Hi David

First you must download the two DOS Text File Grids (data and header). Look
into the Header file to see the grid parameters. Then just use the script
file below


/-------------------------------------------------------------------------
/ LOG OPENED : Thu Jul 20 17:34:26 2000
/-------------------------------------------------------------------------
SETINI         READASCIIGRID.ASCII=".\\*.dat"
SETINI         READASCIIGRID.GRID=".\\temp.grd(GRD)"
SETINI         READASCIIGRID.SKIP="0"
SETINI         READASCIIGRID.POINTS="#_Col"
SETINI         READASCIIGRID.ROWS="#_Row"
SETINI         READASCIIGRID.KX="-1"
SETINI         READASCIIGRID.DUMMY="-500"
SETINI         READASCIIGRID.DX=".00833333333"
SETINI         READASCIIGRID.DY=".00833333333"
SETINI         READASCIIGRID.X0="Left_map_X"
SETINI         READASCIIGRID.Y0="Upper_map_Y"
SETINI         READASCIIGRID.ROT="0"
INTERACTIVE    ON
GX             readasciigrid.gx
/-------------------------------------------------------------------------
SETINI         REGRID.IN=".\\temp.grd(GRD)"
SETINI         REGRID.OUT=".\\*.grd(GRD)"
SETINI         REGRID.CELL=""
SETINI         REGRID.EDGECELL="0"
SETINI         REGRID.LOW_PASS=""
SETINI         REGRID.HIGH_PASS=""
SETINI         REGRID.NL_TOL=""
SETINI         REGRID.SPLINE="1"
SETINI         REGRID.GAP=""
INTERACTIVE    ON
GX             regrid.gx
/-------------------------------------------------------------------------
/ LOG CLOSED : Thu Jul 20 19:01:24 2000
/-------------------------------------------------------------------------


Regards

Cesar and Albary from Lasa

David Triggs wrote:

> Hi List,
>
> Has anyone used Montaj to open and read a GTOPO 30 grid? I have
> downloaded a grid from the USGS and so far have only been able to see
> lines across the map but no coherent data. I was wondering if anyone
> else had come across this problem and if they have been able to solve
> it.
>
> Thanks
>
> David
>
> _______________________________________________________
> More mailing list info http://www.geosoft.com/support/listserv/index.html
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url:www.netrio.com.br/users/marinho
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