[netcdfgroup] defining dimensions in groups

• To: <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] defining dimensions in groups
• From: "Pedro Vicente" <pedro.vicente@xxxxxxxxxxxxxxxxxx>
• Date: Fri, 18 Jan 2013 12:27:53 -0800

Hello everyone

I have a couple questions regarding the definition of dimensions in groups;

Consider the following CDL definition

netcdf in_grp {
dimensions:
 lon=3;
variables:
 //coordinate variable
 float lon(lon);
data:
 lon=1,2,3;
group: g1 { 
 dimensions:
 lon=2;
 variables:
 float lon(lon);
 float data(lon)
 data:
 lon=1,2; 
 } // end g1
} // end

There is a "lon" dimension/coordinate variable both at root and in group /g1 
and they have different dimensions, so variable named "data" has 2 dimensions 
with the same name in scope,
and somehow has to choose one

Just wanted to confirm

1) Is this definition legal?
2) What is the algorithm that the netCDF library uses to distinguish between 
both dimensions in scope for the variable /g1/data? 
3) Defining "lon" as a coordinate variable instead of just a dimension name, 
does this definition has any consequence for the way this is handled by the 
library for this case?

Can someone from Unidata please point me to the location in the source code 
where this is handled?
   
thanks 
   
Pedro

----------------------
Pedro Vicente
http://www.space-research.org/

• Follow-Ups:
  • Re: [netcdfgroup] defining dimensions in groups
    • From: Dennis Heimbigner
  • Re: [netcdfgroup] defining dimensions in groups
    • From: Russ Rew