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U.S. DEPARTMENT OF THE INTERIOR

BUREAU OF LAND MANAGEMENT

Oregon / Washington

GIS Metadata


BLM OR Quads 1:12,000 Polygon

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Bureau of Land Management
Publication_Date: 20020101
Title:
BLM OR Quads 1:12,000 Polygon
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Portland, OR
Publisher: OR BLM
Other_Citation_Details:
Quads12 (quarter quads)
Online_Linkage: http://www.blm.gov/or/gis/data.php
Description:
Abstract:
QUADS12_POLY: This theme depicts the 1:12,000 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) As described in the process steps these data were created on a regular grid of latitude/longitude to depict the 1:12,000 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.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20020101
Time of Day: unknown
Currentness_Reference:
publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -125
East_Bounding_Coordinate: -116
North_Bounding_Coordinate: 49
South_Bounding_Coordinate: 41
Keywords:
Theme:
Theme_Keyword_Thesaurus: BLM
Theme_Keyword: Management
Theme:
Theme_Keyword_Thesaurus: ISO 19115
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Quadrangles
Theme_Keyword: Lands
Theme_Keyword: Base Data
Theme_Keyword: Framework
Theme_Keyword: index
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: BLM-State
Place_Keyword: Oregon
Place_Keyword: Washington
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Corey Plank
Contact_Position: Lead Cartographer
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97201
Country: US
Contact_Voice_Telephone: (503) 808-6427
Contact_Electronic_Mail_Address: cplank@blm.gov
Native_Data_Set_Environment:
Arc/Info, AIX/UNIX
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The Ohio codes were generated based on the latitude/longitude of the SE corner of the 7.5 minute (1:24,000) polygon, while the quarter quad codes were calculated from the quarter section that the polygon represents of the 7.5 Minute quad. The qqohio was calculated by adding the Ohio code and the quarter quad (QQ) code together. The results were visually checked for accuracy.
Logical_Consistency_Report:
This theme was created by generating the lines at a .0625 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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Unknown
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Unknown
Lineage:
Process_Step:
Process_Description:
This coverage was generated in Arc/Info using a computer program that created the polygons at 3.75-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 and quarter quad label (QQOHIO), as well as the parsed Ohio code (OHIO), first 5 digits, and Quarter quad (QQ), last two digits, code.
Process_Date: 20000701
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Spatial_Data_Organization_Information:
Indirect_Spatial_Reference_Method:
Oregon Washington
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 20736
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: 3.75-minute Quad Polygons
Entity_Type_Definition:
Polygons at intervals of 3.75 minutes of latitude and longitude
Entity_Type_Definition_Source:
BLM
Attribute:
Attribute_Label: objectid
Attribute_Definition:
Internal feature number.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: ohio
Attribute_Definition:
The USGS Ohio code for the 24k (7.5-minute) quad, with the row/column coding listed first.
Attribute_Definition_Source:
BLM
Attribute_Domain_Values:
Unrepresentable_Domain:
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:
Attribute_Label: qq
Attribute_Definition:
The cardinal directive portion of the 7.5 minute quad.
Attribute_Definition_Source:
BLM
Attribute_Domain_Values:
Unrepresentable_Domain:
The section of the 7.5 minute quad where the quad is broken in to four equal portions. A name up to 2 characters long. A value of one of four NE, NW, SE, SW.
Attribute:
Attribute_Label: qqohio
Attribute_Definition:
The USGS Ohio code for the 24K (7.5 minute X 7.5 minute) quad, plus the quarter quad delineation (NE, NW, SE, SW)
Attribute_Definition_Source:
BLM
Attribute_Domain_Values:
Unrepresentable_Domain:
Quarter quad code is comprised of the Ohio code and the Quarter section. Ohio Code for the quad, with the row/column coding listed first; for example, A244117NE (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). The section of the 7.5 minute quad. Where the quad is broken in to four equal portions. A name up to 2 characters long. A value of one of four NE, NW, SE, SW.
Attribute:
Attribute_Label: shape
Attribute_Definition:
Feature geometry.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Coordinates defining the features.
Attribute:
Attribute_Label: SHAPE_Length
Attribute_Definition:
Length of feature in internal units.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: SHAPE_Area
Attribute_Definition:
Area of feature in internal units squared.
Attribute_Definition_Source:
ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Positive real numbers that are automatically generated.
Overview_Description:
Entity_and_Attribute_Overview:
There are three attributes and descriptions, for the most part two attributes that are part of one, the Ohio code of a quad and the Quarter section of the quad. The attributes Ohio code and Quarter quad are portions of the QQOHIO code attribute. The format of the quad code is translated from the format typically provided by USGS. Translation is 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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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Eric Hiebenthal
Contact_Position: GIS Data Management Specialist
Contact_Address:
Address_Type: mailing
Address:
P.O Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208
Country: US
Contact_Voice_Telephone: 503-808-6340
Contact_Facsimile_Telephone: 503-808-6419
Contact_Electronic_Mail_Address: ehiebent@blm.gov
Contact Instructions:
contact instructions
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.
Standard_Order_Process:
Fees: Contact distributor.
Ordering_Instructions:
Data are only available through the Oregon/Washington State office of the Bureau of Land Management.
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Metadata_Reference_Information:
Metadata_Date: 20030101
Metadata_Review_Date: 20141114
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management, Oregon State Office
Contact_Person: Roger Mills
Contact_Position: GIS Specialist
Contact_Address:
Address_Type: mailing
Address:
P.O. Box 2965
City: Portland
State_or_Province: OR
Postal_Code: 97208
Country: US
Contact_Voice_Telephone: (503) 808-6340
Contact_TDD/TTY_Telephone: tdd/tty phone
Contact_Facsimile_Telephone: (503) 808-6419
Contact_Electronic_Mail_Address: r2mills@blm.gov
Hours_of_Service: 8:00-4:00
Contact Instructions:
None
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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