Bonjour,
I'll have a look to see if I can do something for it in the next release.
I suspect that might be caused by data resolution. Lat and Lon are stored in
decimal degrees with 7 digits precision (48.1234567). The 7th digit will
provide a precision around 0.001 meter. The 6th digit a
the south east corner of 021O10.0 is at 47.534 by -66.7500013
the north east corner of 021O07.1 (should be exact same node), is at
47.500 by -66.750
the exact offset differs from corner to corner, some are off more then
others, some are off in a different direction
On 01/31/2012
I've seen some of these deviations as well during Canvec import. Because
they are so small ( 1 meter), I just decided to glue the polygons
together, so any slivers are gone.
It is inconvenient though. Could it be related to that some sheets were
originally still in NAD27, instead of NAD83
Bonjour Frank,
The problem is not related to a NAD27-NAD83 conversion. With Michael's example,
I am now sure that the problem is related to the quadtree clipper. I must find
a way to round quadtree's tiles coordinates to a proper value.
Thanks to Michael
Best regard,
Daniel
-Original
4 matches
Mail list logo
