Datamade 2026 Code Challenge Submission

[achamor1]

Overview

My submission for the DataMade 2026 Code Challenge

• Implemented get_num_permits() for CommunityAreaSerializer() to return the number of permits per community area for a given year.

• Added getPercentageOfPermits() helper function to calculate what percentage of the citywide total each community area has for a given year.

• Implemented getColor() to shade each community area by calculated permit volume (split into quartiles).

• Implemented setAreaInteraction() and added a pop-up functionality to display the permit data statistics per community area.

• Added display for citywide total permits and maximum permits in a single community area for a given year.

• Added accessibility improvements: semantic HTML, aria-live loading state, error state, map legend, and keyboard-accessible popups.

• Includes a test

Demo

Notes

Added a map legend for clarity and to better align with what I've seen on other DataMade projects.

Testing Instructions

Project setup

• From the project root directory run: docker compose build.
• Then load in the data with: docker compose run --rm app python manage.py loaddata map/fixtures/restaurant_permits.json map/fixtures/community_areas.json.
• Run the app: docker compose up.
• visit http://localhost:8080.

Running tests

• From project root directory, run: docker compose -f docker-compose.yml -f tests/docker-compose.yml run --rm app.
• Test creates CommunityArea objects for Beverly and Lincoln Park and RestaurantPermit objects for a given year.
• The test validates that the /map-data/ endpoint returns correct permit counts per
  community area for a given year (In this case, 2 & 3 permits respectively for Beverly and Lincoln Park in 2021).