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1. 1:100,000 Digital Raster Graphics for Maryland

2000. United States Geological Survey (USGS). A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

2. 1:24,000 - 7.5 minute Digital Raster Graphics for Maryland

2000. United States Geological Survey (USGS). A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

3. 1:250,000 Digital Raster Graphics for Maryland

2000. United States Geological Survey (USGS). A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

4. 30-Year Precipitation dataset (1971-2000) for the Susquehanna River Basin'

2006. 30 Year Precipitation dataset (1971-2000) for the Susquehanna River Basin (2006 boundary). This dataset was created from a precipitation raster fro...

5. 311 City Service Requests in 2020: Washington, District of Columbia

2020. D.C. Office of the Chief Technology Officer. Data provided here are from the DC's 311 service request center. They represent all service requests such as abandoned automobiles, parking meter r...

6. 311 City Service Requests: Washington, District of Columbia, 2021

2021. D.C. Office of the Chief Technology Officer. Data provided here are from the DC's 311 service request center. They represent all service requests such as abandoned automobiles, parking meter r...

7. 311 Snow/Icy Conditions Service Requests: Baltimore, Maryland

Baltimore City. Snow related 311 Calls For Service from 2/4/2021 to present.

8. A map of the area in dispute between Pennsylvania and Maryland.

1753. Scale approximately 1:380,160; 1 map: photocopy; 17 x 19 cm, on sheet 22 x 31 cm Boundaries.

9. A New map of the province of Maryland in North America.

1780. Hinton, John, -1781. Scale approximately 1:1,170,000; 1 map; 27 x 32 cm Maryland--Maps--Early works to 1800.

10. A New Map of Virginia, Maryland and the Improved Parts of Pennsylvania and New Jersey, 1719

1719. Map of Maryland, Virginia, and surrounding areas, 1719. 49 x 54 cm; 1 images.

11. Abandoned Railroad: Baltimore County, Maryland

Baltimore County Web Map Portal. Abandoned Railroads in Baltimore County, MD.

12. Above-Ground Biomass, 30 Meter Resoulution, Statewide: Maryland, 2011

2011. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.Maryland aboveground biomass map [30m] generated using Random F...

13. Access Across America Auto Data: Baltimore-Towson, MD, 2018

2018. Murphy, Brendan and Owen, Andrew. Access Across America Auto Data: Baltimore-Towson, MD, 2018. 247.7Mb shapefile download.

14. Access Across America Auto Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2018

2018. Murphy, Brendan and Owen, Andrew. Access Across America Auto Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2018. 512.5Mb shapefile download.

15. Access Across America Auto Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2018

2018. Murphy, Brendan and Owen, Andrew. Access Across America Auto Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2018. 411.0Mb shapefile download.

16. Access Across America Bike Data: Baltimore-Towson, MD, 2017

2017. Murphy, Brendan and Owen, Andrew. Access Across America Bike Data: Baltimore-Towson, MD, 2017. 285.8Mb shapefile download.

17. Access Across America Bike Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2017

2017. Murphy, Brendan and Owen, Andrew. Access Across America Bike Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2017. 585.4Mb shapefile download.

18. Access Across America Bike Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2017

2017. Murphy, Brendan and Owen, Andrew. Access Across America Bike Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2017. 503.0Mb shapefile download.

19. Access Across America Transit Data: Baltimore-Towson, MD, 2014

2014. Owen, Andrew and Levinson, David M. Access Across America: Transit Data 2014 for Baltimore-Towson, MD. 36.46Mb shapefile download.

20. Access Across America Transit Data: Baltimore-Towson, MD, 2016

2016. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Baltimore-Towson, MD, 2016. 36.38Mb shapefile download.

21. Access Across America Transit Data: Baltimore-Towson, MD, 2017

2017. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Baltimore-Towson, MD, 2017. 36.38Mb shapefile download.

22. Access Across America Transit Data: Baltimore-Towson, MD, 2018

2018. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Baltimore-Towson, MD, 2018. 151.3Mb shapefile download.

23. Access Across America Transit Data: Baltimore-Towson,MD, 2015

2015. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Baltimore-Towson,MD, 2015. 36.38Mb shapefile download.

24. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2014

2014. Owen, Andrew and Levinson, David M. Access Across America: Transit Data 2014 for Philadelphia-Camden-Wilmington, PA-NJ-DE-MD. 73.62Mb shapefile download.

25. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2016

2016. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2016. 73.41Mb shapefile download.

26. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2017

2017. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2017. 73.41Mb shapefile download.

27. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2018

2018. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2018. 316.5Mb shapefile download.

28. Access Across America Transit Data: Philadelphia-Camden-Wilmington,PA-NJ-DE-MD, 2015

2015. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Philadelphia-Camden-Wilmington,PA-NJ-DE-MD, 2015. 73.41Mb shapefile download.

29. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2014

2014. Owen, Andrew and Levinson, David M. Access Across America: Transit Data 2014 for Washington-Arlington-Alexandria, DC-VA-MD-WV. 75.50Mb shapefile download.

30. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2016

2016. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2016. 75.36Mb shapefile download.

31. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2017

2017. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2017. 75.36Mb shapefile download.

32. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2018

2018. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2018. 243.1Mb shapefile download.

33. Access Across America Transit Data: Washington-Arlington-Alexandria,DC-VA-MD-WV, 2015

2015. Murphy, Brendan and Owen, Andrew. Access Across America Transit Data: Washington-Arlington-Alexandria,DC-VA-MD-WV, 2015. 75.36Mb shapefile download.

34. Access Across America Walk Data: Baltimore-Towson, MD, 2014

2014. Murphy, Brendan, Levinson, David M, and Owen, Andrew. Access Across America Walk Data: Baltimore-Towson, MD, 2014. 39.97Mb shapefile download.

35. Access Across America Walk Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2014

2014. Murphy, Brendan, Levinson, David M, and Owen, Andrew. Access Across America Walk Data: Philadelphia-Camden-Wilmington, PA-NJ-DE-MD, 2014. 81.65Mb shapefile download.

36. Access Across America Walk Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2014

2014. Murphy, Brendan, Levinson, David M, and Owen, Andrew. Access Across America Walk Data: Washington-Arlington-Alexandria, DC-VA-MD-WV, 2014. 85.37Mb shapefile download.

37. ACS Demographic Characteristics DC Census Tract: Washington, District of Columbia

City of Washington, DC. Age, Sex, Race, Ethnicity, Total Housing Units, and Voting Age Population. This service is updated annually with American Community Survey (ACS) 5-...

38. ACS Demographic Characteristics DC Ward: Washington, District of Columbia

City of Washington, DC. Age, Sex, Race, Ethnicity, Total Housing Units, and Voting Age Population. This service is updated annually with American Community Survey (ACS) 5-...

39. ACS Demographic Characteristics DC: Washington, District of Columbia

City of Washington, DC. Age, Sex, Race, Ethnicity, Total Housing Units, and Voting Age Population. This service is updated annually with American Community Survey (ACS) 1-...

40. ACS Economic Characteristics DC Census Tract: Washington, District of Columbia

City of Washington, DC. Employment, Commuting, Occupation, Income, Health Insurance, Poverty, and more. This service is updated annually with American Community Survey (AC...

41. ACS Economic Characteristics DC Ward: Washington, District of Columbia

City of Washington, DC. Employment, Commuting, Occupation, Income, Health Insurance, Poverty, and more. This service is updated annually with American Community Survey (AC...

42. ACS Economic Characteristics DC: Washington, District of Columbia

City of Washington, DC. Employment, Commuting, Occupation, Income, Health Insurance, Poverty, and more. This service is updated annually with American Community Survey (AC...

43. ACS Employment Status Variables Tract: Washington, District of Columbia, 2019

2019. Census Bureau. This layer shows hours worked, and those unemployed and not in labor force. This is shown by tract boundaries released by American Community Survey...

44. ACS Housing Characteristics DC Census Tract: Washington, District of Columbia

City of Washington, DC. Occupancy status, Units, Rooms, Year built, Owner/Renter (Tenure), Mortgage/Rent costs, and more. This service is updated annually with American Co...

45. ACS Housing Characteristics DC Ward: Washington, District of Columbia

City of Washington, DC. Occupancy status, Units, Rooms, Year built, Owner/Renter (Tenure), Mortgage/Rent costs, and more. This service is updated annually with American Co...

46. ACS Housing Characteristics DC: Washington, District of Columbia

City of Washington, DC. Occupancy status, Units, Rooms, Year built, Owner/Renter (Tenure), Mortgage/Rent costs, and more. This service is updated annually with American Co...

47. ACS Housing Costs Variables Tract: Washington, District of Columbia, 2019

2019. Census Bureau. This layer shows housing costs as a percentage of household income. This is shown by tract boundaries released by American Community Survey (ACS) 5...

48. ACS Median Household Income Variables Tract: Washington, District of Columbia, 2019

2019. Census Bureau. This layer shows median household income by race and by age of householder. This is shown by tract boundaries and contains estimates and margins of...

49. ACS Population Variables Tract: Washington, District of Columbia, 2019

2019. Census Bureau. This layer contains data from the American Community Survey (ACS) about total population count by sex and age group. These are 5-year estimates sho...

50. ACS Poverty Status Variables Tract: Washington, District of Columbia, 2019

2019. Census Bureau. This layer contains data from the American Community Survey (ACS) about poverty status by age group. These are 5-year estimates shown by tract boun...

51. ACS Social Characteristics DC Census Tract: Washington, District of Columbia

City of Washington, DC. Household type, Education, Disability, Language, Computer/Internet Use, and more. This service is updated annually with American Community Survey (...

52. ACS Social Characteristics DC Ward: Washington, District of Columbia

City of Washington, DC. Household type, Education, Disability, Language, Computer/Internet Use, and more. This service is updated annually with American Community Survey (...

53. ACS Social Characteristics DC: Washington, District of Columbia

City of Washington, DC. Household type, Education, Disability, Language, Computer/Internet Use, and more. This service is updated annually with American Community Survey (...

54. Active Development: Baltimore County, Maryland

Baltimore County Web Map Portal.

55. Address Points: Anne Arundel County, Maryland

Anne Arundel County, Office of Information Technology, Geographic Information Services (OIT GIS). Current address point GIS layer for Anne Arundel County, MD.

56. Address Points: Baltimore County, Maryland

Baltimore County Web Map Portal. This entity is a point feature class within ESRI's Geodatabase. It stores the geographic location for an address location and will contain a unique...

57. Address Points: Carroll County, Maryland

2016. Carroll County, Maryland. Address Points for Carroll County Maryland.

58. Address Points (Geodatabase): Montgomery County, Maryland

This is a geodatabase of address points for Montgomery County, Maryland.

59. Address Points: Howard County, Maryland, 2018

2018. Address points containing the street address generally set to the center of the addressed structure. Plats and parcel drawings are used to help loc...

60. Address Points: Prince George's County, Maryland

This layer contains locational property address identifiers for the numbered thoroughfare addresses within Prince George’s County, Maryland. The ma...

61. Address Points: Queen Anne's County, Maryland, 2018

2018. Points containing street address attribution. May be used for geocoding, address search applications, and address mailings.

62. Address Points: St. Mary's County, Maryland

63. Address Units: Baltimore County, Maryland

Baltimore County Web Map Portal.

64. Adopt a Block: Washington, District of Columbia

2020. City of Washington, DC. The Clean City's Adopt-A-Block Program helps beautify neighborhoods and allows citizens and families to take an active role in cleaning and greenin...

65. Adult Day Care: Baltimore, Maryland

2021. Baltimore City. This dataset represents the location of adult day care facilities within the City of Baltimore. The list of facilities is from the Maryland Office ...

66. Advance Lands, The Maryland-National Capital Park & Planning Commission: Prince George's County, Maryland

The Maryland-National Capital Park & Planning Commission. This dataset represent 'Advance Land' owned by M-NCPPC. The land was purchased by M-NCPPC but not earmarked for recreation or conservation.

67. Aerial Imagery, 1 Meter Resolution, Statewide, National Agriculture Imagery Program: Maryland, 2017

2017. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.The National Agriculture Imagery Program (NAIP) acquires aerial...

68. Aerial Imagery, 3 Inch Resolution: Baltimore, Annapolis, Gaithersburg, Maryland, 2014, 2016

2014\\\, 2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.This image service provides Three Inch resolution aerial imager...

69. Aerial Imagery, 6 Inch Resolution, Statewide: Maryland, 2014, 2016

2014\\\, 2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.This image service provides Six Inch resolution aerial imagery ...

70. Aerial Imagery Index Grid, 12-foot Resolution: Prince George's County, Maryland, 1998

1998. The Maryland-National Capital Park & Planning Commission.

71. Aerial Imagery Index Grid, 1-foot Resolution: Prince George's County, Maryland, 1998

1998. The Maryland-National Capital Park & Planning Commission.

72. Aerial Imagery Index Grid, 3-foot Resolution: Prince George's County, Maryland, 1998

1998. The Maryland-National Capital Park & Planning Commission.

73. Aerial Imagery Index Points: Prince George's County, Maryland, 1965

1965. The Maryland-National Capital Park & Planning Commission. The Commission has purchased a set of black & white imagery paper prints for all of Prince George's County, Maryland. This GIS point layer is used ...

74. Aerial Imagery Index Points: Prince George's County, Maryland, 1968

1968. The Maryland-National Capital Park & Planning Commission. The Commission has purchased a set of black & white imagery paper prints for all of Prince George's County, Maryland. This GIS point layer is used ...

75. Aerial Imagery Index Points: Prince George's County, Maryland, 1972

1972. The Maryland-National Capital Park & Planning Commission. The Commission has purchased a set of black & white imagery paper prints for all of Prince George's County, Maryland. This GIS point layer is used ...

76. Aerial Imagery Index Points: Prince George's County, Maryland, 2014

2014. The Maryland-National Capital Park & Planning Commission. The Commission purchased imagery for Spring 2014 from Kucera International, Inc. for all of Prince George's County, Maryland. This GIS point layer...

77. Aerial Photo Centers, Maryland Imagery Acquisition Flight Information: Maryland

2018. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information on http://imap.maryland.gov.This service contains photo centers for the 2016 2017 high-reso...

78. Aerial Photo Tile Grid, 3 Inch, Maryland Imagery Acquisition Flight Information: Baltimore, Annapolis, Gaithersburg, Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This data contains the tile layout for imagery acquistion...

79. Aerial Photo Tile Grid, 6 Inch, Maryland Imagery Acquisition Flight Information: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.This data contains the tile layout for imagery acquistion...

80. Aerial Photography Image Service (Orthophoto): Washington, District of Columbia, 2013

2013. City of Washington, DC. 2013 Orthophoto - 3 inch resolution imagery service. Data produced for the District of Columbia from 2013 digital aerial photography. Further detai...

81. Aerial Photography Image Service (Orthophoto): Washington, District of Columbia, 2015

2015. City of Washington, DC. 2015 Orthophoto - 3 inch resolution imagery service. Data produced for the District of Columbia from 2015 digital aerial photography. It was flown ...

82. Aerial Photography Image Service (Orthophoto): Washington, District of Columbia, 2019

2019. City of Washington, DC. 2019 Orthophoto - 3 inch resolution imagery service. Data produced for the District of Columbia from 2019 digital aerial photography. Flight took p...

83. Age Restricted Housing: Howard County, Maryland, 2017

2017. Age restricted housing communities.

84. Agricultural Designations - Permanently Preserved Agricultural Lands: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov.This layer contains lands that have been forever restricted fro...

85. Agricultural Designations - Priority Preservation Areas: Maryland

2016. MDP. This layer illustrates Priority Preservation Areas as adopted by each respective county in the state of Maryland that wishes to gain certification ...

86. Agricultural Reserve: Montgomery County, Maryland

2019. Montgomery County, MD. Agricultural Reserve Area within Montgomery County, MD.

87. Agriculture (AR) Zone, Montgomery Planning: Montgomery County, Maryland

The intent of the AR zone is to promote agriculture as the primary land use in areas of the County designated for agricultural preservation.

88. Agriculture Preservation Areas: Carroll County, Maryland

2016. Carroll County, Maryland. Ag Preservation easements for Carroll County Maryland.

89. Agriculture Reserve, Office of Agriculture: Montgomery County, Maryland

The Agricultural Reserve and its accompanying Master Plan and zoning elements were designed to protect farmland and agriculture. The zoned area enc...

90. AIDS Drug Assistance Program: Washington, District of Columbia

2019. City of Washington, DC. Dataset provided by DC Health. The AIDS Drug Assistance Program (ADAP) operates in the District of Columbia and in all 50 states, Guam, Northern Ma...

91. Airport Locations: Prince George's County, Maryland

The Maryland-National Capital Park & Planning Commission. This layer contains the location of all airports, airfields, and known public and private heliports in Prince George's County, Maryland.

92. Airport Runway and Taxiway: Washington, District of Columbia, 2017

2017. D.C. Office of the Chief Technology Officer. Runway, taxiway, apron, airport perimeter, or helipad. The dataset contains polygons representing planimetric runway, taxiway, apron, airport perim...

93. Airports: Montgomery County, Maryland

2015. Montgomery County, MD. Airports.

94. Alarm Box Zones, Emergency Services: Queen Anne's County, Maryland

Land & water areas of the county cadastrally divided into emergency response fire alarm box zones.

95. Alleys and Driveways: Baltimore County, Maryland

Baltimore County Web Map Portal.

96. Alternative Compliance Landscape Plans: Prince George's County, Maryland

Alternative Compliance Plans depict an alternative landscape plan to fulfill requirements in accordance with the Landscape Manual. Plans are review...

97. Alternative Fuel - Biodiesel Fuel Stations: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.Through a nationwide network of local coalitions, Clean C...

98. Alternative Fuel - Compressed Natural Gas Fuel Stations: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.Through a nationwide network of local coalitions, Clean C...

99. Alternative Fuel - Electric Vehicle Charging Stations: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.Through a nationwide network of local coalitions, Clean C...

100. Alternative Fuel - Ethanol 85 Fuel Stations: Maryland

2016. ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.Through a nationwide network of local coalitions, Clean C...