John,
1. Display the grid in it's natural projection and draw the polygon outline
on the map.
2. Select the group that contains the polygon and copy it to the clipboard.
3. In the map in the other projection, past the polygon into the data view
using the "Edit/Paste georeferenced" option.
The polygon will be reprojected by the paste. This technique can be used to
reproject just about anything between maps in different projections.
Regards,
_______________
Geosoft Inc.
Ian MacLeod
[EMAIL PROTECTED]
(416) 369 0111 x323
Geosoft: Making the Digital Earth Work for You
http://www.geosoft.com
-----Original Message-----
From: Dehls John [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, April 11, 2000 10:30 AM
To: '[EMAIL PROTECTED]'
Subject: RE: [geonet]: polygons from grids
Thanks Ben and others. Unfortunatly if your map is reprojected, the poly
doesn't plot properly. Now I just have to figure out how to reproject .ply
files. Probably have to use ArcInfo.
John
> -----Original Message-----
> From: Ben Spurgeon [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, April 11, 2000 3:00 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [geonet]: polygons from grids
>
>
> John,
>
> The GX you are looking for is called GRID2PLY and is part of the basic
> gridding package in OASIS montaj v4.3. As the name suggests,
> you can either
> write the grid outline coords to a PLY file or plot the grid outline
> directly onto a current map.
>
> I hope this helps.
>
> Ben...
> ---
> Ben Spurgeon
> Geophysicist, Technical Services
>
> Geosoft Europe Limited
> [EMAIL PROTECTED]
>
>
>
> ----- Original Message -----
> From: Dehls John <[EMAIL PROTECTED]>
> To: 'geonet' <[EMAIL PROTECTED]>
> Sent: Tuesday, April 11, 2000 2:04 PM
> Subject: [geonet]: polygons from grids
>
>
> Does anyone have a gx/script to create polygon outlines of
> grids? I don't
> mean the entire rectangle, but rather the non-null areas. Any
> suggestions as
> to how I might go about creating such a script myself would
> also be welcome.
>
> John
>
> Dr. John F. Dehls
> Geological Survey of Norway
> N-7491 Trondheim
> +47 73 90 44 54
> +47 73 92 16 20 (fax)
>
>
>
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