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20031020: GEMPAK questions



Tim,

If you can put your data into a surface format similar to what SFLIST
produces, then SFEDIT will create a gempak surface file from your
ascii data.

The tutorial page:
http://my.unidata.ucar.edu/content/software/gempak/tutorial/importing_exercises.html
shows an example of a way to create an ascii formated data file and station 
table.

If your 1300 sites are fixed locations, then creating a standard surface file 
is the easiest route since you will only have to create a station table once.
For mobile locations, then you would have to have SLAT and SLON in every record 
and
create a ship format surface file.

You will need to assign a unique 4 to 8 character station ID for each site
(this can be as simple as a counter as shown in the example).

More information on the station table location format is shown here:
http://my.unidata.ucar.edu/content/software/gempak/tutorial/station_tables.html

Information on SFLIST is here:
http://my.unidata.ucar.edu/content/software/gempak/tutorial/sflist.html
and SFEDIT here:
http://my.unidata.ucar.edu/content/software/gempak/tutorial/manual/programs/chap4.php?prog=sfedit

you will have to create an empty surface file using a station table using SFCFIL
http://my.unidata.ucar.edu/content/software/gempak/tutorial/manual/programs/chap4.php?prog=sfcfil
before running SFEDIT.

Steve Chiswell





>From: "Critter Consulting" <address@hidden>
>Organization: Critter Consulting
>Keywords: 200310202204.h9KM43Ob024326

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>Hi,
> 
>            I'm new at using Gempak.  We want to plot some air quality
>data (hourly surface ozone concentration) at 1300 sites throughout the
>U.S.  
> 
>            If I understand Gempak we need to get the data converted to
>a .gem file and then it could be plotted with a program like GARP or
>NMAP2.
> 
>            How to I get this air quality data (which is in a CSV
>formatted file) into a .gem file?
> 
>            Do you now of generic decoders for non-weather data?
> 
>            Can I write my own program?
> 
>Thanks for you help on this issue.
> 
>Regards,
> 
>Tim Dye
>(707) 665-9900
> 
>
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><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'>Hi,<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><span =
>style=3D'mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
>;&nbsp;&nbsp;&nbsp; </span>I&#8217;m
>new at using <span class=3DSpellE>Gempak</span>.<span
>style=3D'mso-spacerun:yes'>&nbsp; </span>We want to plot some air =
>quality data
>(hourly surface ozone concentration) at 1300 sites throughout the =
></span></font><st1:country-region><st1:place><font
>  size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;font-family:Arial'>U.S.</span></font></st1:plac=
>e></st1:country-region><font
>size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;font-family:Arial'><span
>style=3D'mso-spacerun:yes'>&nbsp; </span><o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><span =
>style=3D'mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
>;&nbsp;&nbsp;&nbsp; </span>If
>I understand <span class=3DSpellE>Gempak</span> we need to get the data =
>converted
>to a .gem file and then it could be plotted with a program like GARP or =
>NMAP2.<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><span =
>style=3D'mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
>;&nbsp;&nbsp;&nbsp; </span>How
>to I get this air quality data (which is in a CSV formatted file) into a =
>.gem
>file?<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><span =
>style=3D'mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
>;&nbsp;&nbsp;&nbsp; </span>Do
>you now of generic decoders for non-weather =
>data?<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><span =
>style=3D'mso-tab-count:1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp=
>;&nbsp;&nbsp;&nbsp; </span>Can
>I write my own program?<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'>Thanks for you help on this =
>issue.<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'>Regards,<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'><o:p>&nbsp;</o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'>Tim Dye<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
>font-family:Arial'>(707) 665-9900<o:p></o:p></span></font></p>
>
><p class=3DMsoNormal><font size=3D2 face=3DArial><span =
>style=3D'font-size:10.0pt;
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>
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