Select MARC Field. Ground Truthing the Use of MARCis the process whereby geographic remotesensing data is checked or enhanced by on-the-groundobservation and measurement. We are performing asimilar function for library cataloging.
Most libraries haveused thefor many decades, but how? Which elements andsubfields have actually been used, and more importantly,how? This work seeks to use evidence of usage, as depicted inthe largest aggregation of library data in the world to informdecisions about where we go from here.