lat2d = f->TLAT
lon2d = f->TLONG
t@lon2d = lon2d
t@lat2d = lat2d
POP Scalars
As of NCL version 4.2.0.a025, pop data that has 2D lat/lon coordinates
can be plotted directly in physical space. To do this, simply read in
the two dimensional arrays containing the grid point coordinates and
assign the arrays to the variable to be plotted as attributes with
the specific names lon2d and lat2d:
popscal_2.ncl: Shades values less
than five.
ShadeLtContour will shade values less than 5. Note: ShadeLtContour has been superceded by the more versatile gsn_contour_shade. We recommend you use this instead.
There are many other contour effects to play with.
popscal_3.ncl: Creates a color plot
The color fill example page is a good resource for learning about color plots.
popscal_4.ncl: Shows how to draw
vectors over scalars on another projection.
You are not limited to cylindrical equidistant projections. There are
several to choose from.
This is an orthographic projection. If you wish to view a CE projection, gsn_csm_vector_scalar_map_ce is the function to use: Example.
popscal_5.ncl: Demonstrates
how to overlay contours on a contour/map plot.
Note that there is a bug in NCL that requires us to provide a slightly different way of doing things.