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Arizona

Partisan advantage in Arizona’s legislative districts

Voter Registration Maps By January 21, 2020 Tags: , , No Comments

Here is an interactive map that shows the distribution of political party affiliations in Arizona’s 30 legislative districts. If you hover over a district, the map will display the district number, plus statistics about which voters live in that district. It also shows the current senators and representatives for each district. (Each has one senator and two reps.) You can zoom in on the map for greater detail.

This is a choropleth map, which is to say it uses differences in color to indicate a varying quantity. Democrat-leaning districts are shaded in blue according to their degree of advantage. Republican leaning districts, similarly, are shaded in red.

Republicans hold some degree of advantage in 18 of Arizona’s 30 districts. In these 18 districts, Republicans hold all but one senate seat. Democrat Sean Bowie is the senator for District 18, which leans Republican by 2.7 percent. Democrats hold four house seats in Republican leaning districts: LD 18’s Mitzi Epstein and Jennifer Jermaine,  and LD 16’s Kelli Butler and Aaron Lieberman.

Democrats hold some degree of advantage in 12 of the 30 districts. In these, all senate seats and all house seats are held by Democrats.

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Partisan advantage in Arizona’s counties

Voter Registration Maps By October 26, 2018 Tags: , No Comments

Here is an interactive map that shows the distribution of political party affiliations in Arizona’s 15 counties. If you hover over a county, the map will show that county’s name, the percentage it comprises of the statewide electorate, and statistics about its voters and their party affiliations. You can zoom in on the map for greater detail.

Republicans hold some degree of advantage in eight of the 15 counties. Of these, Yavapai and Mohave counties are the most heavily Republican. Apache and Santa Cruz counties are the most heavily Democratic.

About 75 percent of Arizona’s population lives in its two largest counties: Maricopa County makes up about 60 percent of the state’s population, and Pima County makes up about another 15 percent. Maricopa leans Republican by 5.14 percent. Pima leans Democrat by 8.39 percent.

The pie chart below shows the share each county makes up of the statewide electorate. If you hover over a slice, the chart will show you the county’s name, its number of registered voters, and its share as a percentage.

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Partisan advantage in Arizona’s congressional districts

Voter Registration Maps By October 15, 2018 Tags: , , No Comments

Here is an interactive map that shows the distribution of political party affiliations in Arizona’s nine congressional districts. If you hover over a district, the map will display the district number, plus statistics about which voters live in that district. It also shows the current representative for each district. You can zoom in on the map for greater detail.

Democrats hold some degree of advantage in five of the nine districts. Of these five, two lean heavily in favor of Democrats: Ruben Gallego’s District Seven has a 31.6 percent advantage over Republicans, and Raúl Grijalva’s District Three has a 22.7 percent advantage.

The remaining three Democrat-leaning districts have far slimmer advantages. Tom O’Halleran’s District One leans Democratic by 5.5 percent, and Kyrsten Sinema’s District Nine leans Democratic by 3.3 percent. Martha McSally’s District Two is Arizona’s most competitive congressional district, with Dems holding an advantage of .9 percent.

Arizona has four solidly Republican congressional districts, each with a registration advantage of 15 points or more. David Schweikert’s District Six has a 15 percent advantage over Dems. Debbie Lesko’s District Eight has a 16.9 percent advantage. Andy Biggs’ District Five has a 21.2 percent advantage. And Paul Gosar’s District Four—Arizona’s most heavily GOP congressional district—has an advantage of 26.1 points.

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An interactive map of Arizona’s voting precincts

GIS By September 4, 2018 Tags: , , 2 Comments

Here is an interactive map that shows the geographic boundaries of Arizona’s 1,495 voting precincts. If you hover your mouse over a precinct, the map will also display the legislative district, congressional district, and county in which the precinct is located. The map is zoomable, and will zoom automatically if you click your mouse on a precinct,

Each county is responsible for naming its precincts, and different naming conventions are followed from one to the next. The precincts of Cochise, Coconino, Gila, and Maricopa counties have names as opposed to numbers, and do not have corresponding numbers. The counties of Pima and Yuma have only numbers, not names. The counties of Apache, Graham, La Paz, Mohave, Navajo, and Pinal all have both numbers and names.

My hope is this map might serve as a starting point for more interesting maps to come, such as choropleths that show partisan voter distribution, and vote results from past elections. You can view a choropleth map I made last year showing partisan advantage in Pima County’s voting precincts by clicking here.

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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.

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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.

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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.

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