spatialSQL (www.acenet.com.au/~pwaight/spatialsql.htm) will locate dead-ends
and snap unintended line ends to the road network.
The logic is that the "free ends" operator without an update operator
locates ends outside the tolerance (legitimate dead ends). If the tolerance
is zero, it will also locate dangle line ends.
"Free ends" with a snap update locates ends within the tolerance and snaps
to the network, optionally splitting the snapped-to line at the connect
point.
Similar approach with points and a line network.
Regards.
_______________________________________
SPATIAL PROJECTS
Ph (61)02 48617977
0418 647697
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Web: www.acenet.com.au/~pwaight
----- Original Message -----
From: "Selves, Simon" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, October 26, 2004 6:18 PM
Subject: MI-L Dead-ends and dangles
Hi All,
Does anyone have any idea how to isolate/select "Dead_ends" (i.e.
Cul-de-sacs etc.) in a road network, in Mapinfo? I've tried all sorts of
queries, but cannot seem to select either the dead-ends or their inverse.
I'm also trying to construct a spatial query to select line objects that are
not connected to a continuous network i.e. hanging road segments. Anyone
with any ideas?
I have a basic knowledge of Mapbasic so am not adverse to running some
scripts if necessary.
Much obliged for your time.
Simon
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