Alaska Native Allotments - Digitized from MTP or Collected from Special Survey Plats using SDMS (COGO)

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Bureau of Land Management Alaska State Office
Publication_Date: 20180807
Title:
Alaska Native Allotments - Digitized from MTP or Collected from Special Survey Plats using SDMS (COGO)
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage: <http://sdms.ak.blm.gov>
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 native allotment 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 native allotment 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 native land ownership.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20150102
Currentness_Reference: publication date
Status:
Progress: In work
Maintenance_and_Update_Frequency: Daily
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -179.336143
East_Bounding_Coordinate: -117.690402
North_Bounding_Coordinate: 71.227113
South_Bounding_Coordinate: 52.270983
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 the official BLM USS Survey plats. Please refer to the BLM's official survey plats 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 BLM.
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000

Data_Quality_Information:
Logical_Consistency_Report:
The id of the land unit is the only non-system generated attribute in the data set. The attribute correlates directly with the tabular data used to construct the land unit polygon.
Completeness_Report:
The id of the land unit is the only non-system generated attribute in the data set. The attribute correlates directly with the tabular data used to construct the land unit polygon.
Lineage:
Process_Step:
Process_Description:
ArcInfo Processing: The data is exported from the SDMS 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 intersections 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 requires a build rather than clean to create topology.
Coverages are loaded into an ArcSDE Feature Dataset using the cov2sde utility with the append option.
Native allotments are a subset of the SDMS Lands Layer. Only native allotment case types are represented.
Native allotments were digitized from georeferenced Master Title Plats where SDMS collected Native Allotments have not yet been collected OR have not been surveyed. In any case these allotment do not exist in the SDMS data collection and are digitized from the best available source.
Process_Date: 20180807
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jill Cubbedge
Contact_Organization: Bureau of Land Management
Contact_Position: IT Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 222 W. 7th Ave. #13
City: Acnhorage
State_or_Province: AK
Postal_Code: 99513
Country: USA
Contact_Voice_Telephone: (907) 271-3573
Contact_Electronic_Mail_Address: jcubbedg@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: G-polygon
Point_and_Vector_Object_Count: 15773

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: 0.000100
Ordinate_Resolution: 0.000100
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: GIS.COMBO_ALLOTMENTS_NAD83
Entity_Type_Definition:
Native allotment parcels combined into one layer regardless of source (SDMS or Collected from Survey Records)
Entity_Type_Definition_Source: BLM Alaska
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: parcel_no
Attribute_Definition: Case Serial Number
Attribute_Definition_Source: BLM Alaska Land Information System
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name: Case Serial Number
Codeset_Source: BLM Alaska Land Information System
Attribute:
Attribute_Label: source
Attribute_Definition: Source of data - "SURVEY RECORDS" OR "DIGITIZED"
Attribute_Definition_Source: BLM Alaska
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SURVEYED RECORDS
Enumerated_Domain_Value_Definition:
Native Allotment as constructed from Survey Records, i.e. plats and/or field notes.
Enumerated_Domain_Value_Definition_Source: BLM Alaska
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: DIGITIZED
Enumerated_Domain_Value_Definition: Digitized from clipped and georeferenced Master Title Plats
Enumerated_Domain_Value_Definition_Source: BLM Alaska
Attribute:
Attribute_Label: CURRENT_TO
Attribute_Definition: Date data was extracted
Attribute_Definition_Source: Calendar date
Attribute_Domain_Values:
Unrepresentable_Domain: Calendar date
Attribute:
Attribute_Label: shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Tim Varner
Contact_Position: IT Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 222 W. 7th Ave #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99654
Country: USA
Contact_Voice_Telephone: (907) 271-5799
Contact_Electronic_Mail_Address: tvarner@blm.gov
Resource_Description: Downloadable Data
Distribution_Liability:
No warranty is made by the Bureau of Land Management as to the accuracy, reliability, or completeness of these data for individual or aggregate use with other data.

Metadata_Reference_Information:
Metadata_Date: 20130715
Metadata_Review_Date: 20130715
Metadata_Future_Review_Date: 20140715
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Bureau of Land Management
Contact_Person: Tim Varner
Contact_Position: IT Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 222 W 7th #13
City: Anchorage
State_or_Province: AK
Postal_Code: 99613
Country: USA
Contact_Voice_Telephone: (907) 271-5799
Contact_Electronic_Mail_Address: tvarner@blm.gov
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 Tue Aug 07 15:17:51 2018