calculating mercator coordinates

From: Micah Sklut <micahs2005_at_nyahnyahspammersnyahnyah>
Date: Wed Apr 24 2013 - 14:42:11 MDT

Hi there,

I have a dataset that is from a mercator projection.
So, my usual routine to find the data coordinates of a particular lat/lon
don't exactly work, since the grid isn't equidistant.

Are there any NCL function that will calculate or convert lat/lon from
mercator data.

Example. lat 38.5, lon -100.
What coordinates in my dataset contains this point.
Lat/Lon attributes are below.

      float lat_0 ( lat_0 )
         long_name : latitude
         GridType : Mercator Projection Grid
         units : degrees_north
         Dj : 2.5
         Di : 2.5
         LaD : 20
         Lo2 : 297.491
         La2 : 22.005
         Lo1 : 284.5
         La1 : 15

      float lon_0 ( lon_0 )
         long_name : longitude
         grid_type : Mercator
         units : degrees_east
         Dj : 2.5
         Di : 2.5
         LaD : 20
         Lo2 : 297.491
         La2 : 22.005
         Lo1 : 284.5
         La1 : 15

Thank you,

-- 
Micah

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Received on Wed Apr 24 14:42:23 2013

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