About: http://webisa.webdatacommons.org/308693211

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	In step 240, the system determines the angle of the symbology using a checker pattern technique or a chain code technique, such as for example finding the slope or the orientation of the symbology 27, 28, 29 within the target 510.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com