/*!
* 功能 计算路面声压级并离散
* 参数 sourcePath源文件路径
* resultPath 结果文件路径
* splitLength 分割长度
* timeType 计算时段
* 返回值 路面声压级
* 版本号 1.0
* 作者 樊晓剑
* 创建时间 2016年7月12日
* 修改时间
*/
public Layer getSource(Layer sourceLayer, Layer resultLayer, float splitLength, String timeType, int frequency)
{
LineSourcePartition bean = new LineSourcePartition();
FeatureDefn resultDefn = sourceLayer.GetLayerDefn(); //字段名
Feature resultFeature = null; //循环获取要素
Geometry roadPoint = null; //离散节点
double height = 0; //高度
double LW = 0; //声功率级
while ((resultFeature = sourceLayer.GetNextFeature()) != null)
{
//根据所选要素获取相关属性
height = resultFeature.GetFieldAsDouble("HEIGHT_G");
LW = getRoadLW(resultFeature, timeType); //计算道路声功率级
Queue <Geometry> LineSource = bean.staticPartition(10, resultFeature.GetGeometryRef()); //公路声源离散
//离散结果生成新的图层
while (LineSource.Count > 0)
{
roadPoint = LineSource.Dequeue();
Feature feature = new Feature(resultDefn);
feature.SetGeometry(roadPoint.Centroid());
feature.SetField("HEIGHT_G", height);
feature.SetField("PWLs", SourceStrength.getLineSource(LW, roadPoint.Length())); //离散后声功率级
feature.SetField("FREQUENCY", frequency); //频率
resultLayer.CreateFeature(feature);
}
}
return(resultLayer);
}