Notary Public locations. The dataset contains locations and attributes of notary publicsC. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies. A database provided by the Office of Notary Commissions and Authentications identified notary public locations. All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters. METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE.