Vector Map Level 0 (DIGITAL CHART OF THE WORLD) METADATA
LONG FORM

IDENTIFICATION INFORMATION

Citation:
	Originator: National Imagery and Mapping Agency
	Publication Date: 1997 01
	Title: Vector Map Level 0 (Digital Chart of the World)
	Edition: 3
	Geospatial Data Presentation Form: model
	Publication Information:
		Publication Place: Fairfax, VA
		Publisher: National Imagery and Mapping Agency
		Other Citation Details: Stock Number VMAP0DATA
Description:
	Abstract: The Vector  Map (VMap) Level 0 database represents the 
third edition of the Digital Chart of the World.  The second 
edition was a limited release item published 1995 09.  The product 
is dual named to show its lineage to the original DCW, published 
in 1992, while positioning the revised product within a broader 
emerging-family of VMap products.  VMap Level 0 is a comprehensive 
1:1,000,000 scale vector basemap of the world.  It consists of 
cartographic, attribute, and textual data stored on compact disc 
read only memory (CD-ROM).  The primary source for the database is 
the National Imagery and Mapping Agency's (NIMA) Operational 
Navigation Chart (ONC) series.  This is the largest scale 
unclassified map series in existence that provides consistent, 
continuous global coverage of essential basemap features. The 
database contains more than 1,900 megabytes of vector data and is 
organized into 10 thematic layers.  The data includes major road 
and rail networks, major hydrologic drainage systems, major 
utility networks (cross-country pipelines and communication 
lines), all major airports, elevation contours (1000 foot(ft), 
with 500ft and 250ft supplemental contours), coastlines, 
international boundaries and populated places.  The database can 
be accessed directly from the four optical CD-ROMs that store the 
database or can be transferred to a magnetic media. 
	Purpose: The VMap Level 0 is a general purpose global database 
designed to support Geographic Information Systems applications.
Time Period of Content:
	Time Period Information:
		Single Date: 199701
	Currentness Reference: Publication date
Status:
	Progress: Complete
	Maintenance and Update Frequency: Biennial
Spatial Domain:
	Bounding Coordinates:
		West Bounding Coordinate: -180.0
		East Bounding Coordinate: 180.0
		North Bounding Coordinate: 90.0
		South Bounding Coordinate: -90.0
Keywords: 
	Theme:
		Theme Keyword: Vector Map
		Theme Keyword: VMap
		Theme Keyword: DCW
		Theme Keyword: digital global basemap
		Theme Keyword: GIS database
		Theme Keyword: Global digital database
		Theme Keyword: CD-ROM
	Theme Keyword: rivers
	Theme Keyword: roads
	Theme Keyword: railroads
	Theme Keyword: international boundaries
	Theme Keyword: cities
	Theme Keyword: airports
	Theme Keyword: elevations
	Theme Keyword: contours
	Theme Keyword: coastlines
	Theme Keyword: populated places
		Theme Keyword: vegetation
	Place:
		Place Keyword Thesaurus: None
		Place Keyword: global coverage
		Place Keyword: world coverage
Access Constraints: None
Use Constraints:  Cite National Imagery and Mapping Agency
Point of Contact:
	Contact Organization Primary:
		Contact Organization: National Imagery and Mapping 
Agency
		Contact Position:  ATTN: COS MS A-30
		Contact Address: 
			Address Type:  mailing and physical
				Address: 8613 Lee Highway
				City: Fairfax
				State: VA
				Postal Code: 22031
				Country: US
		Contact Voice Telephone:
		Contact Facsimile Telephone:
	Contact Instructions: Users should refer corrections, 
additions, or suggestions for improving this product to the 
Contact Organization.
Security Information:
	Security Classification System:  United States Department 
of Defense
	Security Classification: Unclassified
	Security Handling Description: Not Applicable

DATA QUALITY INFORMATION

Attribute Accuracy:
	Attribute Accuracy Report: 100 percent of attribute codes 
were reviewed against the source manuscripts. No formal effort was 
undertaken to develop a quantitative attribute accuracy statement.
Logical Consistency Report:
All data were found to be topologically correct.  No duplicate features 
are present.  All areas are completely described as depicted on the 
source manuscripts.  No undershoots or overshoots are present.  All data 
were consistently captured using the rules described in the narrative 
associated with the Data Quality Table and in the various feature table 
narrative files present at the coverage level within the library.
Completeness Report: 100 percent of features depicted on the ONC 
source materials have been captured. 100 percent of the features have 
valid attribute codes assigned to them.
Positional Accuracy:
	Horizontal Positional Accuracy:
	Horizontal Positional Accuracy Report::  The 
Horizontal Positional Accuracy Value represents overall 
accuracy.  Source chart-specific accuracies are available as 
area feature attributes in the VMap-0 data quality coverage.    
The primary accuracy analysis was performed on one chart 
only in the prototyping phase of the DCW project.
	Quantitative Horizontal Positional Accuracy 
Assessment:
	Horizontal Positional Accuracy Value: 2040
	Horizontal Positional Accuracy Explanation: 
Detailed horizontal accuracy figures were developed by 
comparing the positions of well-defined points in the 
roads, railroads, utility lines, and drainage 
coverages against sources of higher accuracy, 
measuring the offsets, and expressing differences as a 
Circular Map Accuracy figure at a 90% confidence 
interval.  This figure was independently verified by 
adding known production errors to source chart 
accuracies in a root sum square calculation.
	Vertical Positional Accuracy:
	Vertical Positional Accuracy Report:  This figure 
represents overall accuracy. Source chart-specific 
accuracies are available as area feature attributes in the 
VMap-0 data quality coverage.  
	Quantitative Vertical Positional Accuracy 
Assessment:
	Vertical Positional Accuracy Value: 152.4
	Vertical Positional Accuracy Explanation: 
Vertical accuracy figures were developed by comparing 
elevation contour locations on 1:24,000 scale maps to 
elevation values at the same location within the 
digital database.  Some manual interpolation was 
necessary to complete this test.  The analysis results 
are expressed as linear error at a 90% confidence 
interval.
Lineage: (Additional lineage data is available in the narrative table  
associated with the Data Quality Table (DQT) (called lineage.doc) and 
with the database Lineage Narrative Table (LNT).)
	Source Information: 
		Source Citation:
			Originator: National Imagery and Mapping Agency
Publication Date: See "Source Time Period of 
Content"
				Title: Operational Navigational Chart
				Geospatial Data Presentation Form: map
			Publication Information:
				Publication Place: St.Louis, MO
				Publisher: National Imagery and Mapping 
Agency
		Source Scale Denominator: 1,000,000
		Source Type of Media:  stable-base material
		Source Time Period of Content:
			Source Time Period Information:
				Range of Dates/Times: 
					Begining Date: 1974
					Ending Date: 1994
	Source Currentness Reference: Publication 
dates
		Source Citation Abbreviation: ONC
	Source Contribution:  all information found on the 
source with the exception of aeronautical data
	Process Step:
		Process Description: For the first edition DCW, stable-
based positives were produced from the original reproduction negatives 
(up to 35 per ONC sheet) these were digitized either through a scanning-
raster to vector conversion or hand digitized into vector form.  The 
vector data was then tagged with attribute information using ARC-INFO 
software. Transformation to geographic coordinates was performed using 
the projection graticules for each sheet. Digital information was edge 
matched between sheets to create large regional datasets. These were 
then subdivided into 5 x 5 tiles and converted from ARC/INFO to VPF.  
The data was then pre-mastered for CD-ROM.  QC was performed by a 
separate group for each step in the production process.  For the second 
edition, the DCW database was reprocessed in ARC/INFO for conversion to 
the VMap Level 0 format.  Updates were digitized from 19 ONC charts 
which had been revised since production of the first edition DCW.  The 
VMap Level 0 data was retiled into variable sizes from 5 x 5 near the 
equator through 5 x 90 near the poles.   
			Process Date: 199112
Process Contact: 
	Contact Organization Primary:
	Contact Organization: Environmental Systems Research 
Institute
		Contact Position: Applications Division
		Contact Address: 
			Address Type:  mailing and physical
				Address: 380 New York St.
				City: Redlands
				State: CA
				Postal Code: 92373
				Country: US
		Contact Voice Telephone: 909-793-2853
		Contact Facsimile Telephone: 909-793-5953
Process Date: 199404
Process Contact: 
	Contact Organization Primary:
	Contact Organization: Geonex
		Contact Position: 
		Contact Address: 
			Address Type:  mailing and physical
				Address: 8950 North 9th Ave.
				City: St. Petersburg
				State: FL
				Postal Code:33702 
				Country: US
		Contact Voice Telephone: (813)578-0100
		Contact Facsimile Telephone: (813)577-6946

Source Information: 
		Source Citation:
			Originator: National Imagery and Mapping Agency
				Publication Date:  199406
	Title: Digital Aeronautical Flight Information 
File
	Geospatial Data Presentation Form: model
			Publication Information:
				Publication Place: St. Louis, MO
				Publisher: National Imagery and Mapping 
Agency
		Source Type of Media:  magnetic tape
		Source Time Period of Content:
			Source Time Period Information:
				Single Dates/Times: 
					Calender Date: 1994
	Source Currentness Reference: Publication 
date
		Source Citation Abbreviation: DAFIF
	Source Contribution:  Airport records (name, ICAO, 
position, elevation, and type)
	Process Step:
	Process Description:  Transferred digitally directly 
into the VPF files.
			Process Date: 199408
Process Contact: 
	Contact Organization Primary:
	Contact Organization: Geonex
		Contact Position: 
		Contact Address: 
			Address Type:  mailing and physical
				Address: 8950 North 9th Ave.
				City: St. Petersburg
				State: FL
				Postal Code:33702 
				Country: US
		Contact Voice Telephone: 813-578-0100
		Contact Facsimile Telephone: 813-577-6946

Source Information: 
		Source Citation:
			Originator: Defense Mapping Agency
	Publication Date: "Source Time Period of 
Content"
	Title: Jet Navigational Chart
				Geospatial Data Presentation Form: map
			Series Information:
			Publication Information:
				Publication Place: St.Louis, MO
				Publisher: Defense Mapping Agency
		Source Scale Denominator:  2,000,000
		Source Type of Media:  stable-base material
		Source Time Period of Content:
			Source Time Period Information:
				Range of Dates/Times: 
					Begining Date: 1974
					Ending Date: 1991
	Source Currentness Reference: Publication 
date
		Source Citation Abbreviation: JNC
	Source Contribution:  All information found on the 
source with the exception of aeronautical data.  JNCs were 
used as source for the Antartica region only.
	Process Step:
		Process Description:  Stable-based positives were 
produced from the original reproduction negatives (up to 35 per ONC 
sheet) these were digitized either through a scanning-raster to vector 
conversion or hand digitized into vector form.  The vector data was then 
tagged with attribute information using ARC-INFO software. 
Transformation to geographic coordinates was performed using the 
projection graticules for each sheet. Digital information was edge 
matched between sheets to create large regional datasets. These were 
then subdivided into 5 x 5 tiles and converted from ARC/INFO to  VPF.  
The data was then pre-mastered for CD-ROM.  QC was performed by a 
separate group for each step in the production process.
			Process Date: 199112
Process Contact: 
		Contact Organization Primary:
	Contact Organization: Environmental Systems Research 
Institute
		Contact Position: Applications Division
		Contact Address: 
			Address Type:  mailing and physical
				Address: 380 New York St.
				City: Redlands
				State: CA
				Postal Code: 92373
				Country: US
		Contact Voice Telephone: 909-793-2853
		Contact Facsimile Telephone: 909-793-5953
Source Information: 
		Source Citation:
			Originator: USGS EROS Data Center
				Publication Date: 
				Title: Advance Very High Resolution Radiometer
	Geospatial Data Presentation Form: remote 
sensing image
			Publication Information:
				Publication Place: Sioux Falls, SD
				Publisher: EROS Data Center
		Source Scale Denominator: 1,000,000
		Source Type of Media:  magnetic tape
		Source Time Period of Content:
			Source Time Period Information:
				Range of Dates/Times: 
					Begining Date: 199003
					Ending Date: 199011
	Source Currentness Reference: Publication 
date
		Source Citation Abbreviation: AVHRR
	Source Contribution:  6 vegetation types covering the 
continental US.and Canada
	Process Step:
		Process Description:  Daily AVHRR images were averaged 
for two week time periods over the entire US growing season. These 
averaged images, their rates of change, elevation information, and other 
data were used to produce a single land classification image of the 
contental US. The VMap-0 data set extended this coverage over the 
Canadian land mass, however vegetation classification was further 
subdivided into nine vegetation types.
			Process Date: 199402
	Source Produced Citation Abbreviation: EROS 
data
Process Contact: 
	Contact Organization Primary:
		Contact Organization: USGS Eros Data Center
		Contact Position:
		Contact Address: 
			Address Type:  mailing and physical
				Address:
				City: Sioux Falls
				State: SD
				Postal Code:
				Country: US
		Contact Voice Telephone:
		Contact Facsimile Telephone:
Process Step:
		Process Description:   The Eros data (raster files) 
were converted to vector polygon, splined (remove stairstepping), 
thinned (all ploygons under 2km2 were deleted), and tied to existing DCW 
polygons (water bodies, built-up areas).  The resulting file was tiled 
and converted to a VPF Vegetation coverage for use in the DCW. All 
processing was performed using ARC-INFO software.  For VMap-0 this 
process was repeated over the Canadian land mass.  The difference in 
classification scheme has resulted in irreconciliable data differences 
along the US-Canadian border.  The next version of VMap-0 will correct 
this discrepancy.
			Process Date: 199412
	Source Produced Citation Abbreviation: VMap-0 
Vegetation Coverage
Process Contact: 
	Contact Organization Primary:
	Contact Organization: Geonex
		Contact Position: 
		Contact Address: 
			Address Type:  mailing and physical
				Address: 8950 North 9th Ave.
				City: St. Petersburg
				State: FL
				Postal Code: 33702
				Country: US
		Contact Voice Telephone: 813-578-0100
		Contact Facsimile Telephone: 813-577-6946


SPATIAL DATA ORGANIZATION INFORMATION

Direct Spatial Reference Method: Vector
	Point and Vector Object Information:
		VPF Terms Description:
			VPF Topology Level: 3
				VPF Point and Vector Object Type: node, 
edge, face
			
SPATIAL REFERENCE INFORMATION:

Horizontal Coordinate System:
	Horizontal Coordinate System Definition:
		Geographic:
			Latitude Resolution: .000001
			Longitude Resolution: .000001
	Geographic Coordinate Units: Decimal degrees
			Geodetic Model:
				Horizontal Datum Name: WGS 84
				Ellipsoid Name: WGS 84
				Semi-major Axis: 6378137
	Denominator of Flattening Ratio: 
298.257223563
	Vertical Coordinate System:
		Altitude System Definition:
			Altitude Datum Name: Mean Sea Level
			Altitude Distance Units: 1.0
			Altitude Encoding Methods: meters

ENTITY AND ATTRIBUTE INFORMATION

Overview Description:
	Entity and Attribute Overview: The DCW used a product-
specific attribute coding system that is composed of TYPE and 
STATUS designators for area, line, and point features; and LEVEL 
and SYMBOL designators for text features.  The TYPE attribute 
specifies what the feature is, while the STATUS attribute 
specifies the current condition of the feature.  Some features 
require both a TYPE and STATUS code to uniquely identify their 
characteristics.  In order to uniquely identify each geographic 
attribute in the DCW, the TYPE and STATUS attribute code names are 
preceded by the two letter coverage abbreviation and a two letter 
abbreviation for the type of graphic primitive present.  VMap-0 
data is attribute coded in accordance with Feature and Attribute 
Coding Catalog (FACC).  The DCW Type/Status codes were mapped into 
the FACC coding scheme.  A full description of FACC may be found 
in Digital Geographic Information Exchange Standard Edition 1.2, 
January 1994.
	Entity and Attribute Detail Citation: Entities (features) 
and Attributes for DCW are fully described in: Department of 
Defense, 1992, Military Specification Digital Chart of the World 
(MIL-D-89009): Philadelphia, Department of Defense, Defense 
Printing Service Detachment Office.  VMap-0 is described in:  
Department of Defense, Military Specification, Vector  Map (VMap) 
Level 0 (MIL-V-89039), 9 Feb 1995. 

DISTRIBUTION INFORMATION

Distributor:
	Contact Information:
		Contact Organization: NIMA 
				Contact Position:  ATTN: CC, MS D-16
				Contact Address: 
					Address Type: mailing and physical 
						Address: 6001 MacArthur Blvd.
						City: Bethesda
						State: MD
						Postal Code: 20816-5001
						Country: US
		Contact Voice Telephone: 301-227-2495
		Contact Facsimile Telephone: 301-227-2498
Resource Description: (Stock Number) VMAP0DATA
Distribution Liability: None 
Standard Order Process: 
	Digital Form:
		Digital Transfer Information:
			Format Version Name: Vector Product Format
				Format Version Date: 19930930
				Format Specification: Military Standard 
Vector Product Format (MIL-STD-2407).  The current version of this 
document is dated 28 June 1996.  Edition 3 of VMap-0 conforms to a 
previous version of the VPF Standard as noted.  Future versions of 
VMap-0 will conform to the current version of VPF Standard.
			Digital Transfer Option:
				Offline Option: 
					Offline Media: CD-ROM
					Recording Format: ISO 9660
	Fees: Not Applicable
	Ordering Instructions: must have customer account number
Distributor:
	Contact Information:
		Contact Organization: USGS Map Sales
				Contact Address: 
					Address Type: mailing
						Address: Box 25286
						City: Denver
						State: CO
						Postal Code: 80225
						Country: US
		Contact Voice Telephone: 303-236-7477
		Contact Facsimile Telephone: 303-236-1972

	Fees: $82.50 per four disk set
	Ordering Instructions: Payment (check, money order, purchase 
order, or Government account) must accompany order.  Make all 
drafts payable to Dept. of the Interior- US Geological Survey.

METADATA REFERENCE INFORMATION

Metadata Date: 19970110
Metadata Contact:
	Contact Organization: National Imagery and Mapping Agency
		Contact Position:  ATTN: COS MS A-30
		Contact Address: 
			Address Type: mailing and physical 
				Address: 8613 Lee Highway
				City: Fairfax
				State: VA
				Postal Code: 22031
				Country: US
		Contact Voice Telephone:
		Contact Facsimile Telephone:
Metadata Standard Name: Federal Geographic Data Committee Content 
Standard for Spatial Metadata
Metadata Standard Version: 19940608