public IEnumerable <IFieldable> SpatialGenerate(string fieldName, string shapeWKT,
SpatialSearchStrategy spatialSearchStrategy = SpatialSearchStrategy.GeohashPrefixTree,
int maxTreeLevel = 0, double distanceErrorPct = 0.025)
{
if (string.IsNullOrEmpty(shapeWKT))
{
return(Enumerable.Empty <IFieldable>());
}
if (maxTreeLevel == 0)
{
switch (spatialSearchStrategy)
{
case SpatialSearchStrategy.GeohashPrefixTree:
maxTreeLevel = 9; // about 2 meters, should be good enough (see: http://unterbahn.com/2009/11/metric-dimensions-of-geohash-partitions-at-the-equator/)
break;
case SpatialSearchStrategy.QuadPrefixTree:
maxTreeLevel = 25; // about 1 meter, should be good enough
break;
default:
throw new ArgumentOutOfRangeException("spatialSearchStrategy");
}
}
var strategy = SpatialStrategies.GetOrAdd(fieldName, s => SpatialIndex.CreateStrategy(fieldName, spatialSearchStrategy, maxTreeLevel));
var shape = SpatialIndex.ReadShape(shapeWKT);
return(strategy.CreateIndexableFields(shape)
.Concat(new[] { new Field(Constants.SpatialShapeFieldName, SpatialIndex.WriteShape(shape), Field.Store.YES, Field.Index.NO), }));
}
public IEnumerable <IFieldable> SpatialGenerate(string fieldName, string shapeWKT,
SpatialSearchStrategy spatialSearchStrategy = SpatialSearchStrategy.GeohashPrefixTree,
int maxTreeLevel = 0, double distanceErrorPct = 0.025)
{
if (maxTreeLevel == 0)
{
maxTreeLevel = GeohashPrefixTree.GetMaxLevelsPossible();
}
var strategy = SpatialStrategies.GetOrAdd(fieldName, s => SpatialIndex.CreateStrategy(fieldName, spatialSearchStrategy, maxTreeLevel));
var shape = SpatialIndex.ReadShape(shapeWKT);
return(strategy.CreateIndexableFields(shape)
.Concat(new[] { new Field(Constants.SpatialShapeFieldName, SpatialIndex.WriteShape(shape), Field.Store.YES, Field.Index.NO), }));
}
public IEnumerable <IFieldable> SpatialGenerate(string fieldName, double?lat, double?lng)
{
var strategy = GetStrategyForField(fieldName);
if (lng == null || double.IsNaN(lng.Value))
{
return(Enumerable.Empty <IFieldable>());
}
if (lat == null || double.IsNaN(lat.Value))
{
return(Enumerable.Empty <IFieldable>());
}
Shape shape = SpatialIndex.Context.MakePoint(lng.Value, lat.Value);
return(strategy.CreateIndexableFields(shape)
.Concat(new[] { new Field(Constants.SpatialShapeFieldName, SpatialIndex.WriteShape(shape), Field.Store.YES, Field.Index.NO), }));
}
