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Hi Steve,
In general the stuff from behind the scene is keep away from the manual.
I would also have liked at more indepth manual.
>>Based on the user manual I thought
that as long as the projection of the grids was the same and that there was at
least partial overlap of the grids that a query would give a result....simple as
that!
This is correct. Also remember that
the units have to be same of all the grid. This could be your error. If you
forget to set the unit on grid creation you can do it in the Alter meta data
section.
>>I have other questions like
if two cells from two grids are not perfectly aligned how does Vertical Mapper
determine if the cells meet the query conditions.
I would like an answer on that one
too.
Jakob From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Steve Roso Sent: Thursday, July 06, 2006 9:49 AM To: mapinfo-l@lists.directionsmag.com Subject: [MI-L] Vertical Mapper Grid Queries Hi
Listers, I am a bit of a newby and not sure
if Vertical Mapper questions are allowed on this list but anyway here
goes... I am having a bit of grief with what
I thought were some simple grid queries (i.e. give me Grid C where Grid A = X
AND Grid B = Y). Sometimes it works for me and sometimes it doesn’t and I am
guessing that there is something critical about the order of the grids in the
“conditions” list relative to the order of the grids in the “grids” list. Also a
bit worried that maybe my grids must be perfectly
aligned. Based on the user manual I thought
that as long as the projection of the grids was the same and that there was at
least partial overlap of the grids that a query would give a result....simple as
that! Could someone tell me if there are
any obvious rules that I am missing OR if there is any documentation I could get
my hands on that is more thorough than the user manual. I have other questions
like if two cells from two grids are not perfectly aligned how does Vertical
Mapper determine if the cells meet the query conditions? Is it simply that their
centre points must lie within each other?. This seems a likely answer but a
newby like me would have liked to see it in the user
manual! Many thanks for your
help. Steve Roso
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