C++ (Cpp) OGRLayer::GetMetadataItem Beispiele

Beispiel #1

Datei: ngw_gdal_io.cpp Projekt: nextgis/formbuilder

bool NgwGdalIo::getLayerInfo (NgwLayerInfo &layer_info, QString base_url, int resource_id)
{
    GDALDatasetPtr dataset_p;
    u_openDataset(dataset_p, base_url, resource_id, true);
    if (dataset_p.data() == NULL)
    {
        error = QObject::tr("Unable to open NGW dataset via GDAL");
        return false;
    }

    OGRLayer *layer = dataset_p.data()->GetLayer(0);
    if (layer == NULL)
    {
        error = QObject::tr("Unable to open [0] layer of NGW dataset via GDAL");
        return false;
    }

    OGRFeatureDefn *layer_defn = layer->GetLayerDefn();

    layer_info.name = layer->GetName();
    layer_info.geom_type = Core::g_findGeomTypeNgw(layer->GetGeomType());
    for (int i = 0; i < layer_defn->GetFieldCount(); i++)
    {
        QString s_field_alias = QString("FIELD_%1_ALIAS").arg(i);
        QString alias = layer->GetMetadataItem(s_field_alias.toUtf8().data());

        OGRFieldDefn *field_defn = layer_defn->GetFieldDefn(i);
        layer_info.fields.append({field_defn->GetNameRef(), alias,
                                  Core::g_findFieldTypeNgw(field_defn->GetType())});
    }

    return true;
}