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VMap1 Agricultural Structures, Points
- 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
- National Geospatial-Intelligence Agency
- Publication Date
- 1995-2001
- Title
- VMap1 Agricultural Structures, Points
- Geospatial Data Presentation Form
- vector digital data
- Online Linkage
- https://hgl.harvard.edu/catalog/harvard-vmap1agristrp
- Abstract
- This datalayer is a point coverage representing agricultural facilities such as silos, storage bins for feeds or grains and grain elevators. Objects in this layer have FACC (Feature and Attribute Coding Catalogue) Codes of AM020, "Grain Bin/Silo: An enclosed container, used for storing grain or fodder," or AM030, "Grain Elevator: A tall structure, equipped for loading, unloading, processing and storing grain." This layer was derived from the VMAP1 series produced by the National Geospatial-Intelligence Agency (NGA), an agency of the United States government. VMAP data set products use the "vector product format" (vpf) utilized first by the US Defense Mapping Agency and later by its successor, the National Imagery and Mapping Agency (NIMA, now known as the NGA). "VMap" is derived from "Vector Smart Map" Vector Smart Map (VMAP) Level 1 is a global vector GIS dataset at 1:250,000 scale. This is currently the most detailed global digital dataset freely available and can be downloaded from the National Imagery and Mapping Agency (NGA) website, using the GeoSpatial Engine The coverage is not complete - of the 234 zones which make up the dataset, only around 25% are currently (2002) available - others have not yet been completed or are not declassified. They feature a vast number of files organized into libraries. These libraries, or coverages, are geographicially bounded areas, rather than feature-linked coverages. VMAP Layers in the Harvard Geospatial Library are feature-based as we have processed the multiple tiles from the VMAP libraries into a series of seamless coverages (i.e. Aqueduct Lines appear in a single layer, "Aqueduct Lines") which depict a particular feature as it occurs throughout the available geographic coverage areas. Since different geographic areas were mapped by NIMA at different times using various types of feature capture and scanning and digitizing methods and software, multiple map sources of varying dates and multiple processing approaches are represented in each of these HGL layers. We have necessarily generalized the discussion of data source material and process steps in the Data Quality section of this metadata document.
- Purpose
- This layer is intended for researchers, students, and policy makers for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production. This layer will provide a basemap for layers related to socio-economic and political anaylsis, statistical enumeration and analysis, or to support graphical overlays and analysis with other spatial data. More advanced user applications may focus on demographics, urban and rural land use planning and related areas including defining boundaries, managing assets and facilities, integrating attribute databases with geographic features, spatial analysis, and presentation output.
- Temporal Extent
- Currentness Reference
- publication date
- Time Instant
- 2001
- Bounding Box
- West
- -122.498123
- East
- 140.668304
- North
- 57.866180
- South
- -5.552861
- ISO Topic Category
- farming
- structure
- Theme Keyword
- Silos
- Farm buildings
- Grain elevators
- Agriculture
- Theme Keyword Thesaurus
- LCSH
- Theme Keyword
- Storage structures
- Theme Keyword Thesaurus
- Alexandria Digital Library Feature Type Thesaurus
- Place Keyword
- Earth
- Northern Hemisphere
- Southern Hemisphere
- Eastern Hemisphere
- Western Hemisphere
- Polar regions
- Antarctica
- Arctic regions
- Africa
- Asia
- Australia
- Europe
- North America
- South America
- Place Keyword Thesaurus
- LCSH
- Temporal Keyword
- Access Restrictions
- None
- Use Restrictions
- For educational, non-commercial use only. Although this data set has been developed by the NGA no warranty expressed or implied is made by them as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the NGA in the use of this data, or related materials.
- Status
- In work
- Maintenance and Update Frequency
- Irregular
- Point of Contact
- Contact Organization
- National Geospatial-Intelligence Agency
- Delivery Point
- National Geospatial-Intelligence Agency
- Delivery Point
- Office of Corporate Relations
- Delivery Point
- Public Affairs Division, MS D-54
- Delivery Point
- 4600 Sangamore Road
- City
- Bethesda
- State
- MD
- Postal Code
- 20816-5003
- Country
- USA
- Contact Telephone
- 800-455-0899
- Hours of Service
- Monday through Friday 9:00 A.M. to 4:00 P.M. EST-USA
- Credit
- The VMAP Level 1 dataset was produced by the National Imagery and Mapping Agency (NIMA) Defense Mapping Agency (DMA) now known as the National Geospatial-Intelligence Agency (NGA).
- Native Data Set Environment
- Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 9.0.0.535
- Data Quality Information
- Completeness Report
- All features in this library have valid attribute codes assigned to them in accordance with this specification (VMapLV1 MILSPEC MIL-V-89033).
- Horizontal Positional Accuracy Report
- Absolute horizontal accuracy: Derived from cartographic source or generalized from centerline data. Actual map scale and class source of error are contained in the Data Quality coverage. Accuracy is expressed as a circular error at 90% probability.
- Quantitative Horizontal Positional Accuracy Assessment
- Lineage
- Source
- Originator
- National Geospatial-Intelligence Agency (formerly NIMA)
- Publication Date
- Unknown
- Title
- Joint Operations Graphic (JOG) Series 1501
- Geospatial Data Presentation Form
- vector digital data
- Series Information
- Series Name
- JOG Series 1501
- Source Scale Denominator
- 250000
- Type of Source Media
- stable-base material
- Source Temporal Extent
- Time Period Information
- Range of Dates/Times
- Beginning Date
- 196?
- Ending Date
- 198?
- Source Currentness Reference
- ground condition
- Contribution
- The primary sources for the VMAP layers were the NIMA (DMA) Joint Operations Graphic (JOG) Charts. The standard DoD medium scale chart, at 1: 250,000 scale, the JOG series displays topographic data such as: relief, drainage, vegetation, populated places, cultural features, coastal hydrography, aeronautical overprint depicting obstructions, aerodromes, special use airspace, navigational aids and related data. Coverage within tiles is not always consistent - data may be incomplete or missing altogether. The geographic extent of the VMap Level 1 product is global and consists of multiple regional databases. VMap Level 1 data from standard DMA source products are derived from the feature content defined in the associated military specification. The Vector Product Format (VPF) is defined by a Department of Defense Military Standard (MIL-STD-2407, July 1993), and represents a new data model for digital vector products to be built, maintained, archived, and distributed by DMA. The VMAP program is designed to provide vector-based geospatial data at medium (level 1) and high (level 2) resolution. Data is separated into 10 thematic layers consistent throughout the VMAP program. Each layer contains thematically consistent data. A reference library is provided with general information to orient the user. All data is topologically structured. Each coverage contains a set of files that describe the features in that thematic layer. Data volume is tiled at nominal one degree (level 1) and 15 minutes (level 2) expanding in size towards the poles. Cross-tile topology is maintained. Prototype data is provided with VPFView software and symbology styles. Data coverages are boundaries, elevation, hydrography, industry, physiography, population, transportation, utilities, and vegetation. The horizontal datum for this VMap product is WGS84. The vertical datum for this VMap product is mean sea level (MSL). Data gaps between a VMap Level 1 library may exist due to absence of data. The unit of measure for VMap is metric.
- Source
- Originator
- NIMA Defense Mapping Agency (now called National Geospatial-Intelligence Agency or NGA)
- Publication Date
- Unknown
- Title
- VMAP Level 1
- Geospatial Data Presentation Form
- vector digital data
- Source Scale Denominator
- 250000
- Type of Source Media
- online
- Source Temporal Extent
- Time Period Information
- Range of Dates/Times
- Beginning Date
- 1994
- Ending Date
- Continuing
- Source Currentness Reference
- publication date
- Contribution
- Vector digital data produced by Defense Mapping Agency used to create shapefiles.
- Spatial Data Organization Information
- Direct Spatial Reference Method
- Vector
- Point and Vector Object Information
- SDTS Terms Description
- SDTS Point and Vector Object Type
- Entity point
- Point and Vector Object Count
- 843
- Spatial Reference Information
- Horizontal Coordinate System Definition
- Geographic
- Latitude Resolution
- 0.000005
- Longitude Resolution
- 0.000005
- Geographic Coordinate Units
- Decimal degrees
- Geodetic Model
- Horizontal Datum Name
- WGS84
- Ellipsoid Name
- Geodetic Reference System 80
- Semi-major Axis
- 6378137.000000
- Denominator of Flattening Ratio
- 298.257224
- Vertical Coordinate System Definition
- Altitude System Definition
- Altitude Datum Name
- WGS84
- Altitude Resolution
- 1.000000
- Altitude Distance Units
- meters
- Altitude Encoding Method
- Explicit elevation coordinate included with horizontal coordinates
- Entity and Attribute Information
- Entity Type
- Entity Type Label
- TIM.VMAP1AGRISTRP
- Entity Type Definition
- Points represent agricultural facilities
- Entity Type Definition Source
- DIGEST/NGA
- Attributes
- HGT
- Height Above Surface Level
- Definition Source
- DIGEST
- NAME0
- NIMA Feature Type Category Group - Industrial
- Definition Source
- NGA
- ID
- Unique Feature Identifier
- Definition Source
- Assigned
- ZV2
- Highest Z-value Elevation above a given datum to the highest portion of the feature. (-400 to 30,000 meters)
- Definition Source
- DIGEST
- F_CODEDESC
- Feature Code text description
- Definition Source
- DIGEST
- ZV2DESC
- Highest Z-value Elevation (textual description) above a given datum to the highest portion of the feature.
- Definition Source
- DIGEST
- TILE_ID
- VPF Format Tile Identifier Code
- Definition Source
- NGA
- EXSDESC
- Existence Category Term: The state or condition of the feature.
- Definition Source
- DIGEST
- Attribute Value Accuracy
- Textual descriptions linked to DIGEST FACC code list
- END_ID
- Unique Feature Identifier
- Definition Source
- Assigned
- NAME
- Alpha-Numeric code of NIMA Library (geographic coverage area) map sources
- Definition Source
- NIMA
- EXS
- Existence Category Code: The state or condition of the feature.
- Definition Source
- DIGEST
- LOCAL_NAME
- Local name applied to NIMA Feature Type Category (AGRISTRP = Agricultural Structures, Points)
- Definition Source
- NGA
- HGTDESC
- Text/numeric description for Height attribute
- Definition Source
- NGA
- F_CODE
- Feature Type (AM=Culture, Storage)
- AM020
- Grain Bin/Silo. An enclosed container, used for storing grain or fodder.
- AM030
- Grain Elevator. A tall structure, equipped for loading, unloading, processing and storing grain.
- Definition Source
- DIGEST
- SHAPE
- Feature geometry. (Coordinates defining the features.)
- Definition Source
- ESRI
- SHAPE.FID
- Internal feature number. (Sequential unique whole numbers that are automatically generated.)
- Definition Source
- ESRI
- Distribution Information
- Format Name
- Shape
- Distributor
- Harvard Geospatial Library
- Name
- Metadata Reference Information
- Metadata Date
- 20050210
- Metadata Contact
- Contact Information
- Contact Person Primary
- Contact Person
- Contact Organization
- Harvard Geospatial Library
- Contact Address
- Address
- Harvard University Library
- Address
- Office For Information Systems
- Address
- 1280 Massachusetts Avenue
- 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
