G5NR Data Access Guide: Difference between revisions
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===== NCL ===== | ===== NCL ===== | ||
===== IDV | ===== IDV ===== | ||
[http://www.unidata.ucar.edu/software/idv/ IDV] is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location. | [http://www.unidata.ucar.edu/software/idv/ IDV] is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location. | ||
Revision as of 07:06, 16 October 2014
Background
File spec
Model config
Getting data
ftp, http
Download tool
opendap
Client access
Programming
C
Fortran
Shmem example
Free clients
Python
NCL
IDV
IDV is an OPeNDAP tool that can access and display the nature run data. In our OPenDAP server, all files are time aggregated, so they appear as a single dataset for each location.
This is an example to open and display 'tlml' (surface air temperature) from the collection 'inst01hr_2d_met1_Cx'. The OPenDAP URL for this dataset is http://opendap.nccs.nasa.gov:80/dods/OSSE/GEOS-5.12/BETA9/0.5000_deg/inst/inst01hr_2d_met1_Cx. The following steps are valid for IDV version 5.0u1 running on a Linux desktop.
From the 'Dashboard' panel
- Select Data Choosers -> URLS.In the URL field, enter the above OPenDAP URL and click on 'Add Source'
- Select Field Selector and choose 'surface_air_temperature'. The 'Times' tab lists all the available timestamps for this data. At this point, one can select specific times and regions (subsetting) from the 'Times' and 'region' tabs. Click on 'Create Display'.