Error creating a simple polygon with lat/lon

Question

Hello,
When I validate the result of the following code used to insert a polygon, I get oracle error 13050 - Contact Oracle. If I change the order of the points, I get error 13349 - Polygon crosses itself, so I feel I have the points in the correct order. Any ideas why this polygon won't validate to true?
insert into tblname values(
(mdsys.sdo_geometry(2003,null,null,
mdsys.sdo_elem_info_array(1,1003,1),
mdsys.sdo_ordinate_array
(-89.228298,42.916663,
-89.344087,43.247025,
-89.016191,43.33739,
-88.912663,43.079601,
-89.02033,43.008463,
-89.228298,42.916663))
), field 2, 'field3')
Thanks for any thoughts,
David

Answer 1

Bruce,
I was attempting solve a business/spatial problem the wrong way, based on limited experinece with Oracle spatial.
I need to create a convex hull polygon from a splatering of points. (for sake of arguement, lets say the points are salesmans locations and there will be approx 2,000 salesmans locations. I need to create a convex hull of these 2000 points).
My initial thought was to use the points as input to making a polygon. I was then going to use this polygon as input to making the convex hull. In order to make a valid polygon to feed into the generation of the convex hull, the points have to be in such an order so there are no crossing lines and the polygon closes itself, when creating a polygon.
I have since been given the suggestion of using my ponits as input to making a linestring geometry, and then using this linestring geometry as input to creating a convex hull.
Hope this explains my thought process. Thanks for your input.
David
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