There are several variable and bounding scenarios we need to consider:

• no spatial subsetting and no variables - return no query string in OPeNDAP URL; this will give users all variables for the entire extent defined in the variables’ metadata.
• variables but no spatial subsetting - return a query string with just the variables requested; a Latitude,Longitude will also be appended to the OPeNDAP URL; this will give users just these variables, but for the entire extent defined in each variable’s metadata.
• variables and spatial subsetting - return a query string with the variables requested as well as the subsetting requested; this will give users just these variables, with data limited to the specified spatial range.
• spatial subsetting but no variables - this is a special case that needs to do a little more work: special subsetting without variables will link to an essentially empty OPeNDAP file; as such, we need to iterate through all the variables in the metadata and create an OPeNDAP URL query string that provides the sensible default of all variables.

For each of those conditions, a different value of vars will be returned, allowing for the desired result. Respective to the bullet points above:

• vars - empty vector
• vars - metadata for all the specified variable ids
• vars - metadata for all the specified variable ids
• vars - metadata for all the variables associated in the collection

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming

Documentation forthcoming