On 12-10-07 10:02 PM, Nikhil Sai Parupalli wrote:
Frank,
As said I have my system variable as
"RETURN_PRIMITIVES=ON,RETURN_LINKAGES=ON,LNAM_REFS=ON,
UPDATES=APPLY,SPLIT_MULTIPOINT=ON,ADD_SOUNDG_DEPTH=ON"
but still I couldn't see TOPI field retrieved in my dataset..
Will you elaborate and let me know.
Nikhil,
I don't know why you don't see it. I see it fine on the "Edge"
layer which contains the linestring vector objects.
eg.
OGRFeature(Edge):18
RCNM (Integer) = 130
RCID (Integer) = 19
RVER (Integer) = 1
RUIN (Integer) = 1
NAME_RCNM_0 (Integer) = 120
NAME_RCID_0 (Integer) = 21
ORNT_0 (Integer) = 255
USAG_0 (Integer) = 255
TOPI_0 (Integer) = 1
MASK_0 (Integer) = 255
NAME_RCNM_1 (Integer) = 120
NAME_RCID_1 (Integer) = 20
ORNT_1 (Integer) = 255
USAG_1 (Integer) = 255
TOPI_1 (Integer) = 2
MASK_1 (Integer) = 255
LINESTRING (60.775 -32.6249972)
I have one more question:
How do we find area outer boundaries are encoded clockwise based
on Orientation or USAG.
here when I retrieve S57 dataset I get multiple ORNT values for a single object.
I am not aware of any definition of outer ring winding direction.
I think the ORNT field values you see on polygons are indicating
which direction the edges were used in when composing the ring(s)
of the polygon.
NAME_RCNM (IntegerList) = (7:130,130,130,130,130,130,130)
NAME_RCID (IntegerList) = (7:691,391,690,52,1336,1503,1512)
ORNT (IntegerList) = (7:2,2,2,2,1,1,1)
USAG (IntegerList) = (7:1,1,1,1,1,1,1)
MASK (IntegerList) = (7:255,255,255,255,255,255,255)
So in the above feature, RCID 691 is used with orientation "2",
usage "1" and mask "255".
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, [email protected]
light and sound - activate the windows | http://home.gdal.org/warmerda
and watch the world go round - Rush | Geospatial Software Developer
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