[ncl-talk] Can't overlay maps on a NAM (native grid)

[Barry Lynn]

Hello:

I am trying to overlay the height field from the NAM on the relative
humidity.

I succeeded to zoom and project the NAM fields correctly, and I succeeded
to make two separate plots, both of which were projected correctly.

I consulted these two pages.

http://www.ncl.ucar.edu/Applications/Scripts/lcnative_2.ncl

and:

http://www.ncl.ucar.edu/Applications/Scripts/conOncon_2.ncl

I can create test.00001, and test.00002 using the attached ncl code.

However, I cannot create the overlay.

I try to do this using the last two lines of the code:

  overlay(contour_rh,contour_z)
  draw(contour_rh)


But, I get this error.

fatal:NhlAddOverlay: plot class mapPlotClass cannot be overlay plot member

If I try to change gsn_csm_contour_map to gsn_csm_contour to then invoke
the overlay procedure, I get:



warning:mpProjection is not a valid resource in test_contour at this time
warning:mpLimitMode is not a valid resource in test_contour at this time
warning:mpLeftCornerLonF is not a valid resource in test_contour at this
time
warning:mpRightCornerLonF is not a valid resource in test_contour at this
time
warning:mpLeftCornerLatF is not a valid resource in test_contour at this
time
warning:mpRightCornerLatF is not a valid resource in test_contour at this
time
warning:mpLambertMeridianF is not a valid resource in test_contour at this
time
warning:mpLambertParallel1F is not a valid resource in test_contour at this
time
warning:mpLambertParallel2F is not a valid resource in test_contour at this
time
warning:mpOutlineDrawOrder is not a valid resource in test_contour at this
time
warning:mpFillOn is not a valid resource in test_contour at this time
warning:mpOutlineBoundarySets is not a valid resource in test_contour at
this time
fatal:NhlAddOverlay: plot class mapPlotClass cannot be overlay plot member

and the projection is lost.

Your suggestions are appreciated.

Barry Lynn


-- 
Barry H. Lynn, Ph.D
Senior Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
http://weather-it-is.com
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
US 914 432 3108
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