Description: The smallest unit in the Public Land Survey System is the section; township/ranges are subdivided into 36 sections; each section is approximately one square mile. trs4 displays the sections quartered NE,NW,SW,SE.
Known Errors/Qualifications: Quarter-Section boundaries were mathematically calculated from the Section boundaries, and should only be used as a general reference.
Lineage: Registered to improved ADOT section corners in 1992.
Produced new layer for the entire County based on the GIS parcel layer Section corners - 05/26/2010.
Spatial Domain: Pima County
Rectified: parcel
Maintenance Format: Shape
Primary Source Organization: Pima County ITD GIS
Primary Source Date: 2010
Primary Source Format: DWG
Secondary Source Organization: Pima County ITD GIS
Secondary Source Contact: Steve Whitney
Secondary Source Date: 20100526
Secondary Source Format: Shape
GIS Contact: Steve Whitney
Definition Expression: N/A
Copyright Text: Pima County Information Technology Department - Geographic Information Systems
201 N Stone Ave., 9th Floor
Tucson, AZ 85701
Color:
[92, 137, 68, 255] Background Color:
N/A Outline Color:
N/A Vertical Alignment: bottom Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 14 Font Family: Times New Roman Font Style: normal Font Weight: bold Font Decoration: none
Description: trs displays the smallest unit in the Public Land Survey System; Township/Ranges are subdivided into 36 Sections; each Section is approximately one square mile. The coverage format includes a tr (Township) region subclass.
This layer has been adjusted to Section corner data from the GIS parcel Section AutoCAD drawings. It also includes the half Township South of 12S14E Sections 31-34, designated as 12F14E (field TR).
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Known Errors/Qualifications: The Canoa Land Grant area is not part of the Public Land Survey System. The trs layer includes sections in the Canoa Land Grant area as if it had been included in the survey.
9/2013: While this layer is maintained as a Shapefile, the coverage format is still required for certain nightly processing. See Steve Whitney.
Lineage: The TRS layer for Pima County was extracted from a state-wide layer of PLSS Section boundaries as received from ALRIS. The ALRIS layer was tablet digitized from USGS 7.5 minute topographic quadrangle paper maps.
In 1992, a database of Section corner locations was acquired from ADOT, and the TRS layer was adjusted to match those ADOT Section corners that were surveyed to an acceptable level.
In 2010, the Section boundaries were adjusted to Section corner locations from the GIS parcel AutoCAD drawings.
Spatial Domain: Pima County
Rectified: parcel
Maintenance Format: Shape
Primary Source Organization: ALRIS
Primary Source Date: 1988
Primary Source Scale: 24000
Primary Source Format: Coverage
Secondary Source Organization: Pima County DOT
Secondary Source Contact: Steve Whitney
Secondary Source Date: 1992
Secondary Source Format: Database
GIS Contact: Steve Whitney
MapGuide Layer Name: Section Grid
MapGuide Scale Range: 0 - 100000
Definition Expression: N/A
Copyright Text: Pima County Information Technology Department - Geographic Information Systems
201 N Stone Ave., 9th Floor
Tucson, AZ 85701
Description: Township & Range is the basis of the Public Land Survey System with 36 square miles per township.
Known Errors/Qualifications: The Canoa Land Grant area is not part of the Public Land Survey System. The tr layer townships cover the Canoa Land Grant area as if it had been included in the survey.
Lineage: 2011-01-18: Township boundaries have been adjusted to match the updated Section boundaries in the layer TRS. The half-Township, T12.5S R14E, has been reintroduced.
Spatial Domain: Pima County
Rectified: parcel
Maintenance Format: Shape
Primary Source Organization: ALRIS
Primary Source Date: 1988
Primary Source Format: Coverage
Secondary Source Organization: USGS
Secondary Source Document: 7.5 minute quad maps
Secondary Source Date: 1988
Secondary Source Scale: 24000
GIS Contact: Steve Whitney
MapGuide Layer Name: Townships
MapGuide Scale Range: 0 - 100000000
Definition Expression: N/A
Copyright Text: Pima County Information Technology Department - Geographic Information Systems
201 N Stone Ave., 9th Floor
Tucson, AZ 85701