> [mailto:[EMAIL PROTECTED]]On Behalf Of Nick Deagle
> Sent: 5 Feb 1999 3:02 PM
> Subject: MI CentroidX in projection coordinates
>
>
> Is there a way to get the centroidx() function to output in projection
> coordinates rather than reference coordinates (the manual states
> that projection coordinates will be used when the table is stored in
> units other than lat/long degrees, but from experience this doesn't
> happen). For example I'm using the update column function to get
> the centroid of points using a local projection. However, mapinfo
> stores the geographic position.
In the MapBasic window type and run before the update command
Set CoordSys table <your_table_name>
> Also is their a way to improve on the
> precision of the point. The program seems to only store information
> up to the 10000th of a degree.
The default precision is 1/1000000 of a degree (about 11 cm at the equator
or along a meridian). To increase your precision (i.e. the internal
precision with which MI stores the coordinates) get and read the files in
intprec2.zip on our site. It is an old subject and the text is still valid.
More recent is a chapter in "My Bag o'Tricks" also on our site.
Jacques Paris
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e-mail [EMAIL PROTECTED]
gis activity (MapInfo mainly)
http://www.total.net/~rparis/gisproducts.htm
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