[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[IDV #MPQ-882676]: Question about flow vectors from grids

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDV #MPQ-882676]: Question about flow vectors from grids
  • Date: Sat, 24 Oct 2009 07:44:50 -0600
Hi Tom-

> Thanks, Don....this works well.  What I find interesting is your comment:

Glad this works out.

> > In my experience, the global grids (lat/lon) are true and all the rest are 
> > grid relative.
> 
> But aren't the vectors on lat-lon grids BOTH?

Yes, for rectillinear lat/lon grids.  I'm not sure about rotated lat/lon grids.

> Anyway, I really appreciate this -- now all we have to do is explain
> to people the difference between
> grid relative and "true" ("earth-relative"?) u- and v-components ;-)

We could always just show the true (earth relative) option and if someone wants 
the grid relative, they would have to use the formula.

Don


Ticket Details
===================
Ticket ID: MPQ-882676
Department: Support IDV
Priority: Normal
Status: Open