poLayer->GetLayerDefn());
OGRLinearRing ogrring;
int pNum = 4;
ogrring.setNumPoints(pNum);
ogrring.setPoint...(0, 114.0, 34.0, 0.0);
ogrring.setPoint(1, 115.0, 34.0, 0.0);
ogrring.setPoint(2, 115.0, 35.0, 0.0)...;
ogrring.setPoint(3, 114.0, 35.0, 0.0);
OGRPolygon polygon;
polygon.addRing(&ogrring);
poFeature