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U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


BLM OR Quads 1:24,000 (7.5-Minute) Polygon
FGDC Metadata
Show Definitions
Description | Spatial | Data Structure | Data Quality | Data Source | Data Distribution | Metadata
Description
Citation
Information used to reference the data.
Title: BLM OR Quads 1:24,000 (7.5-Minute) Polygon
Originators: BLM and USGS
Publisher: OR BLM
Publication place: Portland, OR
Publication date: 19990101
Data type: vector digital data
Other citation details:
Quads24
Description
A characterization of the data, including its intended use and limitations.
Abstract:
QUADS24_POLY: This theme depicts the 1:24,000 quadrangles for Oregon and Washington as defined in North American Datum 1927 (NAD27). These quads show the approximate extent of and align with the NAD27 corner ticks as displayed on USGS Topoquads.
Purpose:
Resource Management Planning
Supplemental information:
BLM (Bureau of Land Management), USGS (United States Geological Survey), GNIS (Geographical Names Information System), NGNDB (National Geographic Names Database) As described in the process steps these data were created on a regular grid of latitude/longitude to depict the 1:24,000 quadrangles covering Oregon and Washington and the surrounding areas as defined in North American Datum 1927 (NAD27). Due to the fact the dataset was originally created in NAD27 the values of coordinates defining the corners of the quads will only be those of the definition in the original datum. Once data is projected to a different datum the values will be correctly modified mathematically to reflect the change to the new projection. These quads show the approximate extent of the USGS topographic quadrangles. Since this data is constructed from corner points with straight lines connecting the corners, it does not take into account the curve between corner points introduced by the use of the UTM projection used to produce the topoquad maps. Thus this dataset is only a depiction of the extent of the topoquad. The corners of each of these quadrangles should align with the NAD27 ticks displayed on USGS topoquads in any projection used.
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: Bureau of Land Management
Person: Corey Plank
Position: Lead Cartographer
Phone: (503) 808-6427
Email: cplank@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97201
County: US
Data Type
How the data are represented, formatted and maintained by the data producing organization.
Data type: vector digital data
Native dataset environment: Arc/Info, AIX/UNIX
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Date: 19990101 Time: unknown
Currentness reference:
publication date
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: Unknown
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: Framework, Quadrangles, quads24_poly, Lands, Base Data
Keyword thesaurus: None
Theme:
Keywords: Management
Keyword thesaurus: BLM
Theme:
Keywords: imageryBaseMapsEarthCover
Keyword thesaurus: ISO 19115
Theme:
Keywords: imageryBaseMapsEarthCover
Keyword thesaurus: ISO 19115 Topic Categories
Place:
Keywords: Oregon, Washington
Keyword thesaurus: BLM-State
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
PUBLIC DATA: None, these data are considered public domain.
Use constraints:
These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived, and both scale and accuracy may vary across the data set. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office from which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This data may be updated by the BLM without notification.
Spatial Reference Information
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Unprojected coordinates (geographic)
Boundary Coordinate
West -125 (latitude)
East -116 (latitude)
North 49.5 (longitude)
South 41.5 (longitude)
Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute overview:
There are two attributes and descriptions, for the most part identical, of the Ohio code of a quad. The second attribute (ALT_OHIOCODE) is in the format provided by USGS. Translation to the format used in the first attribute (OHIOCODE) was required for use in many database programs (e.g. Informix, Oracle) because often, when dealing with a character field, the database program will not accept a numeral in the first space.

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Direct spatial reference method: Vector
Indirect spatial reference method: Oregon Washington
Attributes of 7.5-minute Quad Polygons
Detailed descriptions of entity type, attributes, and attribute values for the data.
Description:
Polygons at intervals of 7.5 minutes of latitude and longitude
Source:
BLM
Attributes
objectid
Definition:
Internal feature number.
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
alt_ohiocode
Definition:
The USGS Ohio code for the 24k (7.5-minute) quad, with the row/column coding listed last.
Attribute values: Ohio Code for the quad, with the row/column coding listed last; for example, 44117A2 (in which the 44 is the latitude, 117 the longitude of the SE corner of a one degree by one degree block; 'A" refers to the first 7.5' row and '2' refers to the second 7.5' column, as measured from the SE corner.
Attribute definition source:
BLM
name
Definition:
The name of the 24k quad.
Attribute values: A name up to 30 characters long. This will be the most current name given to a 24k quad, as determined by a query of the GNIS database.
Attribute definition source:
BLM
ohiocode
Definition:
The USGS Ohio code for the 24k (7.5-minute) quad, with the row/column coding listed first.
Attribute values: Ohio Code for the quad, with the row/column coding listed first; for example, A244117 (in which the 44 is the latitude, 117 the longitude of the southeast corner of a one degree by one degree block; 'A' refers to the first 7.5' row and '2' refers to the second 7.5' column, as measured from the southeast corner).
Attribute definition source:
BLM
old_name
Definition:
The alternative name of the 24K quad, usually the old name of a quad that has been renamed.
Attribute values: A name up to 30 characters long. A value will only be present if there is a known previous name or alternative name for the quad and that name can be verified with the USGS.
Attribute definition source:
BLM
q100
Definition:
The USGS Ohio code for the 100K (1 degree X .5 degree) quad.
Attribute values: 100K Ohio code for the quad; for example, E145120 (in which the 45 is the latitude, 120 the longitude of the southeast corner of a one degree by one degree block; 'E' refers to the fifth 7.5' row and '1' refers to the first column in a 1 degree x 1 degree quad, as measured from the southeast corner). All 100K Ohio codes begin with either 'A1' or 'E1', as this is derived from the 7.5-minute quad located in the southeast corner of the 100K quad.
Attribute definition source:
BLM
shape
Definition:
Feature geometry.
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
SHAPE_Length
Definition:
Length of feature in internal units.
Attribute values: Positive real numbers that are automatically generated.
Attribute definition source:
ESRI
SHAPE_Area
Definition:
Area of feature in internal units squared.
Attribute values: Positive real numbers that are automatically generated.
Attribute definition source:
ESRI
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
Feature class
Type: GT-polygon composed of chains
Count: 4657
Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
This theme was created by generating the lines at a .125 degree interval. There are no node errors or open polygons. This theme was built with polygon topology. The original defined datum is NAD27.
Completeness report:
This theme covers all lands in Oregon and Washington as well as parts of California, Nevada, Idaho, British Columbia, Alberta and the Pacific Ocean.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
The Ohio codes were generated based on the latitude/longitude of the SE corner of the polygon, while the alternative Ohio codes were calculated from the original, moving the first two characters to the end of the string. The common names were attributed by relating a GNIS database to the Ohio codes. The alternative common names were attributed by relating a USGS database to the Ohio codes, using only those names that did not match the original common names. The Q100 Ohio codes were generated based on the latitude/longitude of the SE corner of the 100K quad that the 7.5-minute quad fell in. The results were visually checked for accuracy.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
Unknown
Vertical accuracy report:
Unknown
Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
USGS NGNDB
Title: National Geographic Names DataBase
Originators: USGS
Publication date: 19980301
Media: None
Source contribution:
Attributes
USGS Map Name
Title: USGS 7.5 Minute Quadrangles
Originators: USGS
Publication date: 19940501
Map scale denominator: 24000
Media: hardcopyPaper
Source contribution:
Attributes
Beginning date: unknown
Ending date: 19940501 Ending time: unknown
Currentness reference:
publication date
BLM QUADS24
Title: BLM QUADS24
Originators: BLM
Publication date: 19990101
Map scale denominator: 24000
Media: onLine
Source contribution:
Lines
Date: 19990101 Time: unknown
Currentness reference:
publication date
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
The source coverage was generated in Arc/Info using a computer program that created the polygons at 7.5-minute intervals of latitude and longitude. Another computer program used the latitude/longitude of the SE corner of the polygons to calculate their Ohio codes. The Ohio codes were then translated to alternate Ohio codes by moving the first two characters in the string to the end of the string. The GNIS NGNDB was related to the Ohio codes to populate the common names field. GNIS NGNDB was compared to a USGS file, and where quad names disagreed, the name from the USGS file populated the alternate name field. The Q100 Ohio code field was populated from the Ohio code of the 7.5-minute quad in the SE corner of each 100K quad.
Organization: ORSO BLM/Titan Systems
Person: Eric Hiebenthal
Position: GIS Data Specialist
Phone: 503-808-6565
Email: ehiebent@blm.gov
Address type: mailing
Address:
PO Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Process date: 19990901
Process Step 2
Process description:
Data was reprojected to Geographic NAD83 and loaded into the BLM corporate SDE instances as a stand alone feature class.
Organization: Bureau of Land Management, OSO
Person: Bryant Mecklem
Position: SDE Administrator
Phone: (503) 808-6506
Email: bmecklem@blm.gov
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Process date: 20050101
Data Source used
quads24
Data Source produced
quads24_poly
Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Downloadable Data
Distribution liability:
The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: Bureau of Land Management
Person: Eric Hiebenthal
Position: GIS Data Management Specialist
Phone: 503-808-6340
Fax: 503-808-6419
Email: ehiebent@blm.gov
Instructions:
contact instructions
Address type: mailing
Address:
P.O Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Standard Order Process
Common ways in which data may be obtained.
Fees: Contact distributor.
Ordering instructions:
Data are only available through the Oregon/Washington State office of the Bureau of Land Management.
Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20051122
Last metadata review date: 20141114
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: Bureau of Land Management, Oregon State Office
Person: Roger Mills
Position: GIS Specialist
Phone: (503) 808-6340
Fax: (503) 808-6419
Telecommunications Device or Teletypewriter (TDD/TTY) phone: tdd/tty phone
Email: r2mills@blm.gov
Hours of service: 8:00-4:00
Instructions:
None
Address type: mailing
Address:
P.O. Box 2965
City: Portland
State or Province: OR
Postal code: 97208
County: US
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standard for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.0
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.