Dear M.Mahakur, <br><br>Thank you, The picture looks very good. <br>The radii influence value I set is 8, and it displayed normally.<br>Thank you for your time, you are so kind hearted.<br><br>Best wishes.<br><div class="gmail_quote">
2009/6/1 M.Mahakur <span dir="ltr"><<a href="mailto:mmahakur@tropmet.res.in">mmahakur@tropmet.res.in</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello,<br>
<br>
Yes, for station data the default display domain is global. The small lines are due to<br>
exitance undef grid boxes. That is due to no. of stations not well distributed or less.<br>
You can try starting with 2-3 large scan radii, and many small radii later to have the<br>
fine structures, check if plot is ok after that. you can use smth9(oacres(....)) also<br>
for a smooth plot (using the 9-point smoother)..<br>
<br>
With Regards,<br>
<br>
--<br>
M. Mahakur<br>
Forecasting Research Division<br>
INDIAN INSTITUTE OF TROPICAL METEOROLOGY<br>
(Ministry of Earth Sciences, Govt. of India)<br>
Dr. Homi Bhabha Road, NCL Post, Pashan<br>
PUNE - 411 008, INDIA<br>
<div class="im"><br>
<br>
---------- Original Message -----------<br>
From: sh zhou <<a href="mailto:sh.maeam@GMAIL.COM">sh.maeam@GMAIL.COM</a>><br>
To: <a href="mailto:GRADSUSR@LIST.CINECA.IT">GRADSUSR@LIST.CINECA.IT</a><br>
</div><div><div></div><div class="h5">Sent: Mon, 1 Jun 2009 22:57:50 +0800<br>
Subject: Re: station map<br>
<br>
> Dear, M. Mahakur,<br>
><br>
> Thank you for your time and replay.<br>
> Yes, as you said, the resolution I set is too high, and I made a mistake at<br>
> the same time when set the area location, that the stations' location are<br>
> out of " background grid".<br>
> The radii of influence should be set between "0" and "50", my Grads version<br>
> is 1.8sl11, maybe in other versions are different values.<br>
> Now, I had set background grid data like this:<br>
> ###<br>
> xdef 350 linear 104.61 0.0450<br>
> ydef 250 linear 21.98 0.0450<br>
> ###<br>
> then the display seems much better now, but there are so many small lines<br>
> appeared, why does those small lines appear?<br>
> In this web page " <a href="http://www.iges.org/grads/gadoc/users.html" target="_blank">http://www.iges.org/grads/gadoc/users.html</a>" ( my manual<br>
> ), I haven't found the reason, If you know, could you tell me?<br>
> By the way, in my first step, when display station data, the background is<br>
> the whole word, is that default display?<br>
><br>
> Thank you for your time.<br>
><br>
> Sincerely.<br>
><br>
> 2009/6/1 M.Mahakur <<a href="mailto:mmahakur@tropmet.res.in">mmahakur@tropmet.res.in</a>><br>
><br>
> > Hello,<br>
> ><br>
> > How many stations do you have to inerpolate to such a hi resolution map<br>
> > (0.05 x 0.01)?<br>
> > Try with several scan radii, starting from a bigger for example (I guess<br>
> > there is limit<br>
> > to nos. of radii and minimum value of radii, see if 0.01 is allowed,<br>
> > although I have<br>
> > written!!):<br>
> ><br>
> > qq=oacres(r,rain.2, 5,4,2,1,0.5,0.3<br>
> > ,0.1,0.08,0.06,0.05,0.04,0.03,0.02,0.01)<br>
> ><br>
> > Default radii are 10,7,4,2,1<br>
> ><br>
> > <a href="http://www.iges.org/grads/gadoc/gradfuncoacres.html" target="_blank">http://www.iges.org/grads/gadoc/gradfuncoacres.html</a><br>
> ><br>
> > --<br>
> > M. Mahakur<br>
> ><br>
> > ---------- Original Message -----------<br>
> > From: sh zhou <<a href="mailto:sh.maeam@GMAIL.COM">sh.maeam@GMAIL.COM</a>><br>
> > To: <a href="mailto:GRADSUSR@LIST.CINECA.IT">GRADSUSR@LIST.CINECA.IT</a><br>
> > Sent: Mon, 1 Jun 2009 20:49:19 +0800<br>
> > Subject: station map<br>
> ><br>
> > > Dear All,<br>
> > ><br>
> > > I want to draw a station map, firstly, I created a binary file, and<br>
> > wrote a<br>
> > > "ctl" file as following:<br>
> > > ###<br>
> > > dset st_data.dat<br>
> > > title station data<br>
> > > dtype station<br>
> > > stnmap station_data.map<br>
> > > undef -999.9<br>
> > > tdef 1 linear 24May2008 7dy<br>
> > > vars 1<br>
> > > rain 0 99 rain data<br>
> > > endvars<br>
> > > ###<br>
> > > but the picture's background is the whole world( there is a picture in<br>
> > > attachment), and stations values displayed in a small area, when I added<br>
> > > "xdef,yedf,zdef" like this:<br>
> > ><br>
> > > ###<br>
> > > ...<br>
> > > undef -999.9<br>
> > > xdef 100 linear 100.0 0.05<br>
> > > ydef 100 linear 20.0 0.01<br>
> > > zdef 1 linear 1000.0<br>
> > > tdef 1 linear 24May2008 7dy<br>
> > > ...<br>
> > > ###<br>
> > > however, the background didn't change, Does "xdef" and "ydef"'s range<br>
> > set<br>
> > > by default as following?<br>
> > > ###<br>
> > > ga-> open station.ctl<br>
> > > Scanning description file: station.ctl<br>
> > > Data file st_data.dat is open as file 1<br>
> > > LON set to 0 360<br>
> > > LAT set to -90 90<br>
> > > LEV set to 500 500<br>
> > > Time values set: 2008:5:24:0 2008:5:24:0<br>
> > > ga-> q file<br>
> > > ###<br>
> > ><br>
> > > Secondly, I created a background grid file, and I used it to display<br>
> > station<br>
> > > values, but I got a error when used command " oacres", the following<br>
> > steps<br>
> > > is what I did.<br>
> > ><br>
> > > ###<br>
> > > ga-> open grid.ctl<br>
> > > Scanning description file: grid.ctl<br>
> > > Data file grid.dat is open as file 1<br>
> > > LON set to 99 106.45<br>
> > > LAT set to 19 20.49<br>
> > > LEV set to 1000 1000<br>
> > > Time values set: 2008:5:24:0 2008:5:24:0<br>
> > > ga-> open station.ctl<br>
> > > Scanning description file: station.ctl<br>
> > > Data file st_data.dat is open as file 2<br>
> > > ga-> define qq=oacres(r,rain.2)<br>
> > > Warning from OACRES: Less than two stations<br>
> > > Grid will be all missing values<br>
> > > Define memory allocation size = 90000 bytes<br>
> > > ga-> d qq<br>
> > > Cannot contour grid - all undefined values<br>
> > > ###<br>
> > > according to the error message:"Warning from OACRES: Less than two<br>
> > stations"<br>
> > > , and it occupied so much memory , it seems there are some mistakes in<br>
> > the<br>
> > > first step, am I right? if yes, could you tell me what should I do ? and<br>
> > is<br>
> > > there any problem in my steps?<br>
> > ><br>
> > > Thank you.<br>
> > ><br>
> > > Sincerely.<br>
> > ><br>
> > > --<br>
> > ><br>
> > > Shenghui Student<br>
> > ><br>
> > > HuNan University . China<br>
> > ------- End of Original Message -------<br>
> ><br>
><br>
> --<br>
><br>
> Shenghui Student<br>
> Major: Physics<br>
> HuNan University China<br>
</div></div>------- End of Original Message -------<br>
<br>
</blockquote></div><br><br clear="all"><br>-- <br><br>Shenghui Student<br>Major: Physics<br>HuNan University China<br>