Don,
You've probably already solved this but perhaps you could use a plPgSQL
function or two like this:
Create Function gis.DMS2DD( dDeg In Float,
dMin In Float,
dSec In Float)
Returns Float
AS
$BODY$
Declare
dDD Float;
BEGIN
dDD := ABS(dDeg) + dMin / 60::float + dSec / 3600::float;
Return SIGN(dDeg) * dDD;
End;
$BODY$
LANGUAGE 'plpgsql' IMMUTABLE STRICT
COST 100;
SELECT gis.DMS2DD(-44,10,50);
SELECT gis.DMS2DD(-44,00,00);
Create or Replace Function gis.DD2DMS( dDecDeg in Float,
pDegreeSymbol in VarChar(1),
pMinuteSymbol in VarChar(1),
pSecondSymbol in VarChar(1) )
Returns varchar(50)
AS
$BODY$
DECLARE
iDeg Int;
iMin Int;
dSec Float;
BEGIN
iDeg := Trunc(dDecDeg)::Int;
iMin := Trunc( (Abs(dDecDeg) - Abs(iDeg)) * 60)::Int;
dSec := Round(((((Abs(dDecDeg) - Abs(iDeg)) * 60) - iMin) * 60)::numeric,
3)::float;
Return trim(to_char(iDeg,'9999')) || pDegreeSymbol::text ||
trim(to_char(iMin,'99')) || pMinuteSymbol::text || case when dSec = 0::Float
then '0' else replace(trim(to_char(dSec,'99.999')),'.000','') end ||
pSecondSymbol::text;
END;
$BODY$
LANGUAGE 'plpgsql' IMMUTABLE STRICT
COST 100;
select gis.DD2DMS(-44,'d','m','s');
select gis.DD2DMS(-44.5,'d','m','s');
select gis.DD2DMS(-44.577,'d','m','s');
select gis.DD2DMS(gis.DMS2DD(-44,10,50),'d','s','"');
regards
Simon
On Tue, 26 Jan 2010 23:01:44 +1100, Don <harte...@comcast.net> wrote:
I haven't been able to find a function that will convert a decimal
latitude or longitude to degrees minutes seconds.
Am I missing something? I am doing a query and get complicated
expressions like
lpad((round((((abs(long_wgs84)-floor(abs(long_wgs84)))*60::double
precision - floor((abs(long_wgs84)-floor(abs(long_wgs84)))*60::double
precision))*60::double precision)::numeric,1)*10::real)::text,3,'0')
for seconds decimal rounded*10 padded
to get the seconds for the following format ddmmsss.
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