[thredds] Thredds Opendap request

• To: <thredds@xxxxxxxxxxxxxxxx>
• Subject: [thredds] Thredds Opendap request
• From: <Derrick.Wong@xxxxxxxx>
• Date: Wed, 21 Jul 2010 15:01:28 +0800

Hi all,

I have set up a TDS (Version 4.1.20100520.1554 - 20100520.1554) and I am having 
some problem requesting for data using the built-in OPeNDAP service.

I am trying to subset the dataset based on a spatial extent (bbox), and in the 
opendap documentation, it is mentioned that this is possible if you specify a 
constraint in your request. 
(http://opendap.org/user/guide-html/guide_34.html#id6)

I am getting the following error when I try to make a simple query 
http://apacsrv6/thredds/dodsC/bom/mslp.2009043000.nc.ascii?mslp&lat>15.0 :

Error {
    code = 2;
    message = "The variable `15' was not found in the dataset.";
};



My Dataset is as follows:

Dataset {
    Float32 lat[lat = 480];
    Float32 lon[lon = 600];
    Int32 tm_step_size;
    Int32 base_date;
    Int32 base_time;
    Int32 valid_date[time = 1];
    Int32 valid_time[time = 1];
    String seg_type[time = 1];
    Float32 mslp[time = 1][lat = 480][lon = 600];
} bom/mslp.2009043000.nc;
---------------------------------------------
lat[480]
-55.0, -54.875, -54.75, -54.625, .......

lon[600]
95.0, 95.125, 95.25, 95.375, 95.5, ......

tm_step_size, 240
base_date, 20090430
base_time, 0
valid_date[1]
20090430

valid_time[1]
0

seg_type[1]
"FORC"

mslp[1][480][600]

[0][0], 983.6426, 983.6654, 983.6847, 983.7006, ....
[0][1], ....
.....



I have noted that the syntax of the OPeNDAP request within thredds is a bit 
different, could someone kindly assist?

Thank you for your time.

Regards,


Derrick Wong 
Software Engineer | ASRDC (Australian Spatial Research Data Commons) Project | 
CSIRO

Phone: +61 8 6436 8945
derrick.wong@xxxxxxxx | www.csiro.au
Address: ARRC (Australian Resources Research Centre), 26 Dick Perry Avenue, 
Kensington WA 6151, Australia

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• Follow-Ups:
  • [thredds] Thredds Opendap Dataset Access Form "Get as NetCDF"
    • From: Derrick.Wong
  • Re: [thredds] Thredds Opendap request
    • From: Roy Mendelssohn
  • Re: [thredds] Thredds Opendap request
    • From: Daniel Holloway

• References:
  • [thredds] Direct file download problem
    • From: Pauline Mak
  • Re: [thredds] Direct file download problem
    • From: Ethan Davis