Pima County Geographic Information Systems

General Land Office Survey Maps

Overview

The original Arizona cadastral survey "plats" were done by what was then called the General Land Office (GLO) in the late 1800's and early 1900's. The results we see here are scanned images of the maps as provided by the Bureau of Land Management and cover the entire state. These historical surveys established the townships and sections that we continue to use to this day as part of the Public Land Survey System. See The Surveying System in Pima County for an explanation of sections, townships and the Public Land Survey System (PLSS).

Generally, each map covers one township. A township is a square grid of 36 sections (or approximately 36 square miles). Picking a township shows one or more map sheets for the township. Besides the original township-wide map, there are usually updates or detail maps for the township.

There are three ways to find GLO Survey Maps:

1. Use the township or section index map on PimaMaps - Main. Click on a township or section on the index map. Then click the "More Information" link in the displayed map tip. Then pick the displayed page's "General Land Office Survey Maps" link to drill down to the same results you get below by picking the township from the drop-down lists.
   • Township Index Map
   • Section Index Map

2. Select a township by entering township and range numbers. The default values below are near downtown Tucson.

   Township    Range     01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41    01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32   North    West   All of Arizona South    East

3. Find a map using the Document Management System search .