Peter Horsbøll Møller
GIS Developer, MTM
Geographical
Information & IT
COWI A/S
Odensevej
95
DK-5260 Odense S.
Denmark
Tel +45 6311 4900
Direct +45 6311 4908
Mob +45 5156 1045
Fax +45 6311 4949
E-mail [EMAIL PROTECTED]
http://www.cowi.dk/gis
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ronning, Christine
Sent: Wednesday, June 21, 2006 10:53 PM
To: MapInfo-L@lists.directionsmag.com
Subject: [MI-L] Wrong Subject on last one: Spatial Query
Hi all,
I have mapped a points layer.
I would
like to select those records where there is more than 10 points within a radius
of .5km.
I'm having trouble even starting on this one! Can anyone
provide some
guidance/thoughts?
Thanks
Christine
-----Original
Message-----
From: [EMAIL PROTECTED] on behalf of
Spencer Simpson
Sent: Wed 6/21/2006 11:34 AM
To: 'Alan Silvester';
mapinfo-l@lists.directionsmag.com
Subject: RE: [MI-L] Creating a line from a
series of points
I think we need to know a little more about the table,
such as:
1. Are there columns
specifying X and Y, or formulas, or a point object
you can derive X and Y
Coordinates from?
2. Is there a column
specifying the order that a point appears in
the
polyline?
3. Is there more than one
polyline? If so, is there a column specifying
which polyline a row belongs
to?
If so, then it's possible to write a MapBasic application to
chain the
points together. Some of the other listers may have even
written such
applications.
A.
Sort by (select statement with order by clause) polyline specifier
and order
specifier
B. Iterate through the result
table. For each record:
if the line specifier changed, finish the
current polyline (insert) and
start a new one with the coordinates from
current rec (Create Pline).
If not, add the coordinates from the current
rec to the end of the current
line. (Alter Object Add
Node)
C. At the end, finish the current
polyline.
Hope this
helps
Spencer
_____
From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]
On Behalf Of Alan
Silvester
Sent: Wednesday, June 21, 2006 11:30 AM
To:
mapinfo-l@lists.directionsmag.com
Subject: [MI-L] Creating a line from a
series of points
Dear All,
Does anybody know how
to automatically create a line from a series of
points, i.e. rather than
drawing a line from point to point, I want to be
able to make a line that
automatically joins up the points. The problem is,
is that the next point to
join up with the line may not be the next record
in the table?! The points
are however all 1km apart.
Does anyone have any
ideas?
Regards,
Alan
Alan
Silvester
GIS Manager
GroundSure Limited
Unit E, Level
7
New England House
Brighton
BN1 4GH
Tel: +44
(0)1273 819500 (Switchboard)
+44 (0)1273 647811
(Direct dial)
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