About: http://webisa.webdatacommons.org/447150300

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Some of have had problems with the compass calibration if there is any steel or other magnetic material on the main part of the frame.
http://www.w3.org/ns/prov#wasQuotedFrom	rcgroups.com