The latest digital parcel maps and property data for Montgomery and Somerset counties
Charles Countyare currently updated and available for download at the Maryland Department of Planning's Downloadable GIS Files site. These file packages for MdProperty View and FINDER Quantum as well as packages for Maryland's 21 other counties and Baltimore are made free to the public under Maryland State Government's Open Data Initiative. The online version of these products, FINDER Online, is also a free service.

MDP was the first state agency in the nation to develop a statewide digital parcel map and information system, releasing the first edition of MdProperty View in 1995. Built upon the State Department of Assessments and Taxation's database of 2.3 million parcel records and MDP's 2,800 computerized tax maps, Maryland was well positioned to create those products. FINDER Quantum and FINDER Online were later added to provide easy access for the casual user. This initiative combined with other efforts continues to establish MDP and Maryland as a leader in providing open data.