HI All, , Thanks for the reply in below data
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) RCID 691 ORNT has 2 and USAG is 1 based on this data we could identify that RCID 691 is of exterior boundary with reverse direction. So if I have 1000 RCID in NAME_RCID which is vise versa for the above condition I need to display that RCIDS list as errors. So it makes 1000 conditional checks hence reducing performance. Please let us know further. 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, Thanks and Regards Nikhil Sai Parupalli Note: Do not print this email until and unless it is really required. Save paper , stay Green
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