Hi David,
Concerning the problem with checking whether a point is within a region:
You can use the geographical operators without SQL. That is you might
ask if one object is within/intersects/contains another:
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**********
Dim oPoint, oRegion As Object
oPoint = CreatePoint(..)
Create Region Into Variable oRegion
....
'**Now check whether the region contains the point:
If oRegion contains oPoint Then
'**point is within region
Else
'**Point is NOT within region
End If
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**********
And in this way you are able of checking a lot of thing on your objects
without
having to save them to a table first and then use SQL.
And I do agree with you there seems to be a bug somewhere in MapBasic
concerning
the Error handling. I have also created a lot of object creating programs -
and of course
as a good programmer - added error handling to these function, because a
lot of things
might not go the way they were expected to do. Often my problem is that I
erase one object
with another. Somtimes the result is a not existing object and when I try
to nsert this object
into a table an error occures that is not handled proberly by the error
handling in my program.
Best regards,
Peter
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*
Peter Moller [EMAIL PROTECTED]
GIS-Developer Direct: +45 6313 5008
Kampsax Geoplan Voice: +45 6313 5013
Rugårdsvej 55 Faximile: +45 6313 5090
DK 5000 Odense C Web: www.mapinfo.dk
MapInfo Authorized Partner
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