Spatial Data Management System Line Layer, Surveyed Lines, Alaska

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Alaska State Office, Bureau of Land Management
Publication_Date: Unpublished Material
Title:
Spatial Data Management System Line Layer, Surveyed Lines, Alaska
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
This dataset is a spatial representation of the Public Land Survey System (PLSS) in Alaska, generated from land survey records. The data represents a seamless spatial portrayal of land parcels, their legal descriptions, corner positioning and markings, and survey measurements. This data is intended for mapping purposes only and is not a substitute or replacement for the legal land survey records or other legal documents.
Measurement and attribute data are collected from survey records using data entry screens into a relational database. The database design is based upon the FGDC Cadastral Content Data Standard. Corner positions are derived by geodetic calculations using measurement records. Closure and edgematching are applied to produce a seamless dataset. The resultant features do not preserve the original geometry of survey measurements, but the record measurements are reported as attributes. Additional boundary data are derived by spatial capture, protraction and GIS processing. The spatial features are stored and managed within the relational database, with active links to the represented measurement and attribute data.
Purpose:
This dataset was created to provide an accurate, seamless portrayal of the PLSS network, based upon survey records. The dataset is intended for use as a base layer for mapping purposes, and as a framework for the portrayal of land ownership
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: Daily
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -172.143382
East_Bounding_Coordinate: -119.427022
North_Bounding_Coordinate: 71.376236
South_Bounding_Coordinate: 54.560274
Keywords:
Theme:
Theme_Keyword_Thesaurus: BLM-THEME
Theme_Keyword: Framework
Theme_Keyword: Land
Theme_Keyword: Survey
Theme_Keyword: PLSS
Theme_Keyword: GCDB
Place:
Place_Keyword_Thesaurus: State
Place_Keyword: Alaska
Access_Constraints:
Discretionary, contains no sensitive information - generally considered releaseable.
Use_Constraints:
Accuracy published on or derived from BLM's official survey records. Please refer to BLM's official survey records for specific bearing and distance information.
Any hardcopies or published datasets using these data shall clearly indicate their source. Any users wishing to modify the data are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the BLM. Any discrepancies or errors in this data should be reported to John_Montgomery@ak.blm.gov
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John Sroufe
Contact_Organization: Branch of Spatial Records
Contact_Position: Chief, Branch of Spatial Records
Contact_Address:
Address_Type: mailing address
Address: 222 W. 7th Ave #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99513
Country: USA
Contact_Voice_Telephone: 907-271-5481
Contact_Facsimile_Telephone: 907-271-4549
Contact_Electronic_Mail_Address: jsroufe@ak.blm.gov
Hours_of_Service: 0800 - 1630
Browse_Graphic:
Browse_Graphic_File_Name: d:browse_graphicsdms_lines.gif
Browse_Graphic_File_Description: Surveyed Lines in SDMS
Browse_Graphic_File_Type: GIF
Native_Data_Set_Environment:
Microsoft Windows NT Version 4.0 (Build 1381) Service Pack 6; ESRI ArcCatalog 8.1.1.649

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The id of the line is the only non-system generated attibute in the data set. This attribute correlates directly with the tabular data used to construct the line boundary.
Logical_Consistency_Report:
Arc-node topology exists
All survey lines are based on either known or derived corners (points) determined through geodetic calculations. Boundaries are constructed from corners and polygons are built from the resulting lines.
Completeness_Report:
Data collection is complete as of the date of collection. This metadata describes a snapshot of the data current as of the date of publication.
Lineage:
Process_Step:
Process_Description:
ArcInfo Processing: The data exported from database via an XML file is parsed and used to create ArcInfo point and line generate files.
A line coverage is created from the appropriate generate file and the points added using ArcEdit. Topology is built and the resulting coverage is projected to Alaska Albers.
If interesections are detected during the build, the source data is examined to determine if errors exist in the coordinate data exported from the SDMS database. Standard processing procedures require a build rather than clean to create topology.
Process_Date: Not complete
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Varner
Contact_Organization: Branch of Spatial Records
Contact_Position: Spatial Database Administrator
Contact_Address:
Address_Type: mailing and physical address
Address: 222 W 7th Ave #13
Address: 222 W 7th Ave #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99513
Country: USA
Contact_Voice_Telephone: (907) 271-5799
Contact_Facsimile_Telephone: (907) 271-4549
Contact_Electronic_Mail_Address: Tim_Varner@ak.blm.gov
Hours_of_Service: 0800 - 1630
Process_Step:
Process_Description:
ArcSDE Processing: Coverages are loaded into an ArcSDE Feature Dataset using the cov2sde utility with the append option.
Process_Date: Not complete
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Varner
Contact_Organization: Branch of Spatial Records
Contact_Position: Spatial Database Administrator
Contact_Address:
Address_Type: mailing and physical address
Address: 222 W 7th Ave #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99513
Country: USA
Contact_Voice_Telephone: (907) 271-5799
Contact_Facsimile_Telephone: (907) 271-4549
Contact_Electronic_Mail_Address: Tim_Varner@ak.blm.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 27608

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 55.000000
Standard_Parallel: 65.000000
Longitude_of_Central_Meridian: -154.000000
Latitude_of_Projection_Origin: 50.000000
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001723
Ordinate_Resolution: 0.001723
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: lyr_line
Entity_Type_Definition: Database:Owner:Layer
Entity_Type_Definition_Source: SDMS Database
Attribute:
Attribute_Label: landalb_id
Attribute_Definition:
System generated number - used to join attributes to Informix Line Table
Attribute_Definition_Source: SDMS Database
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 2147483648

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: John Montgomery
Contact_Organization: Alaska State Office, Bureau of Land Management
Contact_Position: State Records Administrator
Contact_Address:
Address_Type: mailing address
Address: 222 W. 7th Ave #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99513
Country: USA
Contact_Voice_Telephone: (907) 271-5054
Contact_Facsimile_Telephone: (907) 271-4549
Contact_Electronic_Mail_Address: John_Montgomery@ak.blm.gov
Hours_of_Service: 0800 -1630
Distribution_Liability:
No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data.

Metadata_Reference_Information:
Metadata_Date: 20020227
Metadata_Review_Date: 2003
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Varner
Contact_Organization: Branch of Spatial Records
Contact_Position: Spatial Database Administrator
Contact_Address:
Address_Type: mailing and physical address
Address: 222 W 7th Ave #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99513
Country: USA
Contact_Voice_Telephone: (907) 271-5799
Contact_Facsimile_Telephone: (907) 271-4549
Contact_Electronic_Mail_Address: Tim_Varner@ak.blm.gov
Hours_of_Service: 0800 - 1630
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile

Generated by mp version 2.9.12 on Thu Mar 09 14:08:09 2017