C++ mapnik::query方法代码示例

本文整理汇总了C++中mapnik::query方法的典型用法代码示例。如果您正苦于以下问题：C++ mapnik::query方法的具体用法？C++ mapnik::query怎么用？C++ mapnik::query使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类mapnik的用法示例。

在下文中一共展示了mapnik::query方法的9个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: features

featureset_ptr sqlite_datasource::features(query const& q) const
{
   if (!is_bound_) bind();
   if (dataset_)
   {
        mapnik::box2d<double> const& e = q.get_bbox();

        std::ostringstream s;
        
        s << "SELECT " << geometry_field_ << "," << key_field_;
        std::set<std::string> const& props = q.property_names();
        std::set<std::string>::const_iterator pos = props.begin();
        std::set<std::string>::const_iterator end = props.end();
        while (pos != end)
        {
            s << ",\"" << *pos << "\"";
            ++pos;
        }       
        
        s << " FROM "; 
        
        std::string query (table_); 
        
        if (use_spatial_index_)
        {
           std::ostringstream spatial_sql;
           spatial_sql << std::setprecision(16);
           spatial_sql << " WHERE " << key_field_ << " IN (SELECT pkid FROM idx_" << geometry_table_ << "_" << geometry_field_;
           spatial_sql << " WHERE xmax>=" << e.minx() << " AND xmin<=" << e.maxx() ;
           spatial_sql << " AND ymax>=" << e.miny() << " AND ymin<=" << e.maxy() << ")";
           if (boost::algorithm::ifind_first(query, "WHERE"))
           {
              boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
           }
           else if (boost::algorithm::ifind_first(query, geometry_table_))  
           {
              boost::algorithm::ireplace_first(query, table_, table_ + " " + spatial_sql.str());
           }
        }
        
        s << query ;
        
        if (row_limit_ > 0) {
            s << " LIMIT " << row_limit_;
        }

        if (row_offset_ > 0) {
            s << " OFFSET " << row_offset_;
        }

#ifdef MAPNIK_DEBUG
        std::clog << "Sqlite Plugin: " << s.str() << std::endl;
#endif

        boost::shared_ptr<sqlite_resultset> rs (dataset_->execute_query (s.str()));

        return boost::make_shared<sqlite_featureset>(rs, desc_.get_encoding(), format_, multiple_geometries_);
   }

   return featureset_ptr();
}

开发者ID:makinacorpus，项目名称:mapnik2，代码行数:61，代码来源:sqlite_datasource.cpp

示例2: features_at_point

featureset_ptr sqlite_datasource::features_at_point(coord2d const& pt) const
{
   if (!is_bound_) bind();

   if (dataset_)
   {
        // TODO - need tolerance
        mapnik::box2d<double> const e(pt.x,pt.y,pt.x,pt.y);

        std::ostringstream s;
        s << "SELECT " << geometry_field_ << "," << key_field_;
        std::vector<attribute_descriptor>::const_iterator itr = desc_.get_descriptors().begin();
        std::vector<attribute_descriptor>::const_iterator end = desc_.get_descriptors().end();
        while (itr != end)
        {
            std::string fld_name = itr->get_name();
            if (fld_name != key_field_)
                s << ",\"" << itr->get_name() << "\"";
            ++itr;
        }
        
        s << " FROM "; 
        
        std::string query (table_); 
        
        if (use_spatial_index_)
        {
           std::ostringstream spatial_sql;
           spatial_sql << std::setprecision(16);
           spatial_sql << " WHERE " << key_field_ << " IN (SELECT pkid FROM idx_" << geometry_table_ << "_" << geometry_field_;
           spatial_sql << " WHERE xmax>=" << e.minx() << " AND xmin<=" << e.maxx() ;
           spatial_sql << " AND ymax>=" << e.miny() << " AND ymin<=" << e.maxy() << ")";
           if (boost::algorithm::ifind_first(query, "WHERE"))
           {
              boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
           }
           else if (boost::algorithm::ifind_first(query, geometry_table_))  
           {
              boost::algorithm::ireplace_first(query, table_, table_ + " " + spatial_sql.str());
           }
        }
        
        s << query ;
        
        if (row_limit_ > 0) {
            s << " LIMIT " << row_limit_;
        }

        if (row_offset_ > 0) {
            s << " OFFSET " << row_offset_;
        }

#ifdef MAPNIK_DEBUG
        std::clog << "Sqlite Plugin: " << s.str() << std::endl;
#endif

        boost::shared_ptr<sqlite_resultset> rs (dataset_->execute_query (s.str()));

        return boost::make_shared<sqlite_featureset>(rs, desc_.get_encoding(), format_, multiple_geometries_);
   }
      
   return featureset_ptr();
}

开发者ID:makinacorpus，项目名称:mapnik2，代码行数:63，代码来源:sqlite_datasource.cpp

示例3: features

featureset_ptr occi_datasource::features(query const& q) const
{
    if (! is_bound_) bind();

#ifdef MAPNIK_STATS
    mapnik::progress_timer __stats__(std::clog, "occi_datasource::features");
#endif

    box2d<double> const& box = q.get_bbox();

    std::ostringstream s;
    s << "SELECT ";
    if (use_wkb_)
    {
        s << "SDO_UTIL.TO_WKBGEOMETRY(" << geometry_field_ << ")";
    }
    else
    {
        s << geometry_field_;
    }
    std::set<std::string> const& props = q.property_names();
    std::set<std::string>::const_iterator pos = props.begin();
    std::set<std::string>::const_iterator end = props.end();
    mapnik::context_ptr ctx = boost::make_shared<mapnik::context_type>();
    for (; pos != end; ++pos)
    {
        s << ", " << *pos;
        ctx->push(*pos);
    }

    s << " FROM ";

    std::string query(table_);

    if (use_spatial_index_)
    {
        std::ostringstream spatial_sql;
        spatial_sql << std::setprecision(16);
        spatial_sql << " WHERE SDO_FILTER(" << geometry_field_ << ",";
        spatial_sql << "  MDSYS.SDO_GEOMETRY(" << SDO_GTYPE_2DPOLYGON << "," << srid_ << ",NULL,";
        spatial_sql << "  MDSYS.SDO_ELEM_INFO_ARRAY(1," << SDO_ETYPE_POLYGON << "," << SDO_INTERPRETATION_RECTANGLE << "),";
        spatial_sql << "  MDSYS.SDO_ORDINATE_ARRAY(";
        spatial_sql << box.minx() << "," << box.miny() << ", ";
        spatial_sql << box.maxx() << "," << box.maxy() << ")), 'querytype=WINDOW') = 'TRUE'";

        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name_))
        {
            boost::algorithm::ireplace_first(query, table_name_, table_name_ + " " + spatial_sql.str());
        }
        else
        {
            MAPNIK_LOG_WARN(occi) << "occi_datasource: cannot determine where to add the spatial filter declaration";
        }
    }

    if (row_limit_ > 0)
    {
        std::ostringstream row_limit_string;
        row_limit_string << "rownum < " << row_limit_;
        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", row_limit_string.str() + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name_))
        {
            boost::algorithm::ireplace_first(query, table_name_, table_name_ + " " + row_limit_string.str());
        }
        else
        {
            MAPNIK_LOG_WARN(occi) << "occi_datasource: Cannot determine where to add the row limit declaration";
        }
    }

    s << query;

    MAPNIK_LOG_DEBUG(occi) << "occi_datasource: " << s.str();

    return boost::make_shared<occi_featureset>(pool_,
                                               conn_,
                                               ctx,
                                               s.str(),
                                               desc_.get_encoding(),
                                               use_connection_pool_,
                                               use_wkb_,
                                               row_prefetch_);
}

开发者ID:ClaudioFloreani，项目名称:mapnik，代码行数:90，代码来源:occi_datasource.cpp

示例4: features_at_point

featureset_ptr occi_datasource::features_at_point(coord2d const& pt) const
{
    if (! is_bound_) bind();

#ifdef MAPNIK_STATS
    mapnik::progress_timer __stats__(std::clog, "occi_datasource::features_at_point");
#endif

    std::ostringstream s;
    s << "SELECT ";
    if (use_wkb_)
    {
        s << "SDO_UTIL.TO_WKBGEOMETRY(" << geometry_field_ << ")";
    }
    else
    {
        s << geometry_field_;
    }
    std::vector<attribute_descriptor>::const_iterator itr = desc_.get_descriptors().begin();
    std::vector<attribute_descriptor>::const_iterator end = desc_.get_descriptors().end();
    mapnik::context_ptr ctx = boost::make_shared<mapnik::context_type>();
    while (itr != end)
    {
        s << ", " << itr->get_name();
        ctx->push(itr->get_name());
        ++itr;
    }

    s << " FROM ";

    std::string query(table_);

    if (use_spatial_index_)
    {
        std::ostringstream spatial_sql;
        spatial_sql << std::setprecision(16);
        spatial_sql << " WHERE SDO_FILTER(" << geometry_field_ << ",";
        spatial_sql << "  MDSYS.SDO_GEOMETRY(" << SDO_GTYPE_2DPOINT << "," << srid_ << ",NULL,";
        spatial_sql << "  MDSYS.SDO_ELEM_INFO_ARRAY(1," << SDO_ETYPE_POINT << "," << SDO_INTERPRETATION_POINT << "),";
        spatial_sql << "  MDSYS.SDO_ORDINATE_ARRAY(";
        spatial_sql << pt.x << "," << pt.y << ")), 'querytype=WINDOW') = 'TRUE'";

        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name_))
        {
            boost::algorithm::ireplace_first(query, table_name_, table_name_ + " " + spatial_sql.str());
        }
        else
        {
            MAPNIK_LOG_WARN(occi) << "occi_datasource: Cannot determine where to add the spatial filter declaration";
        }
    }

    if (row_limit_ > 0)
    {
        std::ostringstream row_limit_string;
        row_limit_string << "rownum < " << row_limit_;
        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", row_limit_string.str() + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name_))
        {
            boost::algorithm::ireplace_first(query, table_name_, table_name_ + " " + row_limit_string.str());
        }
        else
        {
            MAPNIK_LOG_WARN(occi) << "occi_datasource: Cannot determine where to add the row limit declaration";
        }
    }

    s << query;

    MAPNIK_LOG_DEBUG(occi) << "occi_datasource: " << s.str();

    return boost::make_shared<occi_featureset>(pool_,
                                               conn_,
                                               ctx,
                                               s.str(),
                                               desc_.get_encoding(),
                                               use_connection_pool_,
                                               use_wkb_,
                                               row_prefetch_);
}

开发者ID:ClaudioFloreani，项目名称:mapnik，代码行数:87，代码来源:occi_datasource.cpp

示例5: features_at_point

featureset_ptr sqlite_datasource::features_at_point(coord2d const& pt, double tol) const
{
#ifdef MAPNIK_STATS
    mapnik::progress_timer __stats__(std::clog, "sqlite_datasource::features_at_point");
#endif

    if (dataset_)
    {
        mapnik::box2d<double> e(pt.x, pt.y, pt.x, pt.y);
        e.pad(tol);
        std::ostringstream s;
        mapnik::context_ptr ctx = std::make_shared<mapnik::context_type>();

        s << "SELECT " << geometry_field_;
        if (!key_field_.empty())
        {
            s << "," << key_field_;
            ctx->push(key_field_);
        }

        std::vector<attribute_descriptor>::const_iterator itr = desc_.get_descriptors().begin();
        std::vector<attribute_descriptor>::const_iterator end = desc_.get_descriptors().end();

        for ( ; itr != end; ++itr)
        {
            std::string fld_name = itr->get_name();
            if (fld_name != key_field_)
            {
                s << ",[" << itr->get_name() << "]";
                ctx->push(itr->get_name());
            }
        }

        s << " FROM ";

        std::string query(table_);

        if (! key_field_.empty() && has_spatial_index_)
        {
            // TODO - debug warn if fails
            sqlite_utils::apply_spatial_filter(query,
                                               e,
                                               table_,
                                               key_field_,
                                               index_table_,
                                               geometry_table_,
                                               intersects_token_);
        }
        else
        {
            query = populate_tokens(table_);
        }

        s << query ;

        if (row_limit_ > 0)
        {
            s << " LIMIT " << row_limit_;
        }

        if (row_offset_ > 0)
        {
            s << " OFFSET " << row_offset_;
        }

        MAPNIK_LOG_DEBUG(sqlite) << "sqlite_datasource: " << s.str();

        std::shared_ptr<sqlite_resultset> rs(dataset_->execute_query(s.str()));

        return std::make_shared<sqlite_featureset>(rs,
                                                     ctx,
                                                     desc_.get_encoding(),
                                                     e,
                                                     format_,
                                                     has_spatial_index_,
                                                     using_subquery_);
    }

    return featureset_ptr();
}

开发者ID:Mappy，项目名称:mapnik，代码行数:80，代码来源:sqlite_datasource.cpp

示例6: features

featureset_ptr sqlite_datasource::features(query const& q) const
{
#ifdef MAPNIK_STATS
    mapnik::progress_timer __stats__(std::clog, "sqlite_datasource::features");
#endif

    if (dataset_)
    {
        mapnik::box2d<double> const& e = q.get_bbox();

        std::ostringstream s;
        mapnik::context_ptr ctx = std::make_shared<mapnik::context_type>();

        s << "SELECT " << geometry_field_;
        if (!key_field_.empty())
        {
            s << "," << key_field_;
            ctx->push(key_field_);
        }
        std::set<std::string> const& props = q.property_names();
        std::set<std::string>::const_iterator pos = props.begin();
        std::set<std::string>::const_iterator end = props.end();

        for ( ;pos != end;++pos)
        {
            // TODO - should we restrict duplicate key query?
            //if (*pos != key_field_)
            s << ",[" << *pos << "]";
            ctx->push(*pos);
        }
        s << " FROM ";

        std::string query(table_);

        if (! key_field_.empty() && has_spatial_index_)
        {
            // TODO - debug warn if fails
            sqlite_utils::apply_spatial_filter(query,
                                               e,
                                               table_,
                                               key_field_,
                                               index_table_,
                                               geometry_table_,
                                               intersects_token_);
        }
        else
        {
            query = populate_tokens(table_);
        }

        s << query ;

        if (row_limit_ > 0)
        {
            s << " LIMIT " << row_limit_;
        }

        if (row_offset_ > 0)
        {
            s << " OFFSET " << row_offset_;
        }

        MAPNIK_LOG_DEBUG(sqlite) << "sqlite_datasource: " << s.str();

        std::shared_ptr<sqlite_resultset> rs(dataset_->execute_query(s.str()));

        return std::make_shared<sqlite_featureset>(rs,
                                                     ctx,
                                                     desc_.get_encoding(),
                                                     e,
                                                     format_,
                                                     has_spatial_index_,
                                                     using_subquery_);
    }

    return featureset_ptr();
}

开发者ID:Mappy，项目名称:mapnik，代码行数:77，代码来源:sqlite_datasource.cpp

示例7: features_at_point

featureset_ptr occi_datasource::features_at_point(coord2d const& pt) const
{
    if (!is_bound_) bind();

    std::ostringstream s;
    s << "SELECT " << geometry_field_;
    std::vector<attribute_descriptor>::const_iterator itr = desc_.get_descriptors().begin();
    std::vector<attribute_descriptor>::const_iterator end = desc_.get_descriptors().end();
    unsigned size=0;
    while (itr != end)
    {
        s << ", " << itr->get_name();
        ++itr;
        ++size;
    }

    s << " FROM ";

    std::string query (table_);
    std::string table_name = mapnik::table_from_sql(query);

    if (use_spatial_index_)
    {
        std::ostringstream spatial_sql;
        spatial_sql << std::setprecision(16);
        spatial_sql << " WHERE SDO_FILTER(" << geometry_field_ << ",";
        spatial_sql << "  MDSYS.SDO_GEOMETRY(" << SDO_GTYPE_2DPOINT << "," << srid_ << ",NULL,";
        spatial_sql << "  MDSYS.SDO_ELEM_INFO_ARRAY(1," << SDO_ETYPE_POINT << "," << SDO_INTERPRETATION_POINT << "),";
        spatial_sql << "  MDSYS.SDO_ORDINATE_ARRAY(";
        spatial_sql << pt.x << "," << pt.y << ")), 'querytype=WINDOW') = 'TRUE'";

        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
        }
        else if (boost::algorithm::ifind_first(query,table_name))
        {
            boost::algorithm::ireplace_first(query, table_name, table_name + " " + spatial_sql.str());
        }
        else
        {
#ifdef MAPNIK_DEBUG
            std::clog << "OCCI Plugin: cannot determine where to add the spatial filter declaration" << std::endl;
#endif
        }
    }

    if (row_limit_ > 0)
    {
        std::string row_limit_string = "rownum < " + row_limit_;

        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", row_limit_string + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name))
        {
            boost::algorithm::ireplace_first(query, table_name, table_name + " " + row_limit_string);
        }
        else
        {
#ifdef MAPNIK_DEBUG
            std::clog << "OCCI Plugin: cannot determine where to add the row limit declaration" << std::endl;
#endif
        }
    }

    s << query;

#ifdef MAPNIK_DEBUG
    std::clog << "OCCI Plugin: " << s.str() << std::endl;
#endif

    return featureset_ptr (new occi_featureset (pool_,
                                                conn_,
                                                s.str(),
                                                desc_.get_encoding(),
                                                multiple_geometries_,
                                                use_connection_pool_,
                                                row_prefetch_,
                                                size));
}

开发者ID:BenMoores，项目名称:mapnik-trunk，代码行数:82，代码来源:occi_datasource.cpp

示例8: features

featureset_ptr occi_datasource::features(query const& q) const
{
    if (!is_bound_) bind();

    box2d<double> const& box=q.get_bbox();

    std::ostringstream s;
    s << "SELECT " << geometry_field_;
    std::set<std::string> const& props = q.property_names();
    std::set<std::string>::const_iterator pos = props.begin();
    std::set<std::string>::const_iterator end = props.end();
    while (pos != end)
    {
        s << ", " << *pos;
        ++pos;
    }

    s << " FROM ";

    std::string query (table_);
    std::string table_name = mapnik::table_from_sql(query);

    if (use_spatial_index_)
    {
        std::ostringstream spatial_sql;
        spatial_sql << std::setprecision(16);
        spatial_sql << " WHERE SDO_FILTER(" << geometry_field_ << ",";
        spatial_sql << "  MDSYS.SDO_GEOMETRY(" << SDO_GTYPE_2DPOLYGON << "," << srid_ << ",NULL,";
        spatial_sql << "  MDSYS.SDO_ELEM_INFO_ARRAY(1," << SDO_ETYPE_POLYGON << "," << SDO_INTERPRETATION_RECTANGLE << "),";
        spatial_sql << "  MDSYS.SDO_ORDINATE_ARRAY(";
        spatial_sql << box.minx() << "," << box.miny() << ", ";
        spatial_sql << box.maxx() << "," << box.maxy() << ")), 'querytype=WINDOW') = 'TRUE'";

        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name))
        {
            boost::algorithm::ireplace_first(query, table_name, table_name + " " + spatial_sql.str());
        }
        else
        {
#ifdef MAPNIK_DEBUG
            std::clog << "OCCI Plugin: cannot determine where to add the spatial filter declaration" << std::endl;
#endif
        }
    }

    if (row_limit_ > 0)
    {
        std::string row_limit_string = "rownum < " + row_limit_;

        if (boost::algorithm::ifind_first(query, "WHERE"))
        {
            boost::algorithm::ireplace_first(query, "WHERE", row_limit_string + " AND ");
        }
        else if (boost::algorithm::ifind_first(query, table_name))
        {
            boost::algorithm::ireplace_first(query, table_name, table_name + " " + row_limit_string);
        }
        else
        {
#ifdef MAPNIK_DEBUG
            std::clog << "OCCI Plugin: cannot determine where to add the row limit declaration" << std::endl;
#endif
        }
    }

    s << query;

#ifdef MAPNIK_DEBUG
    std::clog << "OCCI Plugin: " << s.str() << std::endl;
#endif

    return featureset_ptr (new occi_featureset (pool_,
                                                conn_,
                                                s.str(),
                                                desc_.get_encoding(),
                                                multiple_geometries_,
                                                use_connection_pool_,
                                                row_prefetch_,
                                                props.size()));
}

开发者ID:BenMoores，项目名称:mapnik-trunk，代码行数:84，代码来源:occi_datasource.cpp

示例9: features

featureset_ptr spatialite_datasource::features(query const& q) const
{
   if (!is_bound_) bind();
   if (dataset_)
   {
        mapnik::box2d<double> const& e = q.get_bbox();

        std::ostringstream s;
        
        s << "SELECT " << geometry_field_ << "," << key_field_;
        std::set<std::string> const& props = q.property_names();
        std::set<std::string>::const_iterator pos = props.begin();
        std::set<std::string>::const_iterator end = props.end();
        while (pos != end)
        {
            s << ",\"" << *pos << "\"";
            ++pos;
        }       
        
        s << " FROM "; 
        
        std::string query (table_);
        
        /* todo
          throw if select * and key_field == rowid?
          or add schema support so sqlite throws
        */
        
        if (has_spatial_index_)
        {
           /* 
              Use rtree to limit record id's to a given bbox
              then a btree to pull the records for those ids.        
           */
           std::ostringstream spatial_sql;
           spatial_sql << std::setprecision(16);
           spatial_sql << " WHERE " << key_field_ << " IN (SELECT pkid FROM " << index_table_;
           spatial_sql << " WHERE xmax>=" << e.minx() << " AND xmin<=" << e.maxx() ;
           spatial_sql << " AND ymax>=" << e.miny() << " AND ymin<=" << e.maxy() << ")";
           if (boost::algorithm::ifind_first(query, "WHERE"))
           {
              boost::algorithm::ireplace_first(query, "WHERE", spatial_sql.str() + " AND ");
           }
           else if (boost::algorithm::ifind_first(query, geometry_table_))  
           {
              boost::algorithm::ireplace_first(query, table_, table_ + " " + spatial_sql.str());
           }

           /* support UNION queries */
           // #if 0
           if(boost::algorithm::ifind_first(query, "union"))
           {
                      /* use spatial index for UNION query, too */
                      boost::algorithm::ireplace_last(query, "WHERE", spatial_sql.str() + " AND ");
           }
           // #endif

        }
        
        s << query ;
        
        if (row_limit_ > 0) {
            s << " LIMIT " << row_limit_;
        }

        if (row_offset_ > 0) {
            s << " OFFSET " << row_offset_;
        }

#ifdef MAPNIK_DEBUG
        std::clog << "Spatialite Plugin: table_: " << table_ << "\n\n";
        std::clog << "Spatialite Plugin: query:" << s.str() << "\n\n";
#endif

        boost::shared_ptr<sqlite_resultset> rs(dataset_->execute_query(s.str()));

        return boost::make_shared<spatialite_featureset>(rs, desc_.get_encoding(), format_, multiple_geometries_, using_subquery_);
   }

   return featureset_ptr();
}

开发者ID:shujaatak，项目名称:luckygps2，代码行数:81，代码来源:spatialite_datasource.cpp

注：本文中的mapnik::query方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。