialStrategy strategy)
{
var docs = new List <Document>(deals.Count());
var ctx = strategy.GetSpatialContext();
foreach (var deal in deals)
{
foreach (var location in deal.Locations)
{
var doc = new Document();
doc.Add(new Field(TitleFieldName, deal.Title, Field.Store.YES, Field.Index.ANALYZED));
doc.Add(new Field(SupplierFieldName, deal.Supplier, Field.Store.YES, Field.Index.NOT_ANALYZED));
doc.Add(new Field(LocationNameFieldName, location.Name, Field.Store.YES, Field.Index.NOT_ANALYZED));
foreach (var f in strategy.CreateIndexableFields(ctx.MakePoint(location.Latitude, location.Longitude)))
{
doc.Add(f);
}
docs.Add(doc);
}
}
return(docs);
}
public Param(SpatialStrategy strategy)
{
this.strategy = strategy;
}
public Query MakeQuery(Query existingQuery, SpatialStrategy spatialStrategy, SpatialIndexQuery spatialQuery)
{
return(MakeQuery(existingQuery, spatialStrategy, spatialQuery.QueryShape, spatialQuery.SpatialRelation, spatialQuery.DistanceErrorPercentage, spatialQuery.RadiusUnitOverride));
}
/// <summary>
/// Sets Spatial Searching for Points
/// </summary>
/// <param name="locationField"></param>
internal void SetPointVectorStrategy(string locationField)
{
spatialContext = SpatialContext.GEO;
spatialStrategy = new PointVectorStrategy(spatialContext, locationField);
}
static SpatialIndex()
{
maxLength = GeohashPrefixTree.GetMaxLevelsPossible();
fieldInfo = new SimpleSpatialFieldInfo(Constants.SpatialFieldName);
strategy = new RecursivePrefixTreeStrategy(new GeohashPrefixTree(RavenSpatialContext, maxLength));
}
private void Indexer_DocumentWriting(LuceneEngine.DocumentWritingEventArgs e, SpatialContext ctx, SpatialStrategy strategy)
{
double lat = double.Parse(e.ValueSet.Values["lat"].First().ToString());
double lng = double.Parse(e.ValueSet.Values["lng"].First().ToString());
GetXYFromCoords(lat, lng, out var x, out var y);
Shape geoPoint = ctx.MakePoint(x, y);
foreach (AbstractField field in strategy.CreateIndexableFields(geoPoint))
{
e.Document.Add(field);
}
}
