Re: NCEP stageIV grib data plot

Dennis,

Is ftp://ftp.caps.ou.edu/users/yli/precip-ncep-stageIV.pdf perfect?

Thanks.

Yongzuo

From: Dennis Shea [shea@ucar.edu]

Sent: Thursday, January 14, 2010 12:00 PM

To: Li, Yongzuo

Cc: ncl-talk@ucar.edu

Subject: Re: NCEP stageIV grib data plot

You have set

res@tfDoNDCOverlay = True ; no map transformation

Unless you are plotting the whole region,

I suggest not using this resource. See

http://www.cgd.ucar.edu/~shea/NCEP-st4.ncl

You can do a Unix diff to see the suggested changes

%> diff ncep-st4.ncl NCEP-st4.ncl

On 01/14/2010 10:09 AM, Li, Yongzuo wrote:

<!--
p
{margin-top:0;
margin-bottom:0}
-->
BODY {direction: ltr;font-family: Tahoma;color: #000000;font-size: 13px;}P {margin-top:0;margin-bottom:0;}Dennis,

I made an almost perfect plot

ftp://ftp.caps.ou.edu/users/yli/precip-ncep-stageIV.pdf

using

ftp://ftp.caps.ou.edu/users/yli/ncep-st4.ncl

with

ftp://ftp.caps.ou.edu/users/yli/ST4.2008091307.01h.grib

Questions:

(1) Is my "ZOOM" method good?

(2) The map tilts to right because the center longitude

is -105

res@mpProjection = "Stereographic"

res@mpLimitMode = "Corners"

res@mpCenterLonF = lat2d@Lov

res@mpCenterLatF = 90.

(3) What does lat2d@Lov, the reference longitude, come?

Yongzuo

________________________________________

From: Dennis Shea [shea@ucar.edu]

Sent: Thursday, January 14, 2010 8:54 AM

To: Li, Yongzuo

Cc:
ncl-talk@ucar.edu

Subject: Re: NCEP stageIV grib data plot

If you did a

%> ncl_filedump ST4.2008091307.01h.grib

you would see that when NCL reads the grib file it

adds the long_name anf units attributes.

prc = a->A_PCP_GDS5_SFC_acc1h

delete(prc@long_name)

delete(prc@units)

Given your plot, maybe

"NCEP stageIV 1-h precip valid 20080913_"+HH

delete(prc@long_name)

delete(prc@units)

res@gsnCenterString = "1-h precip (mm)"

see gsnCenterString resources at:

http://www.ncl.ucar.edu/Document/Graphics/Resources/gsn.shtml

====

If you want to add a label to the label bar, see

http://www.ncl.ucar.edu/Applications/labelbar.shtml

Example 4

Good Luck

Li, Yongzuo wrote:

> Hi,

>

> I use

>

>
ftp://ftp.caps.ou.edu/users/yli/ncep-st4.ncl

>

> to make

>

>
ftp://ftp.caps.ou.edu/users/yli/precip-ncep-stageIV.pdf

>

> How can I remove "Total precipitation" and add description to color bar?

>

> I want to add subtitle.

>

> Thanks

>

> Yongzuo

>

>

> ------------------------------------------------------------------------

>

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--
======================================================
Dennis J. Shea tel: 303-497-1361 |
P.O. Box 3000 fax: 303-497-1333 |
Climate Analysis Section |
Climate & Global Dynamics Div. |
National Center for Atmospheric Research |
Boulder, CO 80307 |
USA email: shea 'at' ucar.edu |
======================================================

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Received on Thu Jan 14 11:29:11 2010