Unidata IDV Workshop for version 3.0u2 > Accessing and Displaying Data > Working with Gridded Data
3.2.13 Working with Ensemble Grids
Displaying ensemble grids in the IDV can be memory
intensive. If you are reading from a remote server, you also
have to deal with the latency of reading the grids across the
internet. There are several strategies you can use to reduce
the amount of memory used by the IDV.
- First, let's load in a ensemble grid.
- If you have not already done so, use the
menu to remove the displays
created in the previous exercise.
- In the
Catalog data chooser, select the
dataset.
- In the
Fields panel,
expand the 3D grid tab and the Mass tab. Select the
geopotential height, the Contour Plan View display.
- In the
Fields subset panel, and set the
Level to be 500 hectopascals, on the Times tab, uncheck the
Use All box, right click on the panel and select the
menu option ,
set the Region to conver US CONUS, on the Ensemble tab, select the
All Members, or use the combination of Ctl and left mouse button
and select a few members in the listand, then click
the Create Display button.
- User can change the range of color table to refelct how many members selected, the default range is 0 to 20,
and the user can also disable "Color by Member"
in the display control tab. The user will then have the capability of
choosing an appropriate color table and color range for their data.
- After creating the display, the user can specify irregular contour intervals with a
semi-colon separated list of the values in the
Contour Property Editor. For example:
entering 5460;5800 would only show the 5460 and 5800 contour lines.
- There are a few sample bundles in the Data/Grids/Ensemble folder.
Unidata IDV Workshop for version 3.0u2 > Accessing and Displaying Data > Working with Gridded Data
