Cadastral PLSS Standardized Data - PLSSIntersected (Shiprock) - Version 1.1
Dataset Identification:
Resource Abstract:
This feature class is part of the Cadastral National Spatial Data Infrastructure (NSDI) CADNSDI publication data set for rectangular
and non-rectangular Public Land Survey System (PLSS) data set. The metadata description in the Cadastral Reference System
Feature Data Set more fully describes the entire data set. The fully intersected data is the atomic level of the PLSS that
is similar to the Esri coverage or the smallest pieces used to build the PLSS. Polygons may overlap in this feature class.
This feature class will also contain retired or replaced areas of the PLSS.
Citation
Title Cadastral PLSS Standardized Data - PLSSIntersected (Shiprock) - Version 1.1
The fully intersected polygons are used for conversion and for maintenance. The contain the atomic and fully attributed components
of the other PLSS features. This is the feature class used to derive other feature classes in this data set. This feature
class also contains retired or replaced features.
Resource language:
eng; USA
Resource progress code:
complete
Resource Maintenance Information
maintenance or update frequency:
asNeeded
Constraints on resource usage:
Legal Constraints
Access Constraints
otherRestrictions
use constraint:
otherRestrictions
Other constraints
Access Constraints: none. Use Constraints: This dataset is for GIS and mapping purposes and is not intended to support or
replace land survey data or the information provided by land survey.
Spatial representation type code:
vector
Processing environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.3000
description BLM Cadastral Survey using the computational programs of either GMM or PCCS has generated the data where BLM Cadastral is
the identified data steward. For both programs the first step is to compile survey input data from the best and most current
survey records. Control points are identified, evaluated and entered into a control database With GMM the survey data, measurements
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 survey methodologies and vintage of survey. With GMM, section subdivision
is performed to achieve land unit detail to at least the forty acre (1/16th ) 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. 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. With PCCS the survey data, measurements
abstracted from survey plats, and control stations extracted from the control database 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. 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 Geographic Information Systems (GIS) output. With PCCS, section subdivision is performed to achieve land
unit detail to at least the forty acre (1/16th) level.
Processing Step
date and time 2011-04-12T00:00:00
description GCDB data conversion software (also called data prep) verifies correctness of GCDB file formats and content based on the polygon
coding and the rules associated with those codes. 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. If topological errors
exist, editing of arc and node data, as well as parcel labels, is performed using either GMM or ArcGIS Interface. Final edits
are entered into input files and the process is repeated until all errors are corrected and a successful GIS coverage is created.
GIS coverages are edge matched with adjoining township data sets to insure a seamless PLSS data set is created. Topologically
correct GIS coverages are modified to use FGDC compliant naming conventions and then loaded into the CADNSDI.
Processing Step
date and time 2011-04-12T00:00:00
description The resulting GCDB data sets are imported into a file geodatabase feature class called LADESC and the points are loaded into
the PLSSCorners feature class. A series of extract-transfer-load (ETL) routines are run to import the data into the PLSS Intersected
feature class. Metadata is loaded and edited.
Processing Step
date and time 2013-04-15T00:00:00
description PPLSS files were clipped into twenty-two sections using NM 1:250000 Quad Grid with 15 Mile Buffer layer.
processing agent contact
-
processor
organisation Name
Earth Data Analysis Center
position Name Clearinghouse Manager
Contact information
Telephone
Voice 505-277-3622 ext. 230
Fax 505-277-3614
Address
MCS01 1101 University of New Mexico, Albuquerque, NM, 87131
Country USA
measure Description
The spatial features in this feature class were derived from the PLSSIntersected feature class. The topology rules for this
feature class are re-checked after the dissolve process. The polygon edges in this feature class overlay the polygon lines
in the PLSSIntersected feature class.