> -----Original Message-----
> I've been trying to join the borders of one polygon with another using the
> node editor tool. When I specify a tolerance of 5 pixels the nodes appear
> to snap to the corresponding nodes in the bordering polygon however, when
I
> zoon in the nodes are not snapped. I have to progressively zoom in and
> re-edit before the nodes coorectly snap. Is this a bug in MapInfos
editing
> capabilities? Is there a way arround this?
Jeff,
I think you have there a typical situation where the "native" MI resources
are very limited, i.e. editing maps for eliminating internal "errors". There
are several third party utilities at a noticeable cost to do that.
As a way around?... Snapping is operative only while "moving" (or creating)
nodes. Just setting a tolerance level does not snap existing nodes to each
other within that limit. Zoom level will only show more distinctly the
non-coincidental nodes and there is no way to identify visually "snapped"
nodes from "not-snapped" ones. You have to move each node away from its
original position and back to its "neighbor" position to be sure that it is
snapped to it.
The trick is to find a way to locate the nodes that have to be re-snapped so
that you do not have to go through each one. I often use the "combine" of
two adjacent polygons to check visually if there is any "trace" along their
common border, or to find out the number of polygons in the combined region.
That may help me to locate the nodes that would be "apart" form each other
leaving a gap between the original regions. Then, ther is the problem of the
overlapping nodes; sometimes, the "intersect" can help in the same manner as
the combine.
All that to say that there is no simple way around if you cannot afford
those editing tools. Even a free utility like MapCheck will not do the job
for you; it may identify some problem areas (and may be not all), but you
will have to do the "repairs" youself.
I expect you will have many answers because your question is a deep concern
to many of us.
Jacques Paris
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gis activity (MapInfo mainly)
http://www.total.net/~rparis/gisproducts.htm
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