/// <summary>
/// 创建3级索引
/// </summary>
/// <param name="featureClassSDO"></param>
public void CreateSpatialIndex(FeatureClassSDO featureClassSDO)
{
if (string.IsNullOrEmpty(this.DataBlockCode) || string.Equals("0", this.DataBlock))
{
LogUtil.Error("不是第一个节点");
throw new ArgumentException("该节点不是第一个节点");
}
Envelope[] envelopes = CreateSubdeEnvelope(featureClassSDO.Envelope);
int featuresCount = featureClassSDO.Features.Count;
Parallel.For(0, featuresCount, (t) =>
{
Feature feature;
featureClassSDO.Features.TryTake(out feature);
for (int i = 0; i < 4; i++)
{
Envelope envelope = envelopes[i];
SpatialIndexNode spatialIndexNode = new SpatialIndexNode(envelope, featureClassSDO.Name,
this.IndexLeve, i, this.ParentCode);
this.Subnode[i] = spatialIndexNode;
if (envelope.Contains(feature.Geometry.EnvelopeInternal))
{
spatialIndexNode.CreateSpatialIndex(feature, envelope);
}
else
{
this.DataBlock.AddFeature(feature);
}
}
});
}
/// <summary>
/// 向下层级创建索引
/// </summary>
/// <param name="feature"></param>
/// <param name="envelope"></param>
private void CreateSpatialIndex(Feature feature, Envelope envelope)
{
Envelope[] envelopes = CreateSubdeEnvelope(envelope);
for (int i = 0; i < 4; i++)
{
Envelope envelopeTemp = envelopes[i];
SpatialIndexNode spatialIndexNode = new SpatialIndexNode(envelope, this.DataBlockName,
this.IndexLeve, i, this.ParentCode);
this.Subnode[i] = spatialIndexNode;
if (envelope.Contains(feature.Geometry.EnvelopeInternal))
{
if (this.DataBlockCode.Length == 4)
{
this.DataBlock.AddFeature(feature);
return;
}
spatialIndexNode.CreateSpatialIndex(feature, envelopeTemp);
return;
}
}
this.DataBlock.AddFeature(feature);
}
