controling colour station data according to defined range.

[Jennifer Faber]

Hi Erik (and the rest)

Sorry for the delay, but work has been busy!
Well I dont know exactly how the image was created because I found it on a
another website.
I personally think they applied a "dirty trick". I think they already made
ranges in the MOS stationdata (so before you use the STNmap utility) and
then create a ctl. model. In this way you create different files and open
one after the other and then you can adjust the colour. For each file that
you open you will get a "different" tmax: tmax, tmax.2, tmax.3, tmax.3 etc.
We havent tried this dirt trick yet, because we wanted to consult with the
GrADS users to see if there is a simple and fast solution. It would be great
if in the near future this this feature could be implemented into GrADS! It
really surprises me that with all the possibilities of GrADS this isnt
included....

Greetings,
Jennifer Faber



----- Original Message -----
From: "Eric Altshuler" <ela at COLA.IGES.ORG>
To: <GRADSUSR at LIST.CINECA.IT>
Sent: Tuesday, July 28, 2009 8:26 PM
Subject: Re: controling colour station data according to defined range.


> Hi Jennifer,
>
> In one of your previous messages, you sent a plot that shows colored
> temperature values. From what you've said, it seems that plot is a perfect
> example of what you want to do. How was that image created?
>
> Best regards,
>
> Eric L. Altshuler
> Assistant Research Scientist
> Center for Ocean-Land-Atmosphere Studies
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705-3106
> USA
>
> E-mail: ela at cola.iges.org
> Phone: (301) 902-1257
> Fax: (301) 595-9793
>
> ----- Original Message -----
> From: "Jennifer Faber" <j.faber at WEERONLINE.NL>
> To: GRADSUSR at LIST.CINECA.IT
> Sent: Tuesday, July 28, 2009 3:21:08 AM GMT -05:00 US/Canada Eastern
> Subject: Re: controling colour station data according to defined range.
>
>
> Hi Stephan (and other GrADS users)
>
> It seems like a good option when you are talking about 10 or 20 stations.
> But I want to produce maps that make use of hundreds of stations. Finding
> all coordinates and creating this function will be very time-consuming! I
> am starting to get the idea that it isnt possible in GrADS to color
> values, which suprises me because so much is possible with GrADS! Maybe a
> good idea to insert the option in a new version?! ;-)
>
> Greetings,
> Jennifer
>
>
>
>
> ----- Original Message -----
> From: Stephen R McMillan
> To: GRADSUSR at LIST.CINECA.IT
> Sent: Monday, July 27, 2009 5:53 AM
> Subject: Re: controling colour station data according to defined range.
>
> Jennifer,
> Have you considered using 'set strsiz...', 'set string...', and 'draw
> string...' to draw your values? You could create a function that draws the
> plotted parameters in value-dependent colors, using station x-y
> coordinates and wx parameter values as arguments. It may be more
> time-consuming but should do the trick. Perhaps someone else out there
> knows a more efficient way in GrADS,
>
> Note: I am on "vacation" so I may not respond to any follow-up
> questions/comments in a timely manner. Sorry--no sample script at this
> time.
>
> Good luck!
> Stephen McMillan
>
>
>        Jennifer Faber <j.faber at WEERONLINE.NL>
> Sent by: GRADSUSR at LIST.CINECA.IT
>
> 07/24/2009 02:16 AM
>
> Please respond to
> GRADSUSR at LIST.CINECA.IT
>
>
> To      GRADSUSR at LIST.CINECA.IT
>
> cc
>
> Subject         Re: controling colour station data according to defined
> range.
>
>
>
>
> Hi Jennifer (and rest)
>
> Thanks you for your fast reply! I never knew about this option. But
> unfortunately I dont wanna plot the parameters as dots that represents the
> station location. I want to plot parameters like temperature, rainfall,
> wind direction and speed measured by the station as values (not as dots)
> and control the colours of these parameters. If I "set gxout value" then I
> can plot the values but I cannot color the colors according to their
> value. Any new suggestions?? (I dont know if it is allowed, but I added a
> file as an example what I mean)
>
> Greetings,
> Jennifer Faber
> ----- Original Message -----
> From: Jennifer Adams
> To: GRADSUSR at LIST.CINECA.IT
> Sent: Thursday, July 23, 2009 5:24 PM
> Subject: Re: controling colour station data according to defined range.
>
> Use 'set gxout stnmark' and you'll get a colorized dot where the station
> location is. Then 'set clevs' and 'set ccols' and 'set digsiz' will allow
> you to control the colors and levels and size of the dots.
> --Jennifer
>
> On Jul 23, 2009, at 11:01 AM, Jennifer Faber wrote:
>
>
> Dear all,
>
> Problem: I am trying to plot MOS data in GrADS. This data is station data
> and we already created a numerical model and STNmap utility to read and
> draw into a grid. What I want to do is colour the parameters according to
> their values. In essence the same as what you can do for the contours
> (shaded or not) but now for gridvalues or stationdata.
>
> With Tmax as example we managed: to plot the Tmax of all stations (of MOS
> file) with gxout shaded using oacreas. Here we can manipulate the colours
> and the range.
>
> Now: We want to plot the value Tmax as value (not contour) and then colour
> the value according to a range. I cannot use clevs or ccols because that
> is only for contours. And I cannot use fgvals neither because then it will
> colour the entire grid and not the grid value. All I can do with the value
> is change digit, change size and colour them, BUT all in the SAME colours.
>
> I didnt include a script, because no script I tried, solved this problem.
> I hope you can help me. Thanks!
>
> Sincerely,
>
> MSc. Jennifer Faber
> Meteorologist Weeronline
>
> WeerOnline B.V.
> Waterstraat 11
> 6882 GA Velp
> Tel.: 026-3622111
> Fax: 026-3621699
> http://www.weeronline.nl
> http://pda.weeronline.nl
> mailto: j.faber at weeronline.nl
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org [attachment "example TMAX coloured.gif" deleted by
> Stephen R. McMillan/Planalytics]
>
>
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