Absolutely.
See attached, a simple plpgsql function that adds header info around the
current askml function.
I do this in psql:
-- Set output to unaligned
\a
-- Show only tuples
\t
-- Dump query to a file
\o my_kml_file.kml
-- Run your query
SELECT askml('my_line', 'description', 'SRID=3005;LINESTRING( 1190000
390000, 1200000 390000, 1200000 380000, 1190000 380000, 1190000 390000
)'::geometry);
-- Flush output your file and close the output stream
\o
Loading this file in Google Earth will draw a box around Victoria, BC.
I often collect() geometries from a table and pass those into this function:
SELECT askml('my_title', 'description', collect(the_geom)) FROM my_line
table WHERE ....
Cheers,
Kevin
-------------
Kevin Neufeld
Software Developer
Refractions Research Inc.
300-1207 Douglas St.
Victoria, B.C., V8W 2E7
Phone: (250) 383-3022
Email: [EMAIL PROTECTED]
Maciej Skorczewski wrote:
hi all!
How should i use AsKML() function to create KML files (w try show
postgis data in google maps nad google earth)
It is posible?
-- Function: public.askml(text, text, geometry)
-- DROP FUNCTION public.askml(text, text, geometry);
CREATE OR REPLACE FUNCTION public.askml(name text, description text, the_geom
geometry)
RETURNS text AS
$BODY$
DECLARE
result text;
BEGIN
result := '<?xml version=''1.0'' encoding=''UTF-8''?>' || E'\n' ||
'<kml xmlns=''http://earth.google.com/kml/2.1''>' || E'\n' ||
'<Document>' || E'\n' ||
'<name>' || quote_literal(name) || '</name>' || E'\n' ||
'<description>' || quote_literal(description) ||
'</description>' || E'\n\n' ||
'<Style id=''defaultStyle''>' || E'\n' ||
' <LineStyle>' || E'\n' ||
' <color>ff00ff00</color>' || E'\n' ||
' <width>1</width>' || E'\n' ||
' </LineStyle>' || E'\n' ||
' <PolyStyle>' || E'\n' ||
' <color>5f00ff00</color>' || E'\n' ||
' </PolyStyle>' || E'\n' ||
'</Style>' || E'\n\n' ||
'<Placemark>' || E'\n' ||
'<styleUrl>#defaultStyle</styleUrl>' || E'\n';
result := result || askml(the_geom) || E'\n';
result := result ||
'</Placemark>' || E'\n\n' ||
'</Document>' || E'\n' ||
'</kml>';
RETURN result;
END;
$BODY$
LANGUAGE 'plpgsql' IMMUTABLE;
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