OGR读取Oracle Spatial数据

#include "ogrsf_frmts.h"

int main()
{
	OGRRegisterAll();

	OGRDataSource	*pogrDataSource = NULL;
	OGRLayer	*pogrLayer = NULL;
	OGRFeature	*pogrFeature = NULL;
	OGRGeometry	*pogrGeometry = NULL;
	OGRFeatureDefn	*pogrFeatureDefn = NULL;
	OGRFieldDefn	*pogrFieldDefn = NULL;
	
	//const char* uri = "/home/hawk/data/gis/beijing/beijing_Pt.shp";
	//const char* uri  = "PG:dbname='GBSDE' host='127.0.0.1' port='5432' user='GBSDE' password='GBSDE'";
	const char* uri  = "OCI:GBSDE/GBSDE@oradb8";
	const char* szLayerName = "CITIES";
	
	pogrDataSource = OGRSFDriverRegistrar::Open(uri,FALSE);
	if(pogrDataSource==NULL)
	{
		printf("open failed.\n");
		exit(1);
	}

	pogrLayer = pogrDataSource->GetLayerByName(szLayerName);
	pogrLayer->ResetReading();
	
	while((pogrFeature=pogrLayer->GetNextFeature())!=NULL)
	{
		pogrFeatureDefn = pogrLayer->GetLayerDefn();
		for(int i=0; i<pogrFeatureDefn->GetFieldCount(); i++)
		{
			pogrFieldDefn = pogrFeatureDefn->GetFieldDefn(i);
		}
		pogrGeometry = pogrFeature->GetGeometryRef();
		if(pogrGeometry!=NULL)
		{
			printf("%s\n", pogrGeometry->exportToKML());
		}
		
		OGRFeature::DestroyFeature(pogrFeature);
	}
	
	OGRDataSource::DestroyDataSource(pogrDataSource);
}