As well as highlighting issues, local knowledge can be useful in scrutinising evidence to ensure that all relevant background information has been taken into account in preparing the plan.
Yn ogystal â thynnu sylw at faterion, gall gwybodaeth leol fod yn ddefnyddiol wrth graffu ar dystiolaeth i sicrhau bod yr holl wybodaeth gefndirol berthnasol wedi'i hystyried wrth baratoi'r cynllun.