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lat,lon,depth and time as gridded property-property variables #907

Open karlmsmith opened 6 years ago

karlmsmith commented 6 years ago

Reported by steven.c.hankin on 27 Aug 2010 22:31 UTC Currently LAS property-property plot support for gridded datasets does not include a way to treat the independent coordinate variables (x,y,z,t) as axes of the prop-prop plots. A nutshell description of what is desirable: when specifying a property-property plot the user is able to select lat, long, depth time much as (s)he selects other dataset variables.

As an LAS task support for this idea has been postponed, because implementing it is complicated by several factors:

  1. independent coordinates are valid variables in prop-prop plots, but not much else. So special menu logic is needed.
  2. not all of the dataset variables share the same coordinate axes. The meaning of x, y, z, and t depends upon the other variables that are involved.
  3. click-n-drag zooms on prop-prop plots with X,Y,Z, or T axes should presumably change the state of (constrain) the region widgets of the UI (??)

A suggestion on how to implement this in a manner that side-steps many of the complications:

in the UI: o In the first variable menu do not offer lat, lon, depth and time as options[[BR]] o in the second and third variable menus offer the subset of lat long, depth time that is appropriate to the variable selected in the first menu[[BR]] in the Ferret scripts: o if the second or third variable is lat, lon, depth or time, then synthesize the new variable using the appropriate variation on "X[g=var1]". (Be careful in how you name the variables that are synthesized, so they do not collide with other variable names.)

Migrated-From: http://dunkel.pmel.noaa.gov/trac/las/ticket/901

karlmsmith commented 6 years ago

Comment by steven.c.hankin on 30 Aug 2010 16:18 UTC Have marked this as a trivial priority because the standard gridded plots already provide excellent visualizations of the relationship betwwen dataset vars (e.g. temp) and their axis coordinates through maps, sections, etc. (Arguably this trac ticket is not worth doing.)