SDO_ORDINATE_ARRAY precision control

Dear all,

Greetings.

Hello.

I met a problem dealing with storing the geometry with correct values SDO_ORDINATES accuracy. When I download the geometries in Oracle, I had chosen FME (software does convert and automatically download data.) BUT when I export the ordinates of geometry to the other calculations or analysis programs, I found the details for each point of contact information is too many (I really useless that much, in addition, he has problems for floating numbers calculations.) For example, the lat/long value would be 10.0000000000000001 / 20.0000000000.

In the other program, I cut the data without these numbers a lot, but I also need to refer to the database, and there are already some lost data. I would like to have the data cut into the database once I have download the data in oracle. I can't find a feature or command so far, / of the FME or the documents of the oracle. Everyone knew this, please leave me your comments. Thanks in advance.

Kind regards
Jun

You can do it in FME using the [CoordinateRounder | http://docs.safe.com/fme/html/Transformers/content/transformers/coordinaterounder.htm] transformer.

There is no function available in planning to do, but its pretty simple to do. Here is an example of a function:

CREATE OR REPLACE Function Round_Coordinates(p_geometry IN MDSYS.SDO_GEOMETRY, p_tolerance IN NUMBER)
    RETURN MDSYS.SDO_GEOMETRY
    IS
     v_dim            number;
     v_gtype          number;
     v_geometry       mdsys.sdo_geometry := p_geometry;
     v_ordinates      mdsys.sdo_ordinate_array;
     v_round_factor number;
Begin

    v_gtype := Mod(p_geometry.sdo_gtype,10);
    v_dim :=  SUBSTR(p_geometry.sdo_gtype,1,1);
    v_ordinates := p_geometry.sdo_ordinates;            

    -- Compute rounding factors
    v_round_factor := round(log(10,(1/p_tolerance)/2));

    -- If point update differently to other shapes...
    IF ( v_geometry.sdo_point is not null ) Then
      v_geometry.sdo_point.X := round(v_geometry.sdo_point.x, v_round_factor);
      v_geometry.sdo_point.Y := round(v_geometry.sdo_point.y, v_round_factor);
      If v_dim > 2 Then
        v_geometry.sdo_point.z := round(v_geometry.sdo_point.z, v_round_factor);
      End If;
    END IF;

    IF ( v_gtype <> 1 ) THEN
         FOR i in v_ordinates.FIRST..v_ordinates.LAST LOOP
              v_ordinates(i) := round(v_ordinates(i), v_round_factor);
          END LOOP;
     END IF;

    RETURN mdsys.sdo_geometry(v_geometry.sdo_gtype,
                              v_geometry.sdo_srid,
                              v_geometry.sdo_point,
                              v_geometry.sdo_elem_info,
                              v_ordinates);
END Round_Coordinates;
/

Tags: Database

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Lucaro71 wrote:

Hello, I am new to hearing CS6. I have a Google Nexus 7 Tablet. I would use it for mixing...

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SDO_ORDINATE_ARRAY precision control

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