Jeff Allen
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jamaps.bsky.social
Jeff Allen
@jamaps.bsky.social
340 followers 160 following 53 posts
maps, graphics, cities, etc.

website: https://jamaps.github.io/
github: https://github.com/jamaps
~9-5 M-F: https://schoolofcities.utoronto.ca/research-type/data-visualization/
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jamaps.bsky.social
Map we made for the School of Cities' Learning From What Works project — a major report profiling 89 amazing community projects and organizations from across Canada

Check out the report here: schoolofcities.utoronto.ca/research-pub...
Map of Canada with a dot layer symbolizing different types of 'local solutions', organizations and initiatives working to solve complex challenges that communities are facing across Canada. Dots are coloured by different categories (e.g. housing, climate change, etc.) and clustered by province/territory.
December 5, 2025 at 1:16 PM
jamaps.bsky.social
Ottawa figure-ground type map digression from this morning

higher-res here: jamaps.github.io/maps/ott-bui...

#ottawa #maps
Minimal map of Ottawa showing building footprints and rivers
December 3, 2025 at 12:42 PM
jamaps.bsky.social
recent map experiment of Toronto's terrain

made via QGIS/Inkscape/GIMP and TIN data from @torontoopendata.cityof.toronto.ca

higher-res here: jamaps.github.io/maps/terrain...

#toronto #maps #terrain #topography
Map of the City of Toronto shaded on two gradients A) from light blue-ish green to light red based on elevation and B) from light to dark showing slope of the land. The map highlights overall elevation patterns in the City, as well as highlights big river valleys and escarpments
December 2, 2025 at 1:49 PM
jamaps.bsky.social
Recently made a few maps of the new Finch West Line 6 + surrounding land-use

More here: schoolofcities.utoronto.ca/maps-of-line...

#toronto #transit #maps
Graphic of six maps stacked on top of each other of Finch West Line 6 and surrounding land-use: Finch West LRT route, building footprints, population density, space for cars, trees and green space, and zoning. Each map is at the same geographic scale and area.
November 29, 2025 at 4:02 PM
jamaps.bsky.social
Line 6 Finch West is opening soon - here's a chart of 25 years of population change along the route

I adapted this from Michael Liu's great work here: schoolofcities.github.io/tod-toronto-...

#transit #dataviz #toronto
Line chart showing population within 800m from Line 6 Finch West LRT stations. There are two lines, one for the population in 1996 and the other population in 2021. The difference between the lines shows where there has been population growth or decline over this 25 year period.
November 27, 2025 at 5:15 PM
jamaps.bsky.social
Charting number of rental units in apartment buildings in Toronto by year of construction

(This is a quick update to a similar chart I made ~2.5 years ago)

#toronto #housing #dataviz #NationalHousingDay
Stacked bar chart showing the number of apartment units in Toronto by year of construction with categories for private, TCHC, and other social housing. The vast majority were built in the 1960s and 1970s, with a minor up-tick in recent years.
November 22, 2025 at 1:03 PM
jamaps.bsky.social
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
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
September 26, 2025 at 2:08 PM
jamaps.bsky.social
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
linear heatmap of parking ticket density in the City of Toronto
September 24, 2025 at 3:32 PM
jamaps.bsky.social
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...
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%.
September 2, 2025 at 8:50 PM
jamaps.bsky.social
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
August 21, 2025 at 5:20 PM
jamaps.bsky.social
I like this new raised pedestrian crossing at Draper and Wellington

#toronto #urbandesign #walkability
a brick-paved raised pedestrian crossing with temporary orange-and-black traffic barrels on either side indicating recent construction
August 20, 2025 at 12:22 AM
jamaps.bsky.social
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
grid of 6 postcards of Toronto, each is an abstract map or data visualization of sorts
August 15, 2025 at 6:58 PM
jamaps.bsky.social
typographic map experiment of southwest Scarborough

(an older project, recent tinkering)

#scarborough #maps #typography
map of southwest Scarborough (Ontario) showing streets, rail, neighbourhoods, and land cover - all depicted entirely via text (of varying fonts and colours)
June 30, 2025 at 5:29 PM
jamaps.bsky.social
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
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.
June 23, 2025 at 1:01 PM
jamaps.bsky.social
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
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.
June 13, 2025 at 12:02 PM
jamaps.bsky.social
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
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
June 4, 2025 at 11:40 AM
jamaps.bsky.social
#silentSunday #photography #taiwan
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.
June 1, 2025 at 5:33 PM
jamaps.bsky.social
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
poster showing 25 maps, each of a different city, with each showing a 1km grid of population density overlaid by major rail transit routes
May 23, 2025 at 5:42 PM
jamaps.bsky.social
% of trips by bicycle in Toronto

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

#maps #dataviz #toronto #biketo
screenshot of a map of neighbourhoods in central Toronto showing % of trips made by bicycle
April 12, 2025 at 1:28 PM
jamaps.bsky.social
postcard version of our Toronto bike share trip density map

#maps #dataviz #toronto #biketo
network heat-map showing patterns of where people tend to ride bike share in Toronto
April 8, 2025 at 12:06 PM
jamaps.bsky.social
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
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.
April 7, 2025 at 10:14 PM
jamaps.bsky.social
#Fensterfreitag
view of a forest and horizon through an almost opaque dark grey blind
March 28, 2025 at 1:01 PM
jamaps.bsky.social
colour remix of a 2021 population density map of the toronto region made a couple years ago

#toronto #maps #dataviz #inkscape #gimp #qgis
population density choropleth map of the greater toronto area overlaid with major rail lines - data from 2021
March 26, 2025 at 3:44 PM
jamaps.bsky.social
#photography #nyc #november2022
photo from 11/2022 of the statue of liberty silhouetted on an orange gradient horizon at dusk
March 24, 2025 at 9:05 PM
jamaps.bsky.social
Recent data doodle - arc diagram of morning peak trip flows on TTC Line 2

#ggplot2 #dataviz #toronto #transit #ttc
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
March 19, 2025 at 1:30 PM