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

[netCDF #QCT-395728]: coordinate variables for satellite data projected to the polar stereographic projection

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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: [netCDF #QCT-395728]: coordinate variables for satellite data projected to the polar stereographic projection
  • Date: Wed, 11 Jan 2012 10:42:50 -0700
Hi Randy,

> It is my understanding that the values for coordinate variables need to be
> monitonically increasing or decreasing.
> 
> How can this be achieved for a data variable containing pixels on a polar
> stereographic projected rectangular region stored in a two dimensional array?

Consider (x,y) coordinates on the projection plane, rather than (lat,lon) 
coordinates.  Then it's easy for the (x,y) coordinates to be monotonically 
increasing, and auxiliary lat(x,y) and lon(x,y) variables can depend on the
x and y coordinate variables, just as the pixels do.

--Russ


Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: QCT-395728
Department: Support netCDF
Priority: Normal
Status: Closed