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paleo_outline is available from NCL version 4.2.0.a018

Note that if your longitudes are -180 to 180, you should use lonFlip to put them into 0-360 mode. This is the only mode that paleo_outline accepts.
paleo_1.ncl: Takes advantage of land being set the missing to plot the land as the mask used by the ocean model. Since there are no continental outlines for the earth during this period, this is handy.

cnFillOn = True, Turns on the color fill.

mpFillOn = False, Turns off the gray continents.

mpCenterLonF = 180, Centers the plot at 180 vice 0.
paleo_2.ncl: An atmospheric example which uses paleo_outline to create the continental boundaries.

paleo_outline generates two files called "filename.lines", and "filename.names". With two resources, we will tell NCL to use these files instead of the standard modern-day continental boundaries.

mpDataBaseVersion = "Ncarg4_1", Tells NCL not use use the standard data base, and
the mpDataSetName = "./filename" resource, tells NCL the path to and name of your data base. In this case the data bases are in the same directory as the NCL script. You may want to consider storing these databases in a special directory.
paleo_3.ncl: A polar plot
paleo_4.ncl: A color paleo atmospheric plot.

The line thickness in this example was increased by
mpGeophysicalLineThicknessF = 1.5 to really emphasize the continental boundaries.
paleo_5.ncl An example of a paleo vector plot.