當前位置: 首頁>>代碼示例>>C++>>正文

C++ GetLayerDefn函數代碼示例

本文整理匯總了C++中GetLayerDefn函數的典型用法代碼示例。如果您正苦於以下問題：C++ GetLayerDefn函數的具體用法？C++ GetLayerDefn怎麽用？C++ GetLayerDefn使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。


在下文中一共展示了GetLayerDefn函數的15個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C++代碼示例。

示例1: CPLSetThreadLocalConfigOption

void OGRILI1Layer::JoinGeomLayers()
{
    bGeomsJoined = TRUE;
    int bResetConfigOption = FALSE;
    if (EQUAL(CPLGetConfigOption("OGR_ARC_STEPSIZE", ""), ""))
    {
        bResetConfigOption = TRUE;
        CPLSetThreadLocalConfigOption("OGR_ARC_STEPSIZE", "0.96");
    }

    for (GeomFieldInfos::const_iterator it = oGeomFieldInfos.begin(); it != oGeomFieldInfos.end(); ++it)
    {
        OGRFeatureDefn* geomFeatureDefn = it->second.geomTable;
        if (geomFeatureDefn)
        {
            CPLDebug( "OGR_ILI", "Join geometry table %s of field '%s'", geomFeatureDefn->GetName(), it->first.c_str() );
            OGRILI1Layer* poGeomLayer = poDS->GetLayerByName(geomFeatureDefn->GetName());
            int nGeomFieldIndex = GetLayerDefn()->GetGeomFieldIndex(it->first.c_str());
            if (it->second.iliGeomType == "Surface")
            {
                JoinSurfaceLayer(poGeomLayer, nGeomFieldIndex);
            }
            else if (it->second.iliGeomType == "Area")
            {
                CPLString pointField = it->first + "__Point";
                int nPointFieldIndex = GetLayerDefn()->GetGeomFieldIndex(pointField.c_str());
                PolygonizeAreaLayer(poGeomLayer, nGeomFieldIndex, nPointFieldIndex);
            }
        }
    }

    if( bResetConfigOption )
        CPLSetThreadLocalConfigOption("OGR_ARC_STEPSIZE", NULL);
}
開發者ID:garnertb，項目名稱:gdal，代碼行數:34，代碼來源:ogrili1layer.cpp

示例2: CPLDebug

void OGRILI1Layer::JoinSurfaceLayer( OGRILI1Layer* poSurfaceLineLayer, int nSurfaceFieldIndex )
{
    CPLDebug( "OGR_ILI", "Joining surface layer %s with geometries", GetLayerDefn()->GetName());
    OGRwkbGeometryType geomType = GetLayerDefn()->GetGeomFieldDefn(nSurfaceFieldIndex)->GetType();
    poSurfaceLineLayer->ResetReading();
    while (OGRFeature *linefeature = poSurfaceLineLayer->GetNextFeatureRef()) {
        //OBJE entries with same _RefTID are polygon rings of same feature
        //TODO: non-numeric _RefTID/FID is not supported yet!
        GIntBig reftid = linefeature->GetFieldAsInteger64(1); //_RefTID
        OGRFeature *feature = GetFeatureRef((int)reftid);
        if (feature) {
            OGRCurvePolygon *poly;
            if (feature->GetGeomFieldRef(nSurfaceFieldIndex)) {
                CPLDebug( "OGR_ILI", "Adding ring to FID " CPL_FRMT_GIB, reftid );
                poly = (OGRCurvePolygon *)feature->GetGeomFieldRef(nSurfaceFieldIndex);
            } else {
                poly = (geomType == wkbPolygon) ? new OGRPolygon() : new OGRCurvePolygon();
                feature->SetGeomFieldDirectly(nSurfaceFieldIndex, poly);
            }
            OGRMultiCurve *lines = (OGRMultiCurve*)linefeature->GetGeomFieldRef(0);
            for( int i = 0; i < lines->getNumGeometries(); i++ ) {
                OGRCurve *line = (OGRCurve*)lines->getGeometryRef(i);
                OGRCurve *ring = (geomType == wkbPolygon) ?
                                 OGRCurve::CastToLinearRing((OGRCurve*)line->clone()) :
                                 (OGRCurve*)line->clone();
                poly->addRingDirectly(ring);
            }
        } else {
            CPLError(CE_Warning, CPLE_AppDefined, "Couldn't join feature FID " CPL_FRMT_GIB, reftid );
        }
    }

    ResetReading();
    poSurfaceLineLayer = 0;
}
開發者ID:garnertb，項目名稱:gdal，代碼行數:35，代碼來源:ogrili1layer.cpp

示例3: GetLayerDefn

void OGRPGResultLayer::SetSpatialFilter( int iGeomField, OGRGeometry * poGeomIn )

{
    if( iGeomField < 0 || iGeomField >= GetLayerDefn()->GetGeomFieldCount() ||
        GetLayerDefn()->GetGeomFieldDefn(iGeomField)->GetType() == wkbNone )
    {
        if( iGeomField != 0 )
        {
            CPLError(CE_Failure, CPLE_AppDefined,
                     "Invalid geometry field index : %d", iGeomField);
        }
        return;
    }
    m_iGeomFieldFilter = iGeomField;

    OGRPGGeomFieldDefn* poGeomFieldDefn =
        poFeatureDefn->myGetGeomFieldDefn(m_iGeomFieldFilter);
    if( InstallFilter( poGeomIn ) )
    {
        if ( poGeomFieldDefn->ePostgisType == GEOM_TYPE_GEOMETRY ||
             poGeomFieldDefn->ePostgisType == GEOM_TYPE_GEOGRAPHY )
        {
            if( m_poFilterGeom != NULL)
            {
                char szBox3D_1[128];
                char szBox3D_2[128];
                OGREnvelope  sEnvelope;

                m_poFilterGeom->getEnvelope( &sEnvelope );
                if( poGeomFieldDefn->ePostgisType == GEOM_TYPE_GEOGRAPHY )
                {
                    if( sEnvelope.MinX < -180.0 )
                        sEnvelope.MinX = -180.0;
                    if( sEnvelope.MinY < -90.0 )
                        sEnvelope.MinY = -90.0;
                    if( sEnvelope.MaxX > 180.0 )
                        sEnvelope.MaxX = 180.0;
                    if( sEnvelope.MaxY > 90.0 )
                        sEnvelope.MaxY = 90.0;
                }
                CPLsnprintf(szBox3D_1, sizeof(szBox3D_1), "%.18g %.18g", sEnvelope.MinX, sEnvelope.MinY);
                CPLsnprintf(szBox3D_2, sizeof(szBox3D_2), "%.18g %.18g", sEnvelope.MaxX, sEnvelope.MaxY);
                osWHERE.Printf("WHERE %s && %s('BOX3D(%s, %s)'::box3d,%d) ",
                               OGRPGEscapeColumnName(poGeomFieldDefn->GetNameRef()).c_str(),
                               (poDS->sPostGISVersion.nMajor >= 2) ? "ST_SetSRID" : "SetSRID",
                               szBox3D_1, szBox3D_2, poGeomFieldDefn->nSRSId );
            }
            else
            {
                osWHERE = "";
            }

            BuildFullQueryStatement();
        }

        ResetReading();
    }

}
開發者ID:drownedout，項目名稱:datamap，代碼行數:59，代碼來源:ogrpgresultlayer.cpp

示例4: GetLayerDefn

void OGRUnionLayer::AutoWarpLayerIfNecessary(int iLayer)
{
    if( !pabCheckIfAutoWrap[iLayer] )
    {
        pabCheckIfAutoWrap[iLayer] = TRUE;

        for(int i=0; i<GetLayerDefn()->GetGeomFieldCount();i++)
        {
            OGRSpatialReference* poSRS = GetLayerDefn()->GetGeomFieldDefn(i)->GetSpatialRef();
            if( poSRS != NULL )
                poSRS->Reference();

            OGRFeatureDefn* poSrcFeatureDefn = papoSrcLayers[iLayer]->GetLayerDefn();
            int iSrcGeomField = poSrcFeatureDefn->GetGeomFieldIndex(
                    GetLayerDefn()->GetGeomFieldDefn(i)->GetNameRef());
            if( iSrcGeomField >= 0 )
            {
                OGRSpatialReference* poSRS2 =
                    poSrcFeatureDefn->GetGeomFieldDefn(iSrcGeomField)->GetSpatialRef();

                if( (poSRS == NULL && poSRS2 != NULL) ||
                    (poSRS != NULL && poSRS2 == NULL) )
                {
                    CPLError(CE_Warning, CPLE_AppDefined,
                            "SRS of geometry field '%s' layer %s not consistent with UnionLayer SRS",
                            GetLayerDefn()->GetGeomFieldDefn(i)->GetNameRef(),
                            papoSrcLayers[iLayer]->GetName());
                }
                else if (poSRS != NULL && poSRS2 != NULL &&
                        poSRS != poSRS2 && !poSRS->IsSame(poSRS2))
                {
                    CPLDebug("VRT", "SRS of geometry field '%s' layer %s not consistent with UnionLayer SRS. "
                            "Trying auto warping",
                            GetLayerDefn()->GetGeomFieldDefn(i)->GetNameRef(),
                            papoSrcLayers[iLayer]->GetName());
                    OGRCoordinateTransformation* poCT =
                        OGRCreateCoordinateTransformation( poSRS2, poSRS );
                    OGRCoordinateTransformation* poReversedCT = (poCT != NULL) ?
                        OGRCreateCoordinateTransformation( poSRS, poSRS2 ) : NULL;
                    if( poReversedCT != NULL )
                        papoSrcLayers[iLayer] = new OGRWarpedLayer(
                                    papoSrcLayers[iLayer], iSrcGeomField, TRUE, poCT, poReversedCT);
                    else
                    {
                        CPLError(CE_Warning, CPLE_AppDefined,
                                 "AutoWarpLayerIfNecessary failed to create "
                                 "poCT or poReversedCT.");
                        if ( poCT != NULL )
                            delete poCT;
                    }
                }
            }

            if( poSRS != NULL )
                poSRS->Release();
        }
    }
}
開發者ID:bbradbury，項目名稱:lib_gdal，代碼行數:58，代碼來源:ogrunionlayer.cpp

示例5: GetLayerDefn

OGRFeature *OGRGFTLayer::GetNextFeature()
{
    GetLayerDefn();

    while( true )
    {
        if (nNextInSeq < nOffset ||
            nNextInSeq >= nOffset + static_cast<int>(aosRows.size()))
        {
            if (bEOF)
                return nullptr;

            nOffset += static_cast<int>(aosRows.size());
            if (!FetchNextRows())
                return nullptr;
        }

        OGRFeature *poFeature = GetNextRawFeature();
        if (poFeature == nullptr)
            return nullptr;

        if((m_poFilterGeom == nullptr
            || FilterGeometry( poFeature->GetGeometryRef() ) )
        && (m_poAttrQuery == nullptr
            || m_poAttrQuery->Evaluate( poFeature )) )
        {
            return poFeature;
        }
        else
            delete poFeature;
    }
}
開發者ID:koordinates，項目名稱:gdal，代碼行數:32，代碼來源:ogrgftlayer.cpp

示例6: strcmp

OGRErr OGRUnionLayer::SetAttributeFilter( const char * pszAttributeFilterIn )
{
    if( pszAttributeFilterIn == NULL && pszAttributeFilter == NULL)
        return OGRERR_NONE;
    if( pszAttributeFilterIn != NULL && pszAttributeFilter != NULL &&
        strcmp(pszAttributeFilterIn, pszAttributeFilter) == 0)
        return OGRERR_NONE;

    if( poFeatureDefn == NULL ) GetLayerDefn();

    bAttrFilterPassThroughValue = -1;

    OGRErr eErr = OGRLayer::SetAttributeFilter(pszAttributeFilterIn);
    if( eErr != OGRERR_NONE )
        return eErr;

    CPLFree(pszAttributeFilter);
    pszAttributeFilter = pszAttributeFilterIn ?
                                CPLStrdup(pszAttributeFilterIn) : NULL;

    if( iCurLayer >= 0 && iCurLayer < nSrcLayers)
        ApplyAttributeFilterToSrcLayer(iCurLayer);

    return OGRERR_NONE;
}
開發者ID:bbradbury，項目名稱:lib_gdal，代碼行數:25，代碼來源:ogrunionlayer.cpp

示例7: FlushDeferedInsert

OGRFeature* OGRCARTODBTableLayer::GetFeature( GIntBig nFeatureId )
{

    if( bDeferedCreation && RunDeferedCreationIfNecessary() != OGRERR_NONE )
        return NULL;
    FlushDeferedInsert();

    GetLayerDefn();
    
    if( osFIDColName.size() == 0 )
        return OGRCARTODBLayer::GetFeature(nFeatureId);

    CPLString osSQL = osSELECTWithoutWHERE;
    osSQL += " WHERE ";
    osSQL += OGRCARTODBEscapeIdentifier(osFIDColName).c_str();
    osSQL += " = ";
    osSQL += CPLSPrintf(CPL_FRMT_GIB, nFeatureId);

    json_object* poObj = poDS->RunSQL(osSQL);
    json_object* poRowObj = OGRCARTODBGetSingleRow(poObj);
    if( poRowObj == NULL )
    {
        if( poObj != NULL )
            json_object_put(poObj);
        return OGRCARTODBLayer::GetFeature(nFeatureId);
    }

    OGRFeature* poFeature = BuildFeature(poRowObj);
    json_object_put(poObj);

    return poFeature;
}
開發者ID:rashadkm，項目名稱:lib_gdal，代碼行數:32，代碼來源:ogrcartodbtablelayer.cpp

示例8: GetLayerDefn

OGRFeature *OGRGFTLayer::GetNextFeature()
{
    OGRFeature  *poFeature;

    GetLayerDefn();

    while(TRUE)
    {
        if (nNextInSeq < nOffset ||
            nNextInSeq >= nOffset + (int)aosRows.size())
        {
            if (bEOF)
                return NULL;

            nOffset += aosRows.size();
            if (!FetchNextRows())
                return NULL;
        }

        poFeature = GetNextRawFeature();
        if (poFeature == NULL)
            return NULL;

        if((m_poFilterGeom == NULL
            || FilterGeometry( poFeature->GetGeometryRef() ) )
        && (m_poAttrQuery == NULL
            || m_poAttrQuery->Evaluate( poFeature )) )
        {
            return poFeature;
        }
        else
            delete poFeature;
    }
}
開發者ID:samalone，項目名稱:gdal-ios，代碼行數:34，代碼來源:ogrgftlayer.cpp

示例9: CPLAssert

void OGRGeoJSONLayer::AddFeature( OGRFeature* poFeature )
{
    CPLAssert( NULL != poFeature );

    // NOTE - mloskot:
    // Features may not be sorted according to FID values.

    // TODO: Should we check if feature already exists?
    // TODO: Think about sync operation, upload, etc.

    OGRFeature* poNewFeature = NULL;
    poNewFeature = poFeature->Clone();


    if( -1 == poNewFeature->GetFID() )
    {
        int nFID = static_cast<int>(seqFeatures_.size());
        poNewFeature->SetFID( nFID );

        // TODO - mlokot: We need to redesign creation of FID column
        int nField = poNewFeature->GetFieldIndex( DefaultFIDColumn );
        if( -1 != nField && GetLayerDefn()->GetFieldDefn(nField)->GetType() == OFTInteger )
        {
            poNewFeature->SetField( nField, nFID );
        }
    }

    seqFeatures_.push_back( poNewFeature );
}
開發者ID:0004c，項目名稱:node-gdal，代碼行數:29，代碼來源:ogrgeojsonlayer.cpp

示例10: GetExtent

OGRErr OGRLayer::GetExtent(OGREnvelope *psExtent, int bForce )

{
    OGRFeature  *poFeature;
    OGREnvelope oEnv;
    GBool       bExtentSet = FALSE;

    /* -------------------------------------------------------------------- */
    /*      If this layer has a none geometry type, then we can             */
    /*      reasonably assume there are not extents available.              */
    /* -------------------------------------------------------------------- */
    if( GetLayerDefn()->GetGeomType() == wkbNone )
    {
        psExtent->MinX = 0.0;
        psExtent->MaxX = 0.0;
        psExtent->MinY = 0.0;
        psExtent->MaxY = 0.0;

        return OGRERR_FAILURE;
    }

    /* -------------------------------------------------------------------- */
    /*      If not forced, we should avoid having to scan all the           */
    /*      features and just return a failure.                             */
    /* -------------------------------------------------------------------- */
    if( !bForce )
        return OGRERR_FAILURE;

    /* -------------------------------------------------------------------- */
    /*      OK, we hate to do this, but go ahead and read through all       */
    /*      the features to collect geometries and build extents.           */
    /* -------------------------------------------------------------------- */
    ResetReading();
    while( (poFeature = GetNextFeature()) != NULL )
    {
        OGRGeometry *poGeom = poFeature->GetGeometryRef();
        if (poGeom && !bExtentSet)
        {
            poGeom->getEnvelope(psExtent);
            bExtentSet = TRUE;
        }
        else if (poGeom)
        {
            poGeom->getEnvelope(&oEnv);
            if (oEnv.MinX < psExtent->MinX)
                psExtent->MinX = oEnv.MinX;
            if (oEnv.MinY < psExtent->MinY)
                psExtent->MinY = oEnv.MinY;
            if (oEnv.MaxX > psExtent->MaxX)
                psExtent->MaxX = oEnv.MaxX;
            if (oEnv.MaxY > psExtent->MaxY)
                psExtent->MaxY = oEnv.MaxY;
        }
        delete poFeature;
    }
    ResetReading();

    return (bExtentSet ? OGRERR_NONE : OGRERR_FAILURE);
}
開發者ID:Chaduke，項目名稱:bah.mod，代碼行數:59，代碼來源:ogrlayer.cpp

示例11: GetLayerDefn

GIntBig OGRSVGLayer::GetFeatureCount( int bForce )
{
    if (m_poAttrQuery != NULL || m_poFilterGeom != NULL)
        return OGRLayer::GetFeatureCount(bForce);

    GetLayerDefn();

    return nTotalFeatures;
}
開發者ID:bbradbury，項目名稱:lib_gdal，代碼行數:9，代碼來源:ogrsvglayer.cpp

示例12: CPLDebug

void OGRILI1Layer::JoinSurfaceLayer()
{
    if (poSurfacePolyLayer == 0) return;

    CPLDebug( "OGR_ILI", "Joining surface layer %s with geometries", GetLayerDefn()->GetName());
    GetLayerDefn()->SetGeomType(poSurfacePolyLayer->GetLayerDefn()->GetGeomType());
    ResetReading();
    while (OGRFeature *feature = GetNextFeatureRef())
    {
        OGRFeature *polyfeature = poSurfacePolyLayer->GetFeatureRef(feature->GetFID());
        if (polyfeature) {
            feature->SetGeometry(polyfeature->GetGeometryRef());
        }
    }

    ResetReading();
    poSurfacePolyLayer = 0;
}
開發者ID:brunosimoes，項目名稱:WorldWind，代碼行數:18，代碼來源:ogrili1layer.cpp

示例13: GetLayerDefn

OGRErr OGRGFTTableLayer::DeleteFeature( long nFID )
{
    GetLayerDefn();

    if (!poDS->IsReadWrite())
    {
        CPLError(CE_Failure, CPLE_AppDefined,
                 "Operation not available in read-only mode");
        return OGRERR_FAILURE;
    }

    if (osTableId.size() == 0)
    {
        CPLError(CE_Failure, CPLE_NotSupported,
                "Cannot delete feature in non-created table");
        return OGRERR_FAILURE;
    }

    if (poDS->GetAuth().size() == 0)
    {
        CPLError(CE_Failure, CPLE_AppDefined,
                 "Operation not available in unauthenticated mode");
        return OGRERR_FAILURE;
    }

    CPLString      osCommand;

    osCommand += "DELETE FROM ";
    osCommand += osTableId;
    osCommand += " WHERE ROWID = '";
    osCommand += CPLSPrintf("%ld", nFID);
    osCommand += "'";

    //CPLDebug("GFT", "%s",  osCommand.c_str());

    CPLHTTPResult * psResult = poDS->RunSQL(osCommand);
    if (psResult == NULL)
    {
        CPLError(CE_Failure, CPLE_AppDefined, "Feature deletion failed");
        return OGRERR_FAILURE;
    }

    char* pszLine = (char*) psResult->pabyData;
    if (pszLine == NULL ||
        strncmp(pszLine, "OK", 2) != 0 ||
        psResult->pszErrBuf != NULL)
    {
        CPLError(CE_Failure, CPLE_AppDefined, "Feature deletion failed");
        CPLHTTPDestroyResult(psResult);
        return OGRERR_FAILURE;
    }

    CPLHTTPDestroyResult(psResult);

    return OGRERR_NONE;
}
開發者ID:Joe-xXx，項目名稱:gdal，代碼行數:56，代碼來源:ogrgfttablelayer.cpp

示例14: GetLayerDefn

const char *OGRDB2Layer::GetFIDColumn()

{
    GetLayerDefn();

    if( pszFIDColumn != nullptr )
        return pszFIDColumn;
    else
        return "";
}
開發者ID:OSGeo，項目名稱:gdal，代碼行數:10，代碼來源:ogrdb2layer.cpp

示例15: GetLayerDefn

int OGROCIWritableLayer::FindFieldIndex( const char *pszFieldName, int bExactMatch )
{
  int iField = GetLayerDefn()->GetFieldIndex( pszFieldName );

  if( !bExactMatch && iField < 0 )
  {
      // try laundered version
      OGROCISession *poSession = poDS->GetSession();
      char *pszSafeName = CPLStrdup( pszFieldName );

      poSession->CleanName( pszSafeName );

      iField = GetLayerDefn()->GetFieldIndex( pszSafeName );

      CPLFree( pszSafeName );
  }

  return iField;
}
開發者ID:AbdelghaniDr，項目名稱:mirror，代碼行數:19，代碼來源:ogrociwritablelayer.cpp


注：本文中的GetLayerDefn函數示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。