12. A content delivery system comprising: a control unit for: determining a context for identifying a device within a geographic region, identifying a feature including a key feature and a contrastive feature of a candidate route, generating a route description based on the feature, generating a prompt based on the context for adding or removing the feature from the route description, and a communication unit, coupled to the control unit, for delivering the prompt on the device.
12. A content delivery system comprising: a control unit for: determining a context for identifying a device within a geographic region, identifying a feature including a key feature and a contrastive feature of a candidate route, generating a route description based on the feature, generating a prompt based on the context for adding or removing the feature from the route description, and a communication unit, coupled to the control unit, for delivering the prompt on the device. 13. The system as claimed in claim 12 wherein the control unit is for identifying the key feature based on comparing a road segment to another instance of the road segment within the candidate route.