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}