CDSS Townships, Division 1

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Bureau of Land Management
Originator: U.S. Forest Service
Publication_Date: 20020429
Title: div1_townships
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publication_Place: Denver, Colorado
Publisher: Bureau of Land Management
Online_Linkage: www.geocommunicator.gov/lsi
Description:
Abstract:
This layer is based on Geographic Coordinate Data Base (GCDB) coordinate data. The locations of Public Land Survey System (PLSS) corners, as represented in geographic coordinate pairs, were derived from a variety of source documents, which include U.S. General Land Office and BLM survey plats/notes, as well as survey data obtained from other U.S. Government agencies, private sector survey firms, and local governments. The attributes assigned to PLSS polygons were taken from the BLM's Legal Land Description (LLD) data set, contained within the Legacy Rehost for the year 2000 (LR2000) automated records system. The coordinate data was produced by using control stations of known location, with varying degrees of accuracy, from various sources which include but are not limited to; U.S. Geological Survey (USGS) topological quadrangles and other sources, National Geodetic Survey (NGS) and US Coast & Geodetic Survey (USC&GS) Cooperative Base Network (CBN) control, Federal Base Network control (FBN), and Continuous Operating Reference Stations (CORS), and Global Positioning System (GPS) data, which is then analyzed and adjusted in concert with official survey data for any given geographic area. The Land Survey Information Data Base (LSI) data is a useful representation of the geometry and topology of parcels contained within the PLSS, but its application is intended for mapping purposes only. The GCDB data served from LSI is not a substitute for a legal land survey.

Original GCDB data was clipped with CO Water Division 1.

Purpose:
The GCDB Data was created to provide the BLM and its public with a set of geographic foundation data that accurately portrays the locations of PLSS corners. The GCDB data is based on the best and most current survey records available and uses known geographic positions of control stations within the PLSS network. This data is a key component of the Land Survey Information (LSI) framework upon which parcel boundary information will be assembled.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
 
Range_of_Dates/Times:
Beginning_Date: 18490303
Ending_Date: present
Currentness_Reference: ground condition
Status:
Progress: In work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -106.228174
East_Bounding_Coordinate: -101.942823
North_Bounding_Coordinate: 41.039712
South_Bounding_Coordinate: 38.659367
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: General Land Office
Theme_Keyword: GLO
Theme_Keyword: Bureau of Land Management
Theme_Keyword: BLM
Theme_Keyword: Public Land Survey System
Theme_Keyword: PLSS
Theme_Keyword: Geographic Coordinate Data Base
Theme_Keyword: GCDB
Theme_Keyword: National Spatial Data Infrastructure
Theme_Keyword: NSDI
Theme_Keyword: Land Information System
Theme_Keyword: LIS
Theme_Keyword: Land Survey Information
Theme_Keyword: LSI
Theme_Keyword: Cadastral
Theme_Keyword: Township
Theme_Keyword: Range
Theme:
Theme_Keyword_Thesaurus: BLM-State
Theme_Keyword: Arizona
Theme_Keyword: Arkansas
Theme_Keyword: California
Theme_Keyword: Colorado
Theme_Keyword: Idaho
Theme_Keyword: Michigan
Theme_Keyword: Montana
Theme_Keyword: Nebraska
Theme_Keyword: Nevada
Theme_Keyword: New Mexico
Theme_Keyword: North Dakota
Theme_Keyword: Oregon
Theme_Keyword: Utah
Theme_Keyword: Washington
Theme_Keyword: Wyoming
Theme:
Theme_Keyword_Thesaurus: BLM-Theme
Theme_Keyword: Cadastral
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Colorado
Place_Keyword: Division 1
Access_Constraints: None
Use_Constraints:
The geographic coordinates and their associated products are NOT legal land survey records. The coordinates can NOT be used as a substitute for a legal land survey. They can be used for record keeping, mapping, graphics and planning purposes only. No warranty is made by the Bureau of Land Management for use of the data for purposes not intended by BLM.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Regina LeFort
Contact_Organization: Bureau of Land Management
Contact_Position: L&RPO GCDB Lead
Contact_Address:
Address_Type: mailing address
Address: P.O. Box 25047
Address: Mail Stop: WO - 330D (DFC)
Address: Building 40, Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0047
Country: USA
Contact_Voice_Telephone: (303) 236-0951
Contact_Facsimile_Telephone: (303) 236-6691
Contact_Electronic_Mail_Address: regina_lefort@blm.gov
Contact_Instructions:
For information about the data content, please contact the BLM State Office, GCDB Manager or GCDB Contact at: <http://www.blm.gov/gcdb/gcdbsites/index.html> For information directly relating to metadata, please contact Regina LeFort at regina.lefort@blm.gov
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.3.0.800

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
100% of the data was checked for attribute accuracy by the GCDB personnel in each of the respective BLM State Offices.
Logical_Consistency_Report:
The data set is topologically structured with nodes at all intersections. Labels representing the legal land description are assigned to each land unit.
Completeness_Report:
All GCDB spatial outputs are visually inspected for completeness to ensure that all survey data for a given geographic area is included in the data set.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Accuracy of the individual points contained within the GCDB layers of LSI that were determined using GMM software were adjusted using both compass rule and a least squares analysis, which examines the geometry of PLSS parcels in relation to the coordinate values of known locations for control points within the PLSS grid. Each individual point carries a reliability factor indicating the error ellipse in both northing and easting which is reported after the least squares analysis is completed.

Accuracy of the individual points contained within the GCDB layers of LSI that were determined using PCCS software were adjusted using a succession of compass rule adjustments between the control points followed by a least squares analysis, which examines the geometry of PLSS parcels in relation to the coordinate values of known locations for control points within the PLSS grid. Each individual point carries positional reliability factors for the average of the misclosures in the data set and the maximum misclosure in the data set.

Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Bureau of Land Management
Publication_Date: 20020430
Title: Land Survey Information (LSI)
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Denver, Colorado
Publisher: Bureau of Land Management
Type_of_Source_Media: online
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 18490303
Ending_Date: present
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: BLM
Source_Contribution:
Survey data in the form of official (microfilm, CD, other) survey and BLM, abstracted into a vector digital format.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Forest Service
Publication_Date: 19980601
Title: Automated Lands Project (ALP)
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: U.S. Forest Service
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19980601
Ending_Date: present
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: USFS
Source_Contribution:
Survey and control data from the Cartographic Feature File (CFF) data set.
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S Geological Survey
Publication_Date: 1931
Title: USGS standard topological quadrangles
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Denver, Colorado
Publisher: U.S. Geological Survey
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1931
Ending_Date: present
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: USGS
Source_Contribution:
Digitized control data from standard topological quadrangle sheets.
Source_Information:
Source_Citation:
Citation_Information:
Originator: National Geodetic Survey
Publication_Date: 20000101
Title: Official Control Station Sheets
Geospatial_Data_Presentation_Form: tabular digital data
Publication_Information:
Publication_Place: Silver Springs, Maryland
Publisher: National Geodetic Survey
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19010101
Ending_Date: present
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: NGS
Source_Contribution:
Survey control data from the official control station sheets (CBN, FBN, CORS).
Process_Step:
Process_Description:
Compile survey input data from the best and most current survey records.
Source_Used_Citation_Abbreviation:
BLM database of the index to all official (microfilm, CD, other) BLM survey records.
Source_Used_Citation_Abbreviation: USFS survey records.
Source_Used_Citation_Abbreviation: Private land surveyor records
Source_Used_Citation_Abbreviation:
GCDB Data Collection Attribute Definitions Version 2.0, Appendix A, 2/14/1991. Survey records used - source abbreviations.
Process_Date: Unknown
Process_Step:
Process_Description: Compile listings of known locations of PLSS corners.
Source_Used_Citation_Abbreviation: USGS topographic quadrangles and other sources.
Source_Used_Citation_Abbreviation: USC&GS published coordinate data.
Source_Used_Citation_Abbreviation: NGS published coordinate data.
Source_Used_Citation_Abbreviation: BLM global positioning Data.
Source_Used_Citation_Abbreviation: USFS global positioning data.
Process_Date: Unknown
Process_Step:
Process_Description:
Coordinates of control stations are entered into a control data base with associated reliabilities.
Process_Date: Unknown
Process_Step:
Process_Description:
With GMM survey data, abstracted from survey plats, and control stations extracted from the control database, are manually entered with weighting factors into GMM software. Compass rule and least squares adjustments are performed using weighting factors assigned to both control stations and survey line data, based on methodologies and vintage of survey.
Process_Date: Unknown
Process_Step:
Process_Description:
With GMM, section subdivision is performed to achieve land unit detail to at least the forty acre parcel level. Instructions for calculating non-regular and minor subdivisions are persistently stored during collection and rerun after every new adjustment in order to achieve the detail necessary to delineate all lines required for depicting federal rights, interests, restrictions, and encumbrances. Coincident lines and lines identified as non-boundary lines are removed from the data set used for final land unit constructions. Line intersections are computed and given unique identifiers and land units are constructed.
Process_Date: Unknown
Process_Step:
Process_Description:
GMM lists all coordinates produced by the compass rule and least squares adjustments and subdivision, with connectivity codes between points and compiles them into a single file for development of Geographic Information Systems (GIS) output.
Process_Date: Unknown
Process_Step:
Process_Description:
With PCCS, survey data abstracted from survey plats and control stations extracted from control data base are manually entered into the PCCS processing software. A succession of compass rule adjustments is performed on the lines to adjust them to the control points, followed by a least squares analysis. The resulting coordinates are accompanied by indications of positional reliability; the average of misclosures in the data set and the maximum misclosure in the data set.
Process_Date: Unknown
Process_Step:
Process_Description:
PCCS lists all coordinates produced by the compass rule and least squares adjustments with connectivity codes between points and compiles them into a single file for development of GIS files.
Process_Date: Unknown
Process_Step:
Process_Description:
With PCCS, section subdivision is performed to achieve land unit detail to at least the forty acre parcel level.
Process_Date: Unknown
Process_Step:
Process_Description:
GCDB data conversion software verifies correctness of GCDB file formats and content.
Process_Date: Unknown
Process_Step:
Process_Description:
Verified coordinate, line and label files are converted to GIS coverages using the topology check application. All errors in topology are flagged for editing and correction.
Process_Date: Unknown
Process_Step:
Process_Description:
If topological errors exist, editing of arc and node data, as well as parcel labels, is performed using either GMM or ArcInfo Interface (AII). (PCCS townships can only be edited using AII). Final edits are entered into input files and the process is repeated until all errors are corrected and a successful GIS coverage is created.
Process_Date: Unknown
Process_Step:
Process_Description:
GIS coverages are edgematched with adjoining township data sets to insure a seamless PLSS grid is created.
Process_Date: Unknown
Process_Step:
Process_Description:
Topologically correct GIS coverages are modified to use FGDC compliant naming conventions and then loaded into the LSI database. These layers can then be downloaded as shapefiles through the LSI website.
Process_Date: Unknown
Process_Step:
Process_Description: Original GCDB data was clipped with Division 1 boundary
Source_Used_Citation_Abbreviation: twnshp.shp
Process_Date: 5/19/03
Source_Produced_Citation_Abbreviation: dist47_plss.shp
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Nils Babel
Contact_Organization: Riverside Technology, inc.
Contact_Position: GIS Technician II
Contact_Voice_Telephone: 970.484.7573
Contact_Facsimile_Telephone: 970.484.7593
Contact_Electronic_Mail_Address: ncb@riverside.com

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: 2374

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 13
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -105.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.000512
Ordinate_Resolution: 0.000512
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
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 1.000000
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: div1_townships
Entity_Type_Definition: Public Land Survey System Township First Division (GCDB Secion)
Entity_Type_Definition_Source: ArcSDE
Attribute:
Attribute_Label: FID
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: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: townid
Attribute_Definition: PLSS Township ID
Attribute_Definition_Source: Internally Generated Number
Attribute:
Attribute_Label: plssid
Attribute_Definition: First Division Type
Attribute_Definition_Source: First Division Type
Attribute:
Attribute_Label: lndkey
Attribute_Definition: Section Number
Attribute_Definition_Source: Section Number
Attribute:
Attribute_Label: town
Attribute_Definition: Section Fraction
Attribute_Definition_Source: Section Fraction
Attribute:
Attribute_Label: twndir
Attribute_Definition: Duplicate Section
Attribute_Definition_Source: Duplicate Section
Attribute:
Attribute_Label: twnfrt
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: range
Attribute_Definition: ArcSDE Row ID Field
Attribute_Definition_Source: Internally Generated Number
Attribute:
Attribute_Label: rngdir
Attribute_Definition: ArcSDE Object ID Field
Attribute_Definition_Source: Internally Generated Number
Attribute:
Attribute_Label: rngfrt
Attribute:
Attribute_Label: twndup
Attribute:
Attribute_Label: twnmet
Attribute:
Attribute_Label: primer
Attribute:
Attribute_Label: state
Attribute:
Attribute_Label: objectid
Overview_Description:
Entity_and_Attribute_Overview:
The LSI PLSS Land Survey System Township First Division layer (FIRST) contains first division polygons representing surveyed sections.
Entity_and_Attribute_Detail_Citation:
U.S Department of the Interior, Bureau of Land Management, LSI Database Description Document other supporting documentation. Internet versions are available at: www.blm.gov/gcdb/standards/index.htm

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Regina LeFort
Contact_Organization: Bureau of Land Management
Contact_Position: L&RPO GCDB Lead
Contact_Address:
Address_Type: mailing address
Address: P. O. Box 25047
Address: WO-330D (DFC)
Address: Building 40, Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0047
Country: USA
Contact_Voice_Telephone: (303) 236-0951
Contact_Facsimile_Telephone: (303) 236-6691
Contact_Electronic_Mail_Address: regina_lefort@blm.gov
Contact_Instructions:
For information about the data content, please contact the BLM State Office, GCDB Manager or GCDB Contact at: <http://www.blm.gov/gcdb/gcdbsites/index.html> For information directly relating to metadata, please contact Regina LeFort at regina.lefort@blm.gov
Resource_Description: Downloadable Data
Distribution_Liability:
Although these data have been processed successfully on a computer system at the U.S Bureau of Land Management, no warranty, expressed or implied, is made by the BLM regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARCE
Transfer_Size: 5
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: LSI Download Site
Access_Instructions: <http://www.lsi.blm.gov>
Online_Computer_and_Operating_System:
The server which this data is available from is a NT Quad Zeon, running the NT operating system.
Fees: No fees are required for downloading the data that is on-line.

Metadata_Reference_Information:
Metadata_Date: 20030618
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Regina LeFort
Contact_Organization: Bureau of Land Management
Contact_Organization_Primary:
Contact_Organization:
REQUIRED: The organization responsible for the metadata information.
Contact_Person: REQUIRED: The person responsible for the metadata information.
Contact_Position: L&RPO GCDB Lead
Contact_Address:
Address_Type: mailing address
Address: P.O. Box 25047
Address: WO - 330D (DFC)
Address: Building 40, Denver Federal Center
City: Denver
State_or_Province: Colorado
Postal_Code: 80225-0047
Country: USA
Contact_Voice_Telephone: (303) 236-0951
Contact_Facsimile_Telephone: (303) 236-6691
Contact_Electronic_Mail_Address: regina_lefort@blm.gov
Contact_Instructions:
For information about the data content, please contact the BLM State Office, GCDB Manager or GCDB Contact at: <http://www.blm.gov/gcdb/gcdbsites/index.html> For information directly relating to metadata, please contact Regina LeFort at regina.lefort@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:
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Profile_Name: ESRI Metadata Profile
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Profile_Name: ESRI Metadata Profile

Generated by mp version 2.7.33 on Wed Jun 18 16:45:28 2003