獲得柵格對象自定義元數(shù)據(jù)項的名稱列表。

語法

text[] ST_metaItems(raster raster_obj);
text[] ST_metaItems(raster raster_obj,
                    integer band);

參數(shù)

參數(shù)名稱 描述
raster_obj 需要計算的raster對象。
band 波段序號，取值從0開始。

示例

-- meta data items of a raster
SELECT ST_MetaItems(raster_obj) 
FROM raster_table;
                                                                       st_metaitems                                                                                                                                    
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 {latitude#long_name,latitude#units,longitude#long_name,longitude#units,NC_GLOBAL#Conventions,NC_GLOBAL#history,NETCDF_DIM_EXTRA,NETCDF_DIM_time_DEF,NETCDF_DIM_time_VALUES}
  
-- meta data items of a band
SELECT ST_MetaItems(raster_obj, 0) 
FROM raster_table;

                                       st_metaitems                                        
-------------------------------------------------------------------------------------------
{add_offset,long_name,missing_value,NETCDF_DIM_time,NETCDF_VARNAME,scale_factor,units,_FillValue}