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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Mike- On 3/22/11 3:03 PM, Mike.Umscheid@xxxxxxxx wrote:
I'm in the process of writing some ISL files, and I'm fairly new to this so please forgive me. In creating a data source with the<datasource> tag, is there an attribute to subset the spatial domain? I see the 'times' attribute, but it would be nice to be able to subset the spatial domain, too. I guess I could use jython method to do the loading of a datasource with spatial subsetting, but I like the ease of ISL language and was wondering if spatial subsetting was an option in ISL or if I'm just stuck with jython to do this? Thanks!
Tomorrow's (Thursday, 3/24/2011) nightly IDV build will support the following attributes on <datasource> and <display> tags:
stridex = the X skip factor (stride)
stridey = the Y skip factor
stridez = the Z skip factor
bbox = the geographic bounding box (N,W,S,E)
For example:
<isl>
<datasource
url="dods://motherlode.ucar.edu:8080/thredds/dodsC/casestudies/idvtest/grids/small_ruc_grid.nc"
stridex="1" stridey="2" stridez="1" bbox="40,-113,20,-98"/>
</isl> would select every other X gridpoint, every 3rd Y gridpoint, every other level and data between 40N and 20N and 113W and 98W.You can use any or all of the attributes. Attributes specified on a <display> tag override those specified on the <datasource> tag. The documentation at:
http://www.unidata.ucar.edu/software/idv/release/nightly/docs/userguide/isl/DataAndDisplays.html will be updated with the nightly build to show these options. Don -- Don Murray NOAA/ESRL/PSD and CIRES 303-497-3596 http://www.esrl.noaa.gov/psd/people/don.murray/
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