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Data visualizations

It’s not actionable intelligence if the results cannot be translated in to a useful narrative. Data visualization is an important strategy for conveying technical analysis to non-technical decision makers.

2016_4_21 bivariate map

The above data visualization attempts to map two variables simultaneously – change in urban footprint (from satellite imagery) and change in population. These maps are typically referred to as ‘bivariate choropleth maps”. The legend at the bottom right helps the reader understand the direction of correlation. We see that many exurban areas around Philadelphia exhibited smart growth over the last 30 years. In addition, while the City’s urban core has grown, it appears as though inner-ring suburbs have been relatively stagnant. Click here for a larger image.

indego data viz3

To learn more about this bike share data viz, check out this brief write-up.

ticketprobability viz 11_27_2015

The City of Philadelphia released millions of geocoded parking violations. Dr. Tony Smith and I thought it would be interesting to explore how certain parking violation hotspots wax an wane over time and space. Here is a gallery with larger, hourly maps.

chicago divvvy
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Bike share data has origin and destination, which makes it challenging

marijuana retail

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Marijuana reform is generating all sorts of interesting economic spillovers. Given that the location of dispensaries are restricted by local zoning laws, spillovers will also be generated in land markets as well. The above data viz illustrates where Denver zoning laws permit marijuana dispensaries across the cities.

crime 405

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Geographers are always interested in boundaries. Here is a longer write up about this data viz on Los Angeles’ 405 splitting the neighborhood in two.

crime lat lon

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An alternate take on crime mapping.

cycle philly

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While most bike share data includes just origins and destinations, the CyclePhilly data includes route information as well.

home prices by neighobrhood

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This image attempts to visualize change in home prices by neighborhood over two time periods using just one map.

home price by distance

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This data visualization tells two stories. The first is that home prices in Philadelphia decrease dramatically with distance from the City’s central business district. The second story is that home prices were not as resilient to the 2008 recession as they were downtown.

home prices and schools

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An attempt to combine small multiple charts with a map.

nbrhod boundaries and home prices

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Assuming Washington Avenue is a boundary between two neighborhoods, this visualization attempts to show its waning significance for two time periods using a 3-D view.

neighborhood home price indices

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Another example pairing small multiples with a map. Here we compare neighborhood home price trends to citywide trends.

parking ticket sheds

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Another attempt at boiling down millions of parking violations into a more manageable data viz.

patents

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sfpark

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Using data from the SFPark Experiment. Check out this write up for more info.

street trees sf

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street trrees nyc

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The above two images make use of the growing number of street tree datasets in cities nationwide.

ugb

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Some urban planning work from Lancaster County, Pa.

vacant land detroit

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An example of satellite remote sensing from Detroit.

zipfs

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There are a surprising number of domains that Zipf’s law applies to including cities.

nba

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