View Metadata
Townsend, Massachusetts, 1988 (USGS 7.5 x 15 Minute Quadrangle DRG)
- Identification Information
- Data Quality Information
- Spatial Data Organization Information
- Spatial Reference Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
- Identification Information
- Citation
- Originator
- Geological Survey (U.S.)
- Publication Date
- 19960228
- Title
- Townsend, Massachusetts, 1988 (USGS 7.5 x 15 Minute Quadrangle DRG)
- Geospatial Data Presentation Form
- map
- Publication Information
- Publication Place
- Reston, Va.
- Publisher
- United States Geological Survey
- Online Linkage
- https://hgl.harvard.edu/catalog/harvard-madrg-k42071f5
- Abstract
- This layer is a digital raster graphic of the 7.5 x 15 Minute USGS topographic map of the Townsend, Massachusetts quadrangle, 1988. Scale 1:25,000. The DRG was published in 1996. A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) standard series topographic map, including all map collar information. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Universal Transverse Mercator (UTM) projection. The horizontal positional accuracy and datum of the DRG matches the accuracy and datum of the source map. The source paper map was produced by the United States Geological Survey. It was compiled by photogrammetric methods from aerial photographs taken 1980-1981. Field checked 1983. Map edited 1988. The names of quadrangles which border this one appear in a table on the map collar in their respective positions (N,S,E,W) in relation to this map.
- Purpose
- A DRG is useful as a source or background layer in a GIS, as a means to perform quality assurance on other digital products, and as a source for the collection and revision of DLG data. DRG's can also be merged with other digital data, e.g. DEM's or DOQ's, to produce a hybrid digital file. One of the most widely used of all maps is the topographic map. The feature that most distinguishes topographic maps from maps of other types is the use of contour lines to portray the shape and elevation of the land. Topographic maps render the three-dimensional ups and downs of the terrain on a two-dimensional surface. Topographic maps usually portray both natural and manmade features. They show and name works of nature including mountains, valleys, plains, lakes, rivers, and vegetation. They also identify the principal works of humans, such as roads, boundaries, transmission lines, and major buildings. The wide range of information provided by topographic maps make them extremely useful to professional and recreational map users alike. Topographic maps are used for engineering, energy exploration, natural resource conservation, environmental management, public works design, commercial and residential planning, urban planning and design, and outdoor activities like hiking, camping, and fishing. These maps can provide an excellent view of the changes that have occurred in the cultural and physical landscape. As this map has been georeferenced, it may serve as a useful basemap in conjunction with other GIS vector data.
- Supplemental Information
- This layer is part of a series of digital raster graphics (DRG) of USGS topographic map quadrangles covering the entire state of Massachusetts acquired by The Harvard Map Collection. These DRG layers have been processed and made available online through the Harvard Geospatial Library. Massachusetts DRG series available through the Harvard Geospatial Library include: 7.5- by 7.5-minute, 7.5- by 15-minute, and 1- by 2-degree quadrangles. Scales of these maps range from 1:24,000 to 1:250,000. The Harvard Geospatial Library also has made available a set of the 1:62,500-scale, 15-minute USGS topographic quadrangle maps covering the state of Massachusetts produced between the early 1880s to the mid-1960s.
- Temporal Extent
- Currentness Reference
- ground condition
- Time Instant
- 1988
- Bounding Box
- West
- -71.763775
- East
- -71.456634
- North
- 42.762457
- South
- 42.612545
- Theme Keyword
- Maps, Topographic
- Land use
- Infrastructure (Economics)
- Human settlements
- Bodies of water
- Landforms
- Theme Keyword Thesaurus
- LCSH
- ISO Topic Category
- imageryBaseMapsEarthCover
- Place Keyword
- Massachusetts
- Townsend
- Lunenburg
- Pepperell
- Groton
- Shirley
- Dunstable
- Place Keyword Thesaurus
- GNIS
- Temporal Keyword
- Access Restrictions
- None.
- Use Restrictions
- Acknowledgment of the USGS would be appreciated in products derived from these data.
- Status
- Complete
- Maintenance and Update Frequency
- Irregular
- Point of Contact
- Contact Organization
- Rolla-ESIC
- Delivery Point
- U.S. Geological Survey
- Delivery Point
- 1400 Independence Road, MS 231
- City
- Rolla
- State
- MO
- Postal Code
- 65401-2602
- Country
- USA
- Contact Telephone
- (573) 308-3500
- Contact Facsimile Telephone
- (573) 308-3615
- Contact Electronic Mail Address
- mcmcesic@usgs.gov
- Hours of Service
- Monday through Friday 7:45 AM to 4:15 PM (U.S. Central Time)
- Credit
- This DRG was produced through an Innovative Partnership agreement between The Land Information Technology Company, Ltd., of Aurora, CO and the USGS.
- Native Data Set Environment
- Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.1.0.722
- Data Quality Information
- Attribute Accuracy Report
- The DRG is an 8-bit color image that employs a color palette to ensure uniform colors throughout a particular DRG series. All DRG's within a series must have the same RGB value.
- Logical Consistency Report
- Not Applicable.
- Completeness Report
- The DRG is a faithfully reproduced digital image of the original source map. Some differences may be detected between the source graphic used and the DRG due to the RGB values assigned that particular color. The intent is to recreate those colors as near as possible. Data completeness for DRG files reflect content of the source graphic. Features may have been eliminated or generalized on the source graphic due to scale and legibility constraints. For information on collection and inclusion criteria, see U.S. Geological Survey, 1994, Standards for 1:24,000-Scale Digital Line Graphs and Quadrangle Maps: National Mapping Program Technical Instructions and U.S. Geological Survey, 1994, Standards for Digital Line Graphs: National Mapping Program Technical Instructions.
- Horizontal Positional Accuracy Report
- While the datum of the published map is retained to be consistent with other USGS digital data, this image is cast on the UTM and may be INCONSISTENT with the credit note on the image collar.
- Lineage
- Source
- Originator
- Geological Survey (U.S.)
- Publication Date
- 1988
- Title
- Townsend, Massachusetts - New Hampshire : 1:25 000-scale metric topographic map
- Geospatial Data Presentation Form
- map
- Collection Title
- Massachusetts, 7.5 x 15 minute series (topographic) : 1:25 000-scale metric topographic map
- Publication Information
- Publication Place
- Reston, Va.
- Publisher
- U.S. Geological Survey
- Other Citation Details
- 42071-F5-TM-025
- Source Scale Denominator
- 25000
- Type of Source Media
- paper
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 1988
- Source Currentness Reference
- publication date
- Contribution
- The source map is scanned to produce the DRG.
- Source
- Originator
- Geological Survey (U.S.)
- Publication Date
- 19960228
- Title
- Townsend
- Geospatial Data Presentation Form
- map
- Collection Title
- DRG : Digital Raster Graphic data
- Publication Information
- Publication Place
- Reston, Va.
- Publisher
- U.S. Geological Survey
- Other Citation Details
- File name: K42071F5
- Source Scale Denominator
- 25000
- Type of Source Media
- online
- Source Temporal Extent
- Time Period Information
- Single Date/Time
- Calendar Date
- 1988
- Source Currentness Reference
- ground condition
- Contribution
- DRG is converted to SDE Raster.
- Spatial Data Organization Information
- Direct Spatial Reference Method
- Raster
- Raster Object Information
- Raster Object Type
- Pixel
- Row Count
- 6260
- Column Count
- 9723
- Vertical Count
- 1
- Spatial Reference Information
- Horizontal Coordinate System Definition
- Planar
- Grid Coordinate System
- Grid Coordinate System Name
- Universal Transverse Mercator
- Universal Transverse Mercator
- UTM Zone Number
- 19
- Transverse Mercator
- Scale Factor at Central Meridian
- 0.999600
- Longitude of Central Meridian
- -69.000000
- Latitude of Projection Origin
- 0.000000
- False Easting
- 500000.000000
- False Northing
- 0.000000
- Planar Coordinate Information
- Planar Coordinate Encoding Method
- row and column
- Coordinate Representation
- Abscissa Resolution
- 2.540000
- Ordinate Resolution
- 2.540000
- Planar Distance Units
- meters
- Geodetic Model
- Horizontal Datum Name
- North American Datum of 1927
- Ellipsoid Name
- Clarke 1866
- Semi-major Axis
- 6378206.400000
- Denominator of Flattening Ratio
- 294.978698
- Entity and Attribute Information
- Entity and Attribute Overview
- Each raster entity or pixel contains a color index from 0 through 12 referencing a color palette of RGB values from 0 through 255 in which the standard colors used in the DRG are defined. USGS DRG Color Palette Digital Number Color Red Green Blue 0 Black 0 0 0 1 White 255 255 255 2 Blue 0 151 164 3 Red 203 0 23 4 Brown 131 66 37 5 Green 201 234 157 6 Purple 137 51 128 7 Yellow 255 234 0 8 Light Blue 167 226 226 9 Light Red 255 184 184 10 Light Purple 218 179 214 11 Light Grey 209 209 209 12 Light Brown 207 164 142
- Entity and Attribute Detail Citation
- Draft Standards for Digital Raster Graphic.
- Distribution Information
- Format Name
- TIFF
- Distributor
- Harvard Geospatial Library
- Online Access
- http://hgl.harvard.edu/
- Name
- Metadata Reference Information
- Metadata Date
- 20061114
- Metadata Contact
- Contact Information
- Contact Organization Primary
- Contact Organization
- Harvard Geospatial Library
- Contact Position
- Geospatial Resources Cataloger
- Contact Address
- Address
- Harvard University Library
- Address
- Office For Information Systems
- Address
- 90 Mount Auburn Street
- City
- Cambridge
- State or Province
- MA
- Postal Code
- 02138
- Country
- USA
- Contact Voice Telephone
- 617-495-2417
- Contact Facsimile Telephone
- 617-496-0440
- Contact Electronic Mail Address
- hgl_ref@hulmail.harvard.edu
- Hours of Service
- Monday - Friday, 9:00 am - 4:00 pm EST-USA
- Metadata Standard Name
- FGDC Content Standards for Digital Geospatial Metadata
- Metadata Standard Version
- FGDC-STD-001-1998
- Metadata Extensions
- Online Linkage
- http://www.esri.com/metadata/esriprof80.html
- Profile Name
- ESRI Metadata Profile
