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19991107: proj,garea
- Subject: 19991107: proj,garea
- Date: Mon, 08 Nov 1999 09:29:26 -0700
>From: Matt Fearon <address@hidden>
>Organization: Desert Research Institute
>Keywords: 199911072325.QAA10931
>Hi Steve,
>
>I am trying to use gempak to output model data that has
>uniform grid spacing; having same latitude and longitude
>spacing throughout. Seems like the settings in proj and
>garea w/in the gdlist program should be able to perform
>this ? I was attempting to do this with proj set to
>lea (Lambert Equal Area), but I think the angles I was
>using were incorrect. Any suggestions you may have
>would be great.
>
>Thank you,
>Matt Fearon
>address@hidden
>
Matt,
If your grid has latitudes equally spaced and longitudes equally spaced,
then this is a CED (Cylindrical equidistant) projection grid. Set PROJ=CED.
The lambert projection is a connical projection.
If you data is a CED projection, then if you display it on a CED projection
map, then the rows and columns will look rectangular.
Similarly, the LCC grids like the eta 211 look rectangular when plotted
on a LCC map, but the rows and columns curve on a different projection.
Steve Chiswell
