Extracting ordinates

Question

Can anyone tell me if it is possible to extract the X + Y values from an SDO_GEOMETRY in a form that allows one record per pair of ordinates?
I have two queries that I would like to combine in order to return the following example record set...
ID X Y
a 1 1
a 2 1
a 2 2
a 1 2
This query lets me extract the object id a...
select A.ID
from MPCOAST A
where sdo_relate(A.SHAPE,
mdsys.sdo_geometry(2003, null, null,
mdsys.sdo_elem_info_array(1, 1003, 3),
mdsys.sdo_ordinate_array(0, 0, 5, 5)),
'mask=anyinteract querytype=window') = 'TRUE';
And this one gets me all ordinates for object a...
select c.id, a.column_value ord
from mpcoast c, TABLE(c.shape.SDO_ORDINATES) a
where c.id = 'a';
My problem is that the second query returns one record per ordinate not pair of.
I would like each record to contain both X and Y ordinates for each point in each object.
Any help would be helpful.
BTW: Why os the spatial documentation so difficult to comprehend? Thank goodness for this forum!

Answer 1

This works with my data. It is three-dimensional. So you will have to adjust for two-dimensionsal.
set serveroutput on
SET serveroutput on SIZE 1000000
set concat on
DEFINE layername = 'CO19_LRS';
DEFINE geomcolname = 'GEOM';
DECLARE
id varchar2(10);
longitude number;
latitude number;
logmile number;
i number;
theLayer varchar2(32);
theGeomCol varchar2(32);
BEGIN
FOR rec IN (SELECT ROWID, id, &geomcolname FROM &layername ) LOOP
id := rec.id;
i := 1;
while i < rec.geom.sdo_ordinates.count loop
longitude:=rec.geom.sdo_ordinates(i);
latitude:=rec.geom.sdo_ordinates(i+1);
logmile:=rec.geom.sdo_ordinates(i+2);
dbms_output.put_line(id &#0124; &#0124; ',' &#0124; &#0124; longitude &#0124; &#0124; ',' &#0124; &#0124; latitude &#0124; &#0124; ',' &#0124; &#0124; logmile);
i := i + 3;
end loop;
END LOOP;
commit;
END;
Dave