Jeff Allen

Really enjoy working on @uoftcities.bsky.social projects like this.

Heavy lifting by @jamaps.bsky.social with data analysis & visualization. Also Mia Wang who’s led data collection and GIS data processing.

Who are streets for?

h/t @daniel-romm.bsky.social @ohtheurbanity.bsky.social #IdeasAtWork

screenshot of map of rail trail route in Albuquerque

screenshot of a bar chart of visits to downtown Albuquerque

screenshot of maps of high-collision intersections in central Albuquerque

screenshot of maps of socio-economic metrics by neighbourhood in central Albuquerque

Graphics from our recent case study "From Tracks to Trail: Planning for equitable (re)development" (Albuquerque, New Mexico)

Read it here: schoolofcities.github.io/eddit/albuqu...

#maps #dataviz

linear heatmap of parking ticket density in the City of Toronto

mapped a decade of parking tickets in Toronto

made this a while ago, might update it in the new year if there's interest

schoolofcities.github.io/parking-tick...

#parking #toronto #maps #dataviz #opendata

Who are streets for? 81% of street space in Toronto is inequitably dedicated to motor vehicles. How can this be fairly re-designed?

check out our recent project mapping street space allocation in Toronto

we find that more than 80% of transportation infrastructure in Toronto is designed for cars, far more than how people actually travel

w/ @lanrickbennett.bsky.social & Mia Wang

schoolofcities.github.io/who-are-stre...

Choropleth map of the greater Toronto and Hamilton area showing what % of children (aged 6-17) are driven to school. The map legend includes a bar chart ranking municipalities in the region. Toronto is the lowest at 31% and Aurora the highest at 51%.

quickly mapped out estimates of what % of children are driven to school in the greater toronto/hamilton area

check out more related maps from this data here: schoolofcities.github.io/transportati...

recent maps/scrollytelling piece on under-valued surface parking lots in Toronto (via an analysis of property tax data)

view the project here: schoolofcities.github.io/underutilize...

#toronto #maps #dataviz #parking

a brick-paved raised pedestrian crossing with temporary orange-and-black traffic barrels on either side indicating recent construction

I like this new raised pedestrian crossing at Draper and Wellington

#toronto #urbandesign #walkability

grid of 6 postcards of Toronto, each is an abstract map or data visualization of sorts

recently updated and printed more @uoftcities.bsky.social Toronto-map-viz postcards

planning to give out a bunch at Civic Spark tomorrow

#maps #dataviz #toronto

map of southwest Scarborough (Ontario) showing streets, rail, neighbourhoods, and land cover - all depicted entirely via text (of varying fonts and colours)

typographic map experiment of southwest Scarborough

(an older project, recent tinkering)

#scarborough #maps #typography

Map of the City of Toronto shaded from light yellow to darker red via an index of heat vulnerability, a combined index that highlights which neighbourhoods are most vulnerable to extreme temperatures. The map is overlaid with the location of outdoor swimming and wading pools.

helped create a few maps of heat vulnerability in Toronto around this time last year

thought today's a good time to re-share

check out more here! - schoolofcities.github.io/heat-vulnera...

#toronto #heat #maps

A visualization of Toronto showing % of daily trips by walk, car, bicycle, and public transit. There is one large map at the top with all four modes 'weaved' together to visualize patterns. Underneath this map are four smaller maps, one for each mode.

recent experiment mapping daily travel mode share in Toronto via weaving space

more info about this little project here: schoolofcities.github.io/transportati...

#toronto #maps #gis #dataviz

screenshot of an interactive web-map for viewing and comparing historical aerial imagery in Toronto - this screenshot specifically compares downtown Toronto in 1947 to 2024

interested in Toronto history? - recently updated our site for viewing and comparing historical aerial imagery / air photos

now includes 1939, 1947, 1954, 1965, 1978, 1985, 2005, 2009, 2012, 2018, 2022, and 2024

schoolofcities.github.io/historical-a...

#toronto #torontohistory #aerial #gis

Photo of skyline of Taipei from 02/2025. Layers of buildings with a bit of green in the horizon.

Photo of northern coast of Taiwan in 02/2025. Cities and green hills and open water.

#silentSunday #photography #taiwan

poster showing 25 maps, each of a different city, with each showing a 1km grid of population density overlaid by major rail transit routes

fun map poster of rail transit and population density by Aniket Kali and myself - just showed this at the Canadian Cartographic Association 2025 conference this week!

check out more maps here:) schoolofcities.github.io/rail-transit...

#maps #transit #gis #geopandas #inkscape #openstreetmap

screenshot of a map of neighbourhoods in central Toronto showing % of trips made by bicycle

% of trips by bicycle in Toronto

more maps here! schoolofcities.github.io/ggh-transpor...

#maps #dataviz #toronto #biketo

network heat-map showing patterns of where people tend to ride bike share in Toronto

postcard version of our Toronto bike share trip density map

#maps #dataviz #toronto #biketo

Map of Yellowknife coloured by property tax revenue per km2. The map highlights how the central, denser, downtown area has higher revenue / is more productive on a per area basis.

quick map I made about a year ago of Yellowknife showing property tax revenue density

keep on going back to this one as a way to show benefits of denser/central neighbourhoods

wish we had more openly available property tax data like this across Canada

#maps #gis #qgis #yellowknife #urbanism

view of a forest and horizon through an almost opaque dark grey blind

#Fensterfreitag

population density choropleth map of the greater toronto area overlaid with major rail lines - data from 2021

colour remix of a 2021 population density map of the toronto region made a couple years ago

#toronto #maps #dataviz #inkscape #gimp #qgis

photo from 11/2022 of the statue of liberty silhouetted on an orange gradient horizon at dusk

#photography #nyc #november2022

Arc diagram of trip flows between stations on Toronto's Line 2 Bloor-Danforth Subway between 6am and 10am for an average weekday in late 2022/early 2023

Recent data doodle - arc diagram of morning peak trip flows on TTC Line 2

#ggplot2 #dataviz #toronto #transit #ttc

two maps each showing clusters of points (bee-swarms) around three locations in toronto to compare relative amounts - the maps are at different zoom-levels/scales - but the clusters of points (bee-swarms) adjust their location to not overlap and remain distinguishable

playing with dynamically generating bee-swarm plots in maplibre and d3 based on zoom-level

#maplibre #d3 #maps #dataviz #gis

Aerial imagery showing the CN Tower casting a shadow on surrounding land in 1985. At the time, much of the nearby area were parking lots, warehouses, and rail yards.

CN Tower casting a morning shadow 1985

Check out more aerial imagery of #toronto on our comparative viewer - schoolofcities.github.io/historical-a...

Map of the area around northwestern Georgian Bay including Little Current, Espanola, Killarney, and Point Grondine

Part of a map I'm creating encompassing the northwestern part Georgian Bay and nearby area (work in progress)

schematic map of the songshan–xindian line in taipei including unique stamps for each station

top portion of a schematic map of the songshan–xindian line in taipei including unique stamps for each station

photo of a stamp at jingmei station in taipei

each metro station in taipei has a unique stamp - was super fun to try to collect as many as i could during my visit a few weeks ago

recently made this metro stamp map for the songshan–xindian line commemorating my trip

jamaps.github.io/maps/songsha...

#taipei #taiwan #transit #maps #inkscape

tree-map bar chart of the total value ($) of infrastructure assets across canada broken down by type of infrastructure (e.g. roads, transit, water) and condition (e.g. poor, fair, good, etc.)

recently charted replacement values of infrastructure across canada

made from statscan data for this report: schoolofcities.utoronto.ca/wp-content/u...

#canada #infrastructure #dataviz @uoftcities.bsky.social

map of terrain around dehradun in abstracted colours, dark-ish green-ish for mountains, red-ish for hills, and yellow-ish for flatland

playing with some terrain iterations around dehradun today

#qgis #gimp #map #dehradun

map of taiwan showing PM2.5 air pollution, ranging from blue/low to red/high - the areas of changhua and yunlin have the worst levels of air pollution on the island on average

quick air pollution map of taiwan

#qgis #gis #taiwan

choropleth map of taipei city highlighting areas of high population density - map also shows rapid transit routes, topography, streets, and water

quick population density map of taipei city

#qgis #gis #taipei

dot map of overture maps 'places' dataset in Taipei, highlighting areas with high and low density

overture places data in taipei alongside some topographic data

#qgis #gimp #gis