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Washington, DC & Vicinity Aerial Photographs, 1945-1949 This collection (known internally at Maryland Geological Survey as Component 9) consists of 1,474 black-and-white aerial photographs (1,472 unique frames plus 2 duplicates) plus 2 index maps which serve as a finding aid for the photographs in the two sub-components of this collection -- DC Collection 1 and DC Collection 2. The photographs are 9 in. by 9 in. in size and cover Washington, DC and vicinity (including portions of Maryland and Virginia). The counties in Maryland covered by these aerial photographs are Anne Arundel, Howard, Montgomery, and Prince George's Counties. No date is printed on these photographs; however, based on features shown in the photographs, Maryland Geological Survey (MGS) estimates... Categories: Data, Image, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection Quad-Based Infrared Aerial Photographs, 1988-1989 This collection (known internally at Maryland Geological Survey as Component 8) consists of 211 infrared, 9 in. by 9 in. aerial photographs (211 unique frames) flown on a 7.5-minute U.S. Geological Survey (USGS) quadrangle basis. The photographs date from 1988-1989 and were flown or otherwise acquired by the USGS National Aerial Photograph Program (NAPP). The Maryland counties covered by these photographs include Allegany, Anne Arundel, Calvert, Cecil, Charles, Dorchester, Kent, Prince George’s, Queen Anne’s, Somerset, St. Mary’s, Talbot, Washington, and Worcester Counties. The scale of these photographs is not printed on the photographs; however, Maryland Geological Survey (MGS) calculates the scale to be approximately... Categories: Data, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection High-Altitude Black-and-White Aerial Photographs, 1980-1983 This collection (known internally at Maryland Geological Survey as Component 6) consists of 214 high-altitude, black-and-white aerial photographs (210 unique records plus 4 duplicates). The photographs date from 1980-1983 and were primarily flown or acquired by the U.S. Geological Survey (USGS). The photographs cover portions of Maryland, Pennsylvania, Virginia, and West Virginia. The counties in Maryland covered by these photographs include Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford, Howard, Montgomery, Prince George's, Queen Anne's, and Washington Counties. Although not printed on the photographs, MGS estimates that the scale of these aerial photographs is approximately 1:80,000. These photographs... Categories: Data, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection High-Altitude Infrared Aerial Photographs, 1970-1974 This collection (known internally at Maryland Geological Survey as Component 7) consists of 48 high-altitude, 9 in. by 9 in. infrared aerial photographs (48 unique frames). The photographs date from 1970-1974 and were flown over ten counties in Maryland and some small portions of Virginia along the Maryland border. The counties in Maryland covered by these photographs include Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick, Harford, Howard, Montgomery, and Prince George?s Counties. The scale of these photographs is not printed on the photographs; however, Maryland Geological Survey (MGS) calculates the scale to be approximately 1:120,000 for the Series 74-039 photographs; approximately 1:140,000... Categories: Data, Image, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection Collection of Drill Cuttings from MD The Maryland Geological Survey (MGS) Drill Cuttings Collection consists of washed and unwashed cuttings from drilling sites throughout Maryland. The collection includes chips from rock drillings as well as cuttings from unconsolidated Coastal Plain sediment drilling. There are approximately 2,600 boxes (15.5” x 5.5” x 3.4”) in the collection. Each box contains between 20-50 envelopes, bags, or vials of cuttings. Thanks to U.S. Geological Survey (USGS) National Geological and Geophysical Data Preservation Program (NGGDPP) grants, approximately 1,999 boxes of drill cuttings containing over 43,500 envelopes have been inventoried as of August 2021. The Drill Cuttings Collection is now primarily stored in the MGS... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection Quad-Based Aerial Photographs, 1936-1991 This collection (known internally at Maryland Geological Survey as Component 5) consists of 4,720 items – 4,715 black-and-white aerial photographs (4,688 unique frames plus 27 duplicates) and 5 associated index maps. The aerial photographs were flown or acquired by the U.S. Geological Survey (USGS) and organized on a 7.5-minute quadrangle basis. The photographs are black-and-white and approximately 9 in. x 9 in. in size. The scale of the aerial photography varies but ranges from approximately 1:12,000 to 1:35,400. These photographs date from 1936-1991 and were donated to the Maryland Geological Survey (MGS). The index maps serve as a finding aid for several of the flight series flown over five quadrangles... Categories: Data, Image, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection County Aerial Photograph Index Maps, 1936-1980 This collection (known internally to Maryland Geological Survey as Component 4) consists of 375 22-inch by 34-inch photo-mosaic index maps dating from 1936-1980. These index maps depict flight lines and frame numbers for two components of the MGS Aerial Photograph Collection: 1) Component 1: County-Based Aerial Photographs (https://www.sciencebase.gov/catalog/item/4f4e4a94e4b07f02db658dba); and 2) Component 2: MD Barrier Island Aerial Photographs (Enlargements) (https://www.sciencebase.gov/catalog/item/4f4e4aafe4b07f02db66cf18). These index maps serve as a finding aid for these two components. All of the index maps have been scanned (most to JPG, PDF, and TIF format). Digital imagery (PDF) for the majority... Categories: Data, Map, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection Montgomery County Aerial Photographs (Enlargements), 1966-1974 This collection (known internally at Maryland Geological Survey as Component 3) consists of 192 items – 191 unrectified, black-and-white, 19-inch by 19-inch photographic enlargements taken over the Rockville-Laurel area of Montgomery County, Maryland (176 unique frames plus duplicates); and one index map which shows the flight lines for the GS-VRCA-1 flight series. These photographs were flown annually or biannually, during 12 different time periods (or “sets”) between June 1966 and July 1974. The scale of these photographs is unknown. The scale of the index map is 1:125,000. These aerial photographs were scanned by Maryland State Archives (MSA) and are available in JPF, JPG, PDF, and TIF format. The index... Categories: Data, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection USGS NWIS Well-Related Aerial Photographs, 1987-1989 This collection (known internally at Maryland Geological Survey as Component 10) consists of 45 black-and-white aerial photographs (45 unique frames). These photographs are 9 in. x 9 in. in size and date from 1987-1989. The Maryland counties covered by these photographs include Anne Arundel, Baltimore, Calvert, Carroll, Cecil, Charles, Frederick, Harford, Howard, Montgomery, and St. Mary’s Counties. These photographs were primarily flown or otherwise acquired by the U.S. Geological Survey (USGS) and reference USGS National Water Information System (NWIS) wells. The scale of these photographs is not printed on the photographs; however, Maryland Geological Survey (MGS) calculates the scale to be approximately... Categories: Data, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection MD Barrier Island Aerial Photographs (Enlargements), 1952-1964 This collection (known internally at Maryland Geological Survey as Component 2) consists of 505 enlargements of unrectified, black-and-white aerial photographs flown along Maryland's barrier islands during 13 different time periods (or "sets") between October 1952 and July 1964. Each of the photographs in the collection is about 2 feet x 2 feet in size. Some of the photographs have a scale of 1:14,400 or 1:6,000 stamped on the front. On the backs of many of the photographs is another stamp of "1" = 200 ft". The photographs cover the Maryland section of two narrow barrier islands that lie along Maryland's Atlantic coast, separated by the Ocean City Inlet: Fenwick Island to the north and Assateague Island to the... Categories: Data, Image, Physical Item; Types: Collection, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ndc_collection