GIS Library Contents - Metadata PLSS Township Boundary Lines

This metadata information is subject to our disclaimer. Metadata information presented here is maintained manually. Therefore, date-sensitive fields such as date of last update may not be up-to-date. All metadata is subject to errors inherent in a manual process.

Descriptive name		PLSS Township Boundary Lines
File name		trln
Spatial domain		Pima County
Abstract		Township/Ranges are the basis of the Public Land Survey system with 36 square miles per township. This layer represents the boundaries of the Townships in line form. See tr for the polygon form.
Known errors/qualifications		Township Boundary Lines store an estimated Bearing and Distance value for each segment, as well as an accuracy estimate on a scale of 1(high accuracy) to 7(low) in the COGO Accuracy field. All lines start at a 4, due to the lineage (see below). As information from official documents is added, the Accuracy field will be upgraded based on how well the measure matches a document, as well as the age of the document itself to account for differences in available survey technology. These fields are not to be used in place of legal descriptions from official documents.
Feature type		line
Feature count		6,131
Thumbnail Map		trln.pdf    (459,053 bytes, PDF created 04/25/2024 )
Projection		NAD83 HPGN (Parameters)
Rectification		parcel
Field/value metadata		Field metadata
Source organization		ALRIS
Source contact
Source document or file name
Source date		1988
Source scale		1:24,000
Source format		Coverage
Second source name		USGS
Second source contact
Second source document or file name		7.5 minute quad maps
Second source date		1992
Second source scale		1:24,000
Second source format		Unknown
Date of last data update (This date may not be current.)		20110118
Last data update by		Steve Whitney
Date/time last touched - Meaning?		2024-04-25  12:57 AM - Enterprise GDB - Library input format
		2024-04-24  07:07 PM - Shapefile - Back-level date-time by 5.83 hours
		See coverage files, if any, for date.
Lineage		The TR layer for Pima County was extracted from a state-wide layer of PLSS Township boundaries as received from ALRIS. The ALRIS layer was tablet digitized from USGS 7.5 minute topographic quadrangle paper maps. In 2011, Township boundaries were adjusted to match the updated Section boundaries in the layer TRS. The half-Township, T12.5S R14E was reintroduced. In 2021, the township boundaries were converted from AutoCAD .dwg to feature class, converted to lines, and maintained in the Parcel Fabric.
On maintenance?		Yes
Maintenance organization		Pima County ITD
Maintenance frequency		Varies
Maintenance description		Boundaries are updated on a case by case basis, usually to be in congruence with Sections or parcels that border Township lines, and occasionally to reflect the traverse information found on official documents.
Original conversion by		ALRIS
Pima County ITD GIS contact		Steve Whitney
Alternate Pima County ITD GIS contact
On  Pima County Geospatial Data Portal?		No

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