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Precinct winners in the 2016 TUSD race

GIS By February 21, 2017 Tags: , , , No Comments

This map shows which candidates received the most votes in each of TUSD’s 112 voting precincts. These precinct “wins” do not factor into the election outcome, because its winners are determined by the overall, district-wide vote. But they do shed light on the geography—and demography—of each candidate’s support within the community.

Some noteworthy features: (1) Cam Juarez dominated the district’s southside, more heavily Latino precincts, but did not do well enough anywhere else to retain his seat. (2) Mark Stegeman was unpopular in the district’s core precincts, but dominated throughout its Republican-leaning outskirts. (3) Betts Putnam-Hidalgo, who lost to Rachel Sedgwick by a tiny margin, owned the district’s white hardcore progressives and a good chunk of the Latino vote as well. Two precincts were tied. These are indicated in white. For a resizable version of this map in a separate tab, click here.

If you zoom in and click on an individual precinct, the map should display detailed vote total information for that precinct.

A closer look at the 2016 TUSD Governing Board race

GIS By February 20, 2017 Tags: , , , No Comments

Last November’s seven-way race for three seats on the Tucson Unified School District’s (TUSD) governing board resulted in the re-election of incumbents Mark Stegeman and Kristel Foster, and the election of newcomer Rachel Sedgwick. This map shows, via brightness gradients, the vote totals for each of the seven candidates in each of TUSD’s 112 voting precincts. To illuminate the candidates’ totals, use the control panel to the right of the map. If you zoom in and click on an individual precinct, the map should display complete vote total information for that precinct. To open a re-sizable map in a separate tab, click here.

Homeowners receiving Arizona’s Historic Property Tax Reclassification in Pima County

GIS By February 20, 2017 Tags: , , , , 4 Comments

For its recipients, Arizona’s Historic Property Tax Reclassification is a pretty great deal. Homeowners who qualify get their assessment ratios slashed from 10% to 5%, cutting their property tax bills in half. This map shows the residential properties in Pima County that receive this benefit. If you zoom in and click on an individual parcel, the map should display that property’s street address and parcel number. For a re-sizable window in a separate tab, click here.

For more on what it takes to qualify for the Historic Property Tax Reclassification, and how to apply, click here.

Homeowners versus renters in Pima County

GIS By February 19, 2017 Tags: , , , 2 Comments

This map attempts to visualize Pima County’s respective distributions of residential property that is owner-occupied, and residential property that is not. The latter category consists almost entirely of rental property, but also includes a few other instances of non-owner-occupied property, such as vacation homes, certain group homes, and bed-and-breakfasts. It is represented in orange; the owner occupied property is represented in blue. To view this map in a separate, re-sizable window, click here.

Only residential property is represented on this map. Included in the white areas are public rights-of-way, government property, commercial property, agricultural property, and a number of other non-residential property types. This map distinguishes owner-occupied properties from other types based on their legal class, according to the Pima County Assessor’s records. For more information about legal classes, click here.

How Gary Johnson and Jill Stein fared in Pima County’s voting precincts

GIS By February 8, 2017 Tags: , , , , No Comments

Libertarian presidential candidate Gary Johnson received 15,620 votes in Pima County, 3.66 percent of the total 427,102 ballots counted. Green Party presidential candidate Jill Stein received 6,200 votes, or 1.45 percent of the total. The color gradient on the maps below represents the range of vote percentages for each candidate. The darkest areas are the precincts where each did best. Johnson’s strongest showing was in Precinct 114 (Davis-Monthan Air Force Base), where he received 42 votes out of 412 cast, or 10.19 percent of the vote. Stein’s strongest was in Precinct 44 (West University and downtown), where she received 50 votes out of 1,433 ballots cast, or 4.4 percent of the vote. As with the previous presidential map, you can zoom in to see areas in greater detail. If you click somewhere on the map, statistics for that precinct (including percentages and vote totals for all presidential candidates) should display above your cursor.

Gary Johnson

Jill Stein

A closer look at the 2016 presidential election in Pima County

GIS By February 5, 2017 Tags: , , , , 3 Comments

This map shows each of Pima County’s 248 voting precincts with a shades of blue and red to indicate the respective degrees to which they favored the Democratic or Republican candidate, Hillary Clinton or Donald Trump. You can zoom in for a closer look, and click on any precinct for more detailed information. For a resizable version in a separate window, click here.

Although they were on the ballot, I chose to ignore vote totals for the Libertarian and Green party candidates for the purpose of this map. I also ignored write-in votes, over-voted, and under-voted ballots. None occurred in percentages that exceeded single digits, with the exception of Gary Johnson, who received 42 out of 412 votes—10.19% of the total—in precinct 114.

A GIS tour of Arizona’s golf courses

GIS By February 3, 2017 Tags: , , No Comments

This map shows Arizona’s 353 golf courses. (For a resizable version in a separate window, click here.) If you click on one of them, the map should display the course’s name, number of holes, whether it is public or private, and in some cases, what type of water source it uses. (The source file only contained this data for a limited number of courses.)

The GIS data shown here is provided by the Central Arizona Project, and was obtained via the AZGEO Clearinghouse, an great resource for GIS professionals and enthusiasts.