Hi Steve,
The way to fix this problem is to export your non-earth table to mif/mid,
which preserves the coordinate values. Edit the header of the mif file and
replace the coordsys... line with the correct one for your projection, then
re-import the table.
As you've found, using Save As with the correct projection doesn't work in
the case of NEM tables.
Hope you haven't got too many to do - I ended up automating the procedure in
mapbasic after the first few hundred tables!
---------------------------------------------
David Booth
Senior GIS Officer
Merseyside Information Service
> -----Original Message-----
> From: Steve McCrone [SMTP:[EMAIL PROTECTED]]
> Sent: 04 September 2000 08:12
> To: [EMAIL PROTECTED]
> Subject: MI Converting Non-Earth N & E to a proper Projection N & E
>
> Hello Mappers:
> I have some vector (say polylines) data that was saved using:
>
> Non-Earth m, Bounds -1000000000, -1000000000, 1000000000, 10000000000.
> This was done since the PRJ file did not contain the appropriate
> projection parameters.
>
> The coordinates of the nodes of the plines are grid coordinates in the
> Rectified Skew Orthomorphic (RSO) projection. Therefore, when the user
> clicks the mouse on a feature, the correct E & N is displayed.
>
> The appropriate RSO projection parameters have been added to the PRJ file
> and now I wish to convert all of the existing data (in Non-Earth) to RSO.
>
> When I simply change the projection to RSO the data gets all messed up. I
> am able to write some Map Basic code that programmatically extracts the E
> & N from each node and stores them into an ASCII file. I then import these
> coordinates into MI and generate lines from the points. I also could write
> some MB code to create the new tables.
>
> Is there a simpler way of doing this? Perhaps without getting into MB
> programming at all. I am working in MapInfo 5.0 and MapBasic 4.1.2.
>
> Thanks
>
>
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