public TopoObject Build()
{
TopoObject obj;
switch (_type)
{
case "Point":
obj = new TopoPoint(_type, _coordinates);
break;
case "LineString":
obj = new TopoLineString(_type, _arcs);
break;
case "Polygon":
obj = new TopoPolygon(_type, _arcs);
break;
case "MultiPoint":
obj = new TopoMultiPoint(_type, _coordinates);
break;
case "MultiLineString":
obj = new TopoMultiLineString(_type, _arcs);
break;
case "MultiPolygon":
obj = new TopoMultiPolygon(_type, _arcs);
break;
case "GeometryCollection":
obj = new TopoCollection(_type, _geometries);
break;
default:
throw new ArgumentOutOfRangeException("unhandled type: " + _type);
}
obj.Id = _id;
obj.Properties = _properties;
return(obj);
}
public FeatureCollection Create(TopoObject data)
{
if (data == null)
{
throw new ArgumentNullException("data");
}
string type = data.Type;
if (String.IsNullOrEmpty(type))
{
throw new ArgumentException("type undefined", "data");
}
if (String.Equals("GeometryCollection", type))
{
// a TopoJSON "GeometryCollection" actually is an IFeature array
// so we handle this stuff as a special case
TopoCollection coll = (TopoCollection)data;
return(CreateCollection(coll.Geometries));
}
IGeometry geometry;
switch (type)
{
case "Point":
TopoPoint point = (TopoPoint)data;
geometry = CreatePoint(point.Coordinates);
break;
case "MultiPoint":
TopoMultiPoint mpoint = (TopoMultiPoint)data;
geometry = CreateMultiPoint(mpoint.Coordinates);
break;
case "LineString":
TopoLineString lstring = (TopoLineString)data;
geometry = CreateLineString(lstring.Arcs);
break;
case "MultiLineString":
TopoMultiLineString mlstring = (TopoMultiLineString)data;
geometry = CreateMultiLineString(mlstring.Arcs);
break;
case "Polygon":
TopoPolygon poly = (TopoPolygon)data;
geometry = CreatePolygon(poly.Arcs);
break;
case "MultiPolygon":
TopoMultiPolygon mpoly = (TopoMultiPolygon)data;
geometry = CreateMultiPolygon(mpoly.Arcs);
break;
default:
string s = string.Format("type unsupported: {0}", type);
throw new NotSupportedException(s);
}
IAttributesTable properties = data.Properties;
Feature feature = new Feature(geometry, properties);
Collection <IFeature> collection = new Collection <IFeature> {
feature
};
return(new FeatureCollection(collection));
}