Sql m来自地磁'SRID=4326的季节顺序；点（-49.264791-25.427251）:：几何极限10；' id | name | latitude | longitude SELECT AddGeometryColumn ( 'public' , '

m来自地磁'SRID=4326的季节顺序；点（-49.264791-25.427251）:：几何极限10；'

id | name | latitude | longitude

SELECT AddGeometryColumn ( 'public' , ' green ', ' geom ' , 4326 , ' POINT' , 2 );

UPDATE season
SET geom = ST_Transform(ST_PointFromText ('POINT (' || longitude || ' ' || latitude || ')', 4269), 4326);

SELECT id, name
FROM season
WHERE ST_DWithin (
                 geom ,
                 ST_GeomFromText ('POINT(-49.2653819 -25.4244287 )', 4326),
                 1000
                 );

select * from spatial_ref_sys where srid=4629

4269 | EPSG      |      4269 | GEOGCS["NAD83",DATUM["North_American_Datum_1983"
,SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["
EPSG","6269"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01
745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4269"]] | +proj=long
lat +ellps=GRS80 +datum=NAD83 +no_defs

select * from spatial_ref_sys where auth_name ilike '%Bras%';

select ST_Astext(ST_Transform(ST_SetSrid(ST_Makepoint(-49.265, -25.424),4326), 29101));

UPDATE season SET geom = ST_PointFromText ('POINT(' || longitude || ' ' || latitude || ')' , 4326 ) ;

CREATE INDEX [indexname] ON [tablename] USING GIST ( [geometryfield] ); 

SELECT *,ST_Distance(geom,'SRID=4326;POINT(newLon newLat)'::geometry) 
FROM yourDbTable
ORDER BY
yourDbTable.geom <->'SRID=4326;POINT(newLon newLat)'::geometry
LIMIT 10;

SELECT *,ST_Distance(geography(geom),ST_GeographyFromText('POINT(newLon newLat)') 
FROM yourDbTable
ORDER BY
yourDbTable.geom <->'SRID=4326;POINT(newLon newLat)'::geometry
LIMIT 10;