ARC/INFO coverage of hydrologic units in the Upper Mississippi/Missouri
River Basin at 1:2,000,000 scale
Citation_Information:
Originator: Scientific Assessment and Strategy Team (SAST)
Publication Date: 19950526
Title: HUC2M ARC/INFO Coverage
Geospatial _Data_Presentation_Form: map
Online_Linkage: http://edcwww.cr.usgs.gov/sast-home.html
Description:
The SAST ARC/INFO database is a comprehensive vector basemap of the Upper
Mississippi/Missouri River Basin and contains attribute data suitable for
performing a wide range of analyses and for generating thematic maps for
counties and states throughout the flood area.
Abstract:
On January 10, 1994, the Scientific Assessment and Strategy Team (SAST)
joined in the effort to provide scientific advice and assistance to
officials responsible for making decisions with respect to the flood
recovery in the Upper Mississippi River Basin.
This ARC/INFO polygon coverage contains Hydrologic Unit Boundaries and
Codes for the Upper Mississippi/Missouri River Basin at 1:2,000,000 scale.
This coverage is part of series of 1:2,000,000-scale basemaps covering the
United States. Layers in this series include:
COUNTY -- County boundaries.
WATERBOD -- Water Bodies.
STREAM -- Streams.
HUC -- Hydrologic cataloging units (basins).
Purpose:
The objectives for the SAST were to develop a database of readily available
data to support map production, scientific analysis, and decision making;
to produce maps showing base information and vulnerability to flooding; and
to prepare reports documenting the products of SAST and the methodology and
analysis used to produce them, and identifying the ongoing monitoring,
research, modeling, data management and distribution requirements needed to
support integrated river basin management.
Supplemental_Information:
In ARC/INFO the Copy command was used to off-load individual coverages
together with their associated INFO files.
ARC is the main program environment in ARC/INFO. It contains commands
which start each of the other subsystems and also has extensive
capabilities.
INFO is a complete relational database manager for the tabular data
associated with geographic features in map coverages. It provides
facilities for data definition of new data files, use of existing data
files, data entry and update, and sort and query.
ARC/INFO keeps track of and updates map feature attribute tables which are
stored as INFO files. It maintains the relationships between each map
feature and a corresponding tabular record.
ARCPLOT is the interactive cartographic and mapping subsystem of ARC/INFO.
Spatial_Domain:
Bounding_Coordinates: Geographic coordinates (latitude/longitude)
in decimal degrees.
West_Bounding_Coordinate: 36.0 -111.0
East_Bounding_Coordinate: 36.5 -86.5
North_Bounding_Coordinate: 48.5 -84.0
South_Bounding_Coordinate: 49.5 -114.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Hydrologic Units
Theme_Keyword: Hydrology
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the identification of
the States, the District of Columbia and the outlying areas of the
United States, and associated areas (Federal Information Processing
Standard 5-2):Washington ,D. C., National Institute of Standards
and Technology.
Place_Keyword: US
Place_Keyword: Missouri River
Place_Keyword: Upper Mississippi River Basin
Place_Keyword_Thesaurus:
Access_Constraints: None
Use_Constraints:
Acknowledgement of the U.S. Geological Survey and the Scientific
Assessment and Strategy Team would be appreciated in products derived
from these data. Persons intending to engage in activities involving
modifications within or adjacent to wetland areas should seek the advice
of appropriate Federal, State or local agencies concerning specified
agency regulatory programs and proprietary jurisdictions that may affect
such activities.
Contact_Information:
Point_of_Contact: Jacqueline Klaver
Contact_Position: Senior Scientist
Contact_Address:
Address_Type:
Address: SAST
U.S. Geological Survey
EROS Data Center
City: Sioux Falls
State: SD
Postal_Code: 57198
Country: USA
Contact_Voice_Telephone: 605 594 6961
Contact_Facsimile_Telephone: 605 594 6589
Contact_Electronic_Mail: jklaver@edcserver1.cr.usgs.gov
Hours_of-Service: 0730-1615
Data_Set_Credit:
Scientific Assessment and Strategy Team
U. S. Geologic Survey
Native_Data_Set_Environment:
UNIX ARC/INFO
Cross_Reference:
Upper Mississippi/Missouri River Basin ARC/INFO coverages in the
Scientific Assessment and Strategy Team (SAST) database.
During ARC/INFO coverage development several modifications were made to the
source data in order to generate a database with a common scale, uniform level
of resolution, consistent coding scheme, and comparable (standardized)
measurement data.
Attribute_Accuracy:
Attribute_Accuracy_Report:
No independent evaluation of the attribute or positional accuracy of
the source data was undertaken.
Attribute_Accuracy_Explanation:
The accuracy of most attributes has not been explicitly tested against
independent sources.
Logical_Consistency_Report:
All data were found to be topologically correct. No duplicate features are
present. All polygons are closed, and all lines intersect where intended.
No undershoots or overshoots are present.
Limitations_of_Data:
Accuracy is good at 1:2,000,000 or smaller. Do not use this coverage for
any analytical work. Use the coverage HUC250 instead
References_Cited:
Seaber, Paul R., Kapinos, F. Paul, and Knapp, George L., 1987, Hydrologic
Unit Maps: U. S. Geological Survey Water-Supply Paper 2249, 63p.
Completeness_Report:
Data completeness reflects the content of the source, State 1:500,000-scale
Hydrologic Unit Maps. Features may have been eliminated or generalized on the
source graphic, due to scale and legibility constraints.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal positional accuracy is based upon the Unit Maps produced by the
U.S. Geological Survey for the development of the GIRAS data. When the
data was processed in ARC/INFO for edgematching, the ARC tolerance command
was used to set and examine the tolerances. Positional accuracy between
the data set and ARC data files
Horizontal_Positional_Accuracy_Value: Approx. 1 km.
Lineage:
Source_Information:
Data derived primarily from 1:500,000 State Base Hydrologic Unit Maps
Source_Citation:
State Hydrological Unit Maps, 1:500,000, Lambert Conformal Projection,
U.S. Geologic Survey.
Type_of_Source_Media: map
Source_Scale_Denominator: 500,000
Originator: U.S. Geologic Survey
Process_Step:
Process_Description:
The interchange file was downloaded to a UNIX system. The ARC command
IMPORT created a coverage along with the INFO data file.
To recreate coverage topology the BUILD command was used:
BUILD creates or updates a feature attribute table for a
coverage. It defines polygon and arc-node topology
when the POLY option is used.
Steps performed prior to this project:
a) 1:2,000,000 scale-stable base map plots were obtained from the USGS
National Mapping Division. These plots were in the Lambert Conformal
Conic Projection, using 1:500,000 State Base Map projection parameters
Plot data included drainage and latitude-longitude grid. Fifteen
sectional plots were done following National Atlas 1:2,000,000
sectional boundaries.
b) Individual State 1:500,000 Hydrologic Unit Maps (Lambert
Conformal Conic Projection) were photo-reduced to 1:2,000,000
c) Hydrologic Unit Boundaries were compiled and edgematched on
scale-stable 1:2,000,000 plots
d) Boundaries were digitized by Automated Datatron, Hyattesville,
MD., and NMD contract digitizing firm.
e) Digital data from contractor was converted to an ARC/INFO
coverage, checked, and corrected.
f) Detailed annotated listing of locations where Hydrologic Unit
Boundaries and streams are coincident or where 1:2,000,000 DLG streams
are in error was compiled.
In revision 1.1, the coverage described above was intersected with the
1:2,000,000 coverage of U.S. counties (Revision 2.0) to identify offshore
and onshore areas. (Other county attributes were excluded.) This was
done with a fuzzy tolerance of 2 meters. A small portion of the
original map which overlaid part of the Canadian Great Lakes was
deleted. The attributes were renamed and expanded at this time.
The Upper Mississippi/Missouri River Basin represented in the ARC/INFO
coverage HUC2M.
Direct_Spatial_Reference_Method:
Point and Vector
Point_and_Vector_Object_Information:
Number of Points: 969
Number of lines: 32480
Number of line segments: 79716
Number of Polygons: 970
Point_Object_Information:
Number of control points: 4
SDTS_Terms_Description:
An area is a generic term for bounded, continuous, two-dimensional object
that may or may not include its boundary.
The attributes (or items) in the ARC/INFO feature attribute tables contain
different types of values; specifically, measurements, codes, flags, and
names.
Detailed_Description:
Entity_Type: An ARC/INFO polygon coverage
Entity_Type_Label: HUC2M.PAT
Entity_Type_Definition: Polygon attribute table
Entity_Type_Definition_Source: ARC/INFO-generated attributes and
items
DATAFILE NAME: HUC2M.PAT
5 ITEMS: STARTING IN POSITION 1
COL ITEM NAME WDTH OPUT TYP N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 HUC2M# 4 5 B -
13 HUC2M-ID 4 5 B -
17 HUC 8 8 I -
** REDEFINED ITEMS **
17 HUC:2 2 2 I -
17 HUC:4 4 4 I -
17 HUC:6 6 6 I -
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of polygon in square coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values: Positive real numbers
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of polygon in coverage units
Attribute_Definition_Source: Computed
Attribute_Domain_Values: Positive real numbers
Attribute_Label: HUC2M#
Attribute_Definition: Internal feature number
Attribute_Definition_Source: Computed
Attribute_Domain_Values: Sequential unique positive integer
Attribute_Label: HUC2M-ID
Attribute_Definition: User-assigned feature number
Attribute_Definition_Source: User-defined
Attribute_Domain_Values: Integer
Attribute_Label: HUC
Attribute_Definition: Hydrologic or cataloging unit
Attribute_Definition_Source: Federal Information Processing Standard
Attribute_Domain_Values: 01000000 - 18999999
Attribute_Label: HUC2
Attribute_Definition: Water Resources Region
Attribute_Definition_Source: Federal Information Processing Standard
Attribute_Domain_Values: 01-18
Attribute_Label: HUC4
Attribute_Definition: Water Resources Subregion
Attribute_Definition_Source: Federal Information Processing Standard
Attribute_Domain_Values: 0100-1899
Attribute_Label: HUC6
Attribute_Definition: Accounting Unit
Attribute_Definition_Source: Federal Information Processing Standard
Attribute_Domain_Values: 010000-189999
Hydrologic Units are identified by an 8-digit code (HUC) which can
be subdivided as follows:
Digits Type Item Name
1-8 Cataloging Unit HUC
1-2 Water Resource Region HUC2
1-4 Subregion HUC4
1-6 Accounting Unit HUC6
Overview_Description:
Entity_and_Attribute_Overview:
A coverage is stored as a set of files in ARC/INFO where each file
contains information about a particular feature class. In order for a
coverage's features to be stored, referenced, and managed as a set, a
coverage's files are organized in a directory. The coverage name is the
directory name. The set of files that are stored for a coverage vary
depending on the set of features present in the coverage.
In INFO, the specification of the format for each record in the data file
is referred to as the Items Definition. Items are defined by their name,
the data type, the number of characters used to store values, a display
width, and (for decimal numbers) the number of decimals to display.
A coverage contains both the locational data and thematic attributes
associated with map features. In a coverage, map features are stored as
lines (arcs). Lines represent linear features like miscellaneous
transportation. Lines have length but no area (polygon) and are defined
as a string of x,y coordinate pairs with beginning and ending points.
These attributes are stored in Feature Attribute Tables. Each feature
class in a coverage has its own table: line attributes are stored in Arc
Attribute Tables (AATs).
ARC/INFO-"generated attributes" are automatically created and are
different for each coverage. The feature attribute table contain
information about and values for a particular record. An INFO table
specifies the format for each record in the data file and is referred
to as the Items Definition. Items are defined by their name, the data
type, the number of characters used to store values, a display width,
and (for decimal numbers) the number of decimals to display.
Entity_and_Attribute_Detail_Citation:
The Scientific Assessment Strategy Team (SAST), U.S. Geological
Survey, EROS Data Center, Sioux Falls, SD.
Distributor: SAST
Contact_Information:
Contact_Person: Jacqueline Klaver
Contact_Position: Senior Scientist
Contact_Address:
Address_Type:
Address: SAST
U.S. Geological Survey
EROS Data Center
City: Sioux Falls
State: SD
Postal_Code: 57198
Country: USA
Contact_Voice_Telephone: 605 594 6961
Contact_Facsimile_Telephone: 605 594 6589
Contact_Electronic_Mail: jklaver@edcserver1.cr.usgs.gov
Hours_of-Service: 0730-1615
Resource_Description:
Scientific Assessment and Strategy Team (SAST) Upper Mississippi River
Basin ARC/INFO coverage for hydrologic units at 1:2,000,000-scale
Distribution_Liability:
Although these data have been processed successfully on a computer
system at the EROS Data Center, no warranty expressed or implied is made
by the SAST or USGS regarding the utility of the data on any other
system, nor shall the act of distribution constitute any such warranty.
The Geological Survey will warrant the delivery of this product in
computer-readable format, and will offer appropriate adjustment of
credit when the product is determined unreadable by correctly adjusted
computer input peripherals, or when the physical medium is delivered in
damaged condition. Requests for adjustment of credit must be made
within 90 days from the date of this shipment from the ordering site.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE (ARC Export)
Format_Version_Number: ARC6.1
Format_Version_Date:
Format_Specification: Polygon coverage data set or layer
Format_Information_Content: Hydrologic Units at 1:2,000,000
File_Decompression_Technique: ARC6.1 import (compressed)
Transfer_Size:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
ftp edcftp.cr.usgs.gov
Enter "anonymous" at name prompt
Enter complete e-mail address at the Password prompt
cd (change) pub/data/sast (subdirectory)
Type: binary (set the file transfer mode to binary)
Type: get (to download one file) or
Type: mget (to download more than one file)
Digital_Transfer_Information:
Format_Name: PC ARC (Export)
Format_Version_Number: ARC6.1
Format_Version_Date:
Format_Specification: Polygon coverage data set or layer
Format_Information_Content: Hydrologic Units at 1:2,000,000
File_Decompression_Technique: ARC6.1 import (uncompressed)
Transfer_Size:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
ftp edcftp.cr.usgs.gov
Enter "anonymous" at name prompt
Enter complete e-mail address at the Password prompt
cd (change) pub/data/sast (subdirectory)
Type: binary (set the file transfer mode to binary)
Type: get (to download one file) or
Type: mget (to download more than one file)
Digital_Transfer_Information:
Format_Name: SDTS
Format_Version_Number:
Format_Version_Date:
Format_Specification: Area coverage data set or layer
Format_Information_Content: Hydrologic Units at 1:2,000,000
File_Decompression_Technique:
Transfer_Size:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
ftp edcftp.cr.usgs.gov
Enter "anonymous" at name prompt
Enter complete e-mail address at the Password prompt
cd (change) pub/data/sast (subdirectory)
Type: binary (set the file transfer mode to binary)
Type: get (to download one file) or
Type: mget (to download more than one file)
Digital_Transfer_Option:
Offline_Option:
Offline_Media: 3480 cartridge tape
Recording_Capacity:
Recording_Density: 1600
Recording_Density: 6250
Recording_Density_Units: characters per inch
Recording_Format:
ASCII; available unlabeled or with ANSI-standard labels.
Digital_Transfer_Option:
Offline_Option:
Offline_Media: 8mm cartridge tape
Recording_Capacity:
Recording_Density: 1600
Recording_Density: 6250
Recording_Density_Units: characters per inch
Recording_Format:
ASCII; available unlabeled or with ANSI-standard labels.
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660
Compatibility_Information:
This CD-ROM can be used with all computer operating systems that
support CD-ROM as a logical storage device. All text files on
the disc are in ASCII format. Data files are in ASCII or binary
format.
Fees:
8-mm cartridge = $70
3480 cartridge = $70
9-track tapes = $70
CD-ROM = $70
Ordering_Instructions:
Point_of Contact: Ron Risty
Contact_Position: Senior Information Scientist
Contact_Address:
Address_Type:
Address: U.S. Geological Survey
EROS Data Center
City: Sioux Falls
State: SD
Country: USA
Contact_Voice_Telephone: 605 594 6969
Contact_Facsimile_Telephone: 605 594 6589
Contact_Electronic_Mail: risty@edcserver1.cr.usgs.gov
Hours_of_ Service: 7:30am - 4:15pm
Turnaround:
One week maximum
Metadata_Date: 19950530
Metadata_Contact_Information:
Metadata_Contact_Person: Sharon M. Ivens
Metadata_Contact_Position: Information Scientist
Contact_Address:
Address_Type: mailing address
Address: U. S. Geological Survey
EROS Data Center
City: Sioux Falls
State_or_Province: South Dakota
Postal_Code: 57198
Country: USA
Contact_Voice_Telephone: 1 605 594 6035
Contact_Facsimile_Telephone: 605 594 6589
Contact_Internet_Address: ivens@edcserver1.cr.usgs.gov
Hours_of_Service: 0730-1615
Metadata_Standard_Name: Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: 1.0
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