Re: Can't generate output for dataset with single-point time axis

[Joe Sirott <sirott@xxxxxxxxxxxxx>]

Hi Joe,

I gave this a quick try and it worked for me. You might try omitting the 
time axis from the XML (since there is only one data point) as there was an 
earlier bug with one point time axes that might be in the release of LAS 
that you are using.

At 03:48 PM 11/19/2002 -0800, Joe Wielgosz wrote:
> Hi,
>
> I am investigating how to get GrADS running behind LAS.
>
> I loaded a dataset on my test system with only a single time to see what
> kind of XML the LAS UI would generate. However there is a problem - the
> time value being sent in the XML request is invalid.
>
> This is the dataset:
>
> http://monsoondata.org:9090/dods/gswp/grid/fixed/vegclass_bats.info
>
> The addXml script generates the following:
>
> <datasets>
>  <vegclass_bats
> url="http://monsoondata.org:9090/dods/gswp/grid/fixed/vegclass_bats";
> doc="" name="BATS cover classification interpolated to 1x1 degree">
>   <variables>
>    <vegclass name="landcover class ">
>     <link match="/lasdata/grids/vegclass_bats_time_lat_lon_grid"/>
>    </vegclass>
>   </variables>
>  </vegclass_bats>
> </datasets>
> <grids>
>  <vegclass_bats_time_lat_lon_grid>
>   <link match="/lasdata/axes/vegclass_bats_time"/>
>   <link match="/lasdata/axes/vegclass_bats_lat"/>
>   <link match="/lasdata/axes/vegclass_bats_lon"/>
>  </vegclass_bats_time_lat_lon_grid>
> </grids>
> <axes>
>  <vegclass_bats_time units="days" type="t">
>   <v>1982-Jul-01 00:00:00
>   </v>
>  </vegclass_bats_time>
>  <vegclass_bats_lat units="degrees_north" type="y">
>   <arange start="-59.5" step="1" size="150"/>
>  </vegclass_bats_lat>
>  <vegclass_bats_lon units="degrees_east" type="x">
>   <arange start="-179.5" step="1" size="360"/>
>  </vegclass_bats_lon>
> </axes>
>
> but when I generate a request, it comes out with the time set to Jan-16,
> like this:
>
> XML: <?xml version="1.0"?><lasRequest package="" href="file:las.xml"
> ><link match="/lasdata/operations/grads" /><properties ><ferret ><size
> >.5</size><format >grads</format></ferret></properties><args ><link
> match="/lasdata/datasets/vegclass_bats/variables/vegclass" /><region
> ><range low="18.0" type="x" high="70.0" /><range low="-1.0" type="y"
> high="66.0" /><point v="16-Jan" type="t" /></region></args></lasRequest>
> CACHE: true
>
> And even when I try to do a ferret plot i get this message:
>
> --
> Illegal Limits
>
> Sorry ...
>
>     There are no data available at 16-JAN      00:00
>     The data begin at 30-JUN-1982 12:00 and continue to 01-JUL-1982
> 12:00
>
> Please try again with a time that lies within this range.
> --
>
> I am unable to find where this time value is getting set in the servlet
> code. Please help..
>
> Thanks,
>
> - Joe
>
>
> --
> Joe Wielgosz / joew@cola.iges.org
> ---------------------------------------------------
> Center for Ocean-Land-Atmosphere Studies (COLA)
> Institute for Global Environment and Society (IGES)
> http://www.iges.org