Thanks Jeff - the first option was indeed my solution in the past - when I
didnt mind changing the base data. However, this is not possible now. I
may have to try the second option.
On further investigation it seems the fact that I'm storing data in Oracle8i
may also cause error as well especially as to the precision stored in the
database as compared to the display/ numeric coordsys being used by the map.
I think this is one for whoever may have come across this, some one at
MapInfo perhaps??
Dave Troughear
Technical Consultant
~~~~~~~~~~~~~~~~~~~~
Informed Solutions Ltd
The Old Bank
Old Market Place
Altrincham
Cheshire
WA14 4PA
+44 161 942 2000 (phone)
+44 161 942 2025 (fax)
http:\\www.informed.co.uk
"The opinions expressed here are mine and mine alone. They may not
represent those of Informed Solutions, its associates or clients."
> ----------
> From: Jeff James[SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, February 08, 2000 4:55 PM
> To: 'Troughear, David'; 'mapinfo-l@lists. csn. net' (E-mail)
> Subject: RE: MI Precision in MapX
>
> David,
>
> I think you'll always run into trouble here unless you do one of two
> things:
>
> 1. You could add a node to the line where the intersect point is.
> 2. Instead of creating an intersect point, create an intersect line,
> perpendicular to the line you're trying to intersect.
>
> This is not to say there aren't other solutions. I'm sure others will
> have
> some creative ones. I think, if I could though, I'd try the first method.
> It's probably the most sure way to do it.
>
> Good luck,
>
> Jeff James
> Vice President
> Sage Software, Inc.
> 3423 Piedmont Road NE
> Suite 550
> Atlanta, Georgia 30305
> Phone: 404.262.7478 Ext. 12
> Fax: 404.832.3366
> eFax: 520.222.2020
> www.sagesoft.com <http://www.sagesoft.com>
>
>
> -----Original Message-----
> From: Troughear, David [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, February 08, 2000 10:31 AM
> To: 'mapinfo-l@lists. csn. net' (E-mail)
> Subject: MI Precision in MapX
>
>
> Hi, can anyone out there answer the following question??
>
>
> I am using MapX to perform some editing - and in fact calculate the where
> a
> point (mouse-click) should intersect a given line feature. I am able to
> calculate the intersect of this line. However, when I zoom into the map
> to
> about 1 meter, the point of intersection does not fall on the line
> feature.
>
> I can only conclude this is to do with MapInfo's Precision , calculations.
> I try resetting the bounds of the numeric coordinate system (I'm using BNG
> by the way, and the distance is in meters). This is to no avail. The
> point of intersection is less than a meter out. The problem is that when
> displayed at close range the point of intersection is out, and if I test
> for
> an intersection of any feature within the area of the point of
> intersection
> then obviously it fails.
>
> Can anyone help me with this as this has not only been an issue in MapX
> but
> also in MapInfo as well. This would help me a great deal. Has anybody
> found similar problems and got a solution or could suggest one???
>
>
>
> Thanks.
>
>
>
> Dave Troughear
> Technical Consultant
>
> ~~~~~~~~~~~~~~~~~~~~
> Informed Solutions Ltd
> The Old Bank
> Old Market Place
> Altrincham
> Cheshire
> WA14 4PA
> +44 161 942 2000 (phone)
> +44 161 942 2025 (fax)
> http:\\www.informed.co.uk
> "The opinions expressed here are mine and mine alone. They may not
> represent those of Informed Solutions, its associates or clients."
>
>
>
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