Lautaro Lacaze Case study · 90.5 FM
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Project 02 · Open data

Tierras Argentinas

An open atlas so anyone can see how much Argentine land is in foreign hands and check every number.

Role
Design and development
Studio
Pantufla
Format
Open data website
Year
2026
Tierras Argentinas cover: the question “Who owns Argentine land?” next to a grid of squares where the blue ones are the foreign-owned share

01 · The starting point

A simple question, with the answer scattered across a thousand places

The debate over foreign ownership of land came back onto the agenda when emergency decree DNU 70/2023 repealed Law 26,737 and its caps on foreign purchases. The data existed, but it was scattered across official registries, the press, academic reports and court records. There was no place to answer the question and, above all, to verify the answer.

02 · The goal

Anyone can explore it, with the source next to every number

  1. Rule 1No figures of our ownOnly official, press or academic data, always linked.
  2. Rule 2No cases with weak evidenceEach file is classified as confirmed or under negotiation.
  3. Rule 3No private personal dataPlaces and ranches are shown approximately.

03 · Design decisions

From the headline figure to each file, without losing the thread

3.1

A question as the cover

It opens with the question and one figure: about 13.3 million hectares, close to 5% of rural land. Next to it, a grid of squares shows the proportion at a glance.

Cover with the question, the hectare figure and the grid of squares
Cover · the proportion at a glance
3.2

The map and the legal yardstick

Each province shows its percentage of foreign-owned land. The ranking bar goes up to 15%, the legal cap, to show how close each one is to the limit.

Map of Argentina by province, with the cases shown with photos and the list of percentages
Province-by-province map · 15% as the scale
3.3

Case by case, like a file

The 23 cases are sorted by area and filtered by status. Each file brings together owner, country, hectares, provinces, conflict and sources, with credit and license on the photos.

An open case file, with hectares, provinces, conflict and a credited photo
Each case’s file
3.4

The law told as a timeline

22 milestones from 1878 to 2026, marked by whether they tighten, loosen or leave the caps unchanged. Each milestone carries its source.

Timeline of the Land Law with a card for each milestone and the years from 1878 to 2026
From the Land Law to DNU 70/2023
3.5

The Senate, seat by seat

A 72-seat hemicycle shows how each bloc voted. The colors only tell the blocs apart, with no partisan weight.

Senate hemicycle with the 72 seats by bloc and an explanation of the vote
Senate composition and votes
3.6

Data to take away and news that updates itself

Cases download as PDF and the dataset as JSON, under CC BY 4.0. News is tracked once a day, and a methodology page explains the scope and limitations.

List of the latest news on land and foreign ownership, with date and outlet
Latest news, every day

How it’s built

A single datasetIt feeds the map, the ranking, the files and the downloads: what you see and what gets shared always match.
Up to date without touching itNews arrives from public RSS feeds once a day, and changes to the law show up across the whole site.
Corrected with evidenceWhen sources differ, the most cited figure is used and all of them are linked. Anyone can point out an error with a better source.

04 · The result

A public atlas that keeps up with the debate

The atlas brings together all 23 provinces and the City of Buenos Aires, 23 documented cases, 63 sources, the history of the Land Law and the composition of the Senate. The data downloads in two formats and can be reused freely. The main goal holds: every number has its source right next to it.

  • Map by province
  • 23 case files
  • Timeline of the law
  • Senate seat by seat
  • PDF + JSON · CC BY 4.0

05 · What I take away

With sensitive data, trust is designed too

  1. The source matters more than the chart: clarity comes from being able to verify, not from seeing more.
  2. A single source of data is what makes it possible to keep a topic that changes every week up to date.
  3. Neutral colors and clear statuses let each person draw their own conclusions.
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