public NatureEcoIndex(SCLASSAREA _zoneClassArea, List <string> _natIndexName)
{
zoneClassArea = _zoneClassArea;
natIndexName = _natIndexName;
natEcoIndexResult = new List <double>();
natEcoIndexName = new List <string>();
}
public IndexFormula(SCLASSAREA _index)
{
classArea = _index;
}
public SCLASSAREA StatisticClassArea(IFeatureCursor featureCursor)
{
SCLASSAREA ClassArea = new SCLASSAREA();
#region 定义土地覆盖一级类查询条件
Regex FarmLandArea = new Regex("^0(1|2)"); //识别耕地;
Regex ForesLandArea = new Regex("^03"); //识别林地;
Regex GrassLandArea = new Regex("^04"); //识别草地;
Regex HardenSurfArea = new Regex("^0(5|6|7)"); //识别不透水地表;
Regex ConstructionArea = new Regex("^0(5|6|7|8)"); //识别建设用地;
Regex DesertedArea = new Regex("^09"); //识别未利用地;
Regex WaterLandArea = new Regex("^10"); //识别水域湿地;
Regex ProtectLandArea = new Regex("^112(4|5|6|7|8)"); //识别受保护区域;
Regex FloodLandArea = new Regex("^1129"); //识别行、蓄、滞洪区域;
Regex SandFixationLandArea = new Regex("^042(3|4)"); //识别固沙草地、护坡灌草面积;
#endregion
double FarmArea = 0; //耕地面积;
double ForestArea = 0; //林地面积;
double GrassArea = 0; //草地面积;
double HardSurfArea = 0; //不透水地表面积;
double ConstructArea = 0; //建设用地面积;
double DesertArea = 0; //未利用地面积;
double WaterArea = 0; //水域湿地面积;
double ProtectArea = 0; //受保护区域面积;
double FloodArea = 0; //行、蓄、滞洪区域面积;
double SandFixationArea = 0; //固沙草地、护坡灌草面积;
//遍历要素集，读取土地分类面积;
IFeature pFeature = null;
while ((pFeature = featureCursor.NextFeature()) != null)
{
double temparea = (double)pFeature.get_Value(baseData.areaIndex);
string code = pFeature.get_Value(baseData.codeIndex).ToString();
//耕地面积;
if (FarmLandArea.IsMatch(code))
{
FarmArea += temparea;
}
//林地面积;
if (ForesLandArea.IsMatch(code))
{
ForestArea += temparea;
}
//草地面积;
if (GrassLandArea.IsMatch(code))
{
GrassArea += temparea;
}
//水域湿地面积;
if (WaterLandArea.IsMatch(code))
{
WaterArea += temparea;
}
//不透水地表面积;
if (HardenSurfArea.IsMatch(code))
{
HardSurfArea += temparea;
}
//建设用地面积;
if (ConstructionArea.IsMatch(code))
{
ConstructArea += temparea;
}
//荒漠与自然裸露地表面积;
if (DesertedArea.IsMatch(code))
{
DesertArea += temparea;
}
//受保护区域面积;
if (ProtectLandArea.IsMatch(code))
{
ProtectArea += temparea;
}
//行、蓄、滞洪区域面积;
if (FloodLandArea.IsMatch(code))
{
FloodArea += temparea;
}
//固沙草地、护坡灌草面积;
if (SandFixationLandArea.IsMatch(code))
{
SandFixationArea += temparea;
}
}
ClassArea.FarmArea = FarmArea;
ClassArea.ForestArea = ForestArea;
ClassArea.GrassArea = GrassArea;
ClassArea.HardenSurfaceArea = HardSurfArea;
ClassArea.ConstructionArea = ConstructArea;
ClassArea.DesertedArea = DesertArea;
ClassArea.WaterArea = WaterArea;
ClassArea.ProtectArea = ProtectArea;
ClassArea.FloodArea = FloodArea;
ClassArea.SandFixationArea = SandFixationArea;
return(ClassArea);
}
