Reading cities. Building intelligence.

Urban heat, material stocks, neighbourhood care and the experience of walking. Explore the research, maps and tools behind my practice. Each case explains the question, my contribution, what exists and its limits.

Urban research.

Four substantial studies connecting environmental observations, urban systems and decisions. Published work sits alongside the ongoing heat-model re-audit.

Shaping Cool Cities

Researcher and developerOngoing research

Six-city urban-heat research combining satellite observations, 3D city models and street-level evidence. Model validation is being rebuilt.

Six labelled isometric voxel models of Amsterdam, Athens, Barcelona, Berlin, Madrid and Paris, with grey buildings, green vegetation and blue water.
Amsterdam study-area detail from the six-city research figure: an isometric voxel model with grey buildings, green vegetation and blue water.

Amsterdam study-area detail. Six cities in the case.

Six study areas, voxelised using VoxCity. Figure: Gerardo Ezequiel Martín Carreño. Declared inputs: EUBUCCO, © OpenStreetMap contributors, FABDEM and High Resolution 1 m Global Canopy Height Maps. Derived urban form; temperature predictions and cooling estimates remain unvalidated.

Explore the project

CityLoops: Urban Circularity Assessment

Co-author and map developerCompleted research

A co-authored method and maps estimating material stored in buildings.

Gerardo’s Apeldoorn map, showing 3D buildings coloured by estimated total material stock, with the stock legend in tonnes.

Buildings coloured by estimated total material stock, in tonnes: pale yellow lowest, dark teal highest. Apeldoorn material-stock map, 2022. Map: Gerardo Ezequiel Martín Carreño. Buildings: 3DBAG; material intensities: Sprecher and colleagues. Basemap: CARTO and OpenStreetMap contributors. Screenshot: 11 October 2026.

Explore the project

Social Superblocks

Researcher and spatial data analystCompleted research

A spatial allocation study of connected neighbourhood areas for Barcelona’s home-care service.

The proposed Social Superblocks in Barcelona, with social-superblock boundaries, mobility superblocks and district boundaries distinguished in the original legend.

Proposed social superblocks (green), each a grouping of mobility superblocks (thin red lines), with district boundaries dashed. Legend, in Spanish: Distritos, districts; Supermanzanas sociales, social superblocks; Supermanzanas de movilidad, mobility superblocks. From Gerardo’s UPC master’s thesis, 2020, p. 29; research developed at BCNecologia, Barcelona’s urban ecology agency. Original map and legend retained.

Explore the project

CENTRINNO: Urban Ecosystem Cartography

Co-authorCompleted research

A co-authored cartography method for nine European pilot cities, connecting local skills, materials and community networks.

Explore the project
Original CENTRINNO Amsterdam alpha demonstrator connecting a municipal-waste Sankey diagram with a KUMU map of local resource owners.

How a pilot page could link Amsterdam’s municipal waste flows (Sankey, top) to local organisations that could use them (KUMU map, bottom). Amsterdam alpha demonstrator, CENTRINNO D2.2, 2022, p. 44, Figure 31. Shared research figure by Metabolic and pilot teams; co-authored deliverable. Basemap: MapTiler and OpenStreetMap contributors. The two source screenshots retain their original boundaries.

Walking and cartography.

A commissioned walking workshop and a south-up atlas. A practice of observing places and questioning how they are represented.

Twenty Years on the Lower Lea

Artist and developerDelivered commission

A delivered walking workshop, route map and print companion exploring Lower Lea regeneration, access and equity.

Explore the project
Five-stop walking route through Queen Elizabeth Olympic Park, with numbered stops and a map scale.

Five-stop route map for the Lower Lea walking workshop of 13 May 2026: meeting at Hackney Wick station, five stops, then the workshop at Barge East. Map: Gerardo Ezequiel Martín Carreño.

Upside Down World

Artist and developerOngoing practice

An atlas and poster maker for turning maps south-up and questioning how the world is drawn.

Upside Down World: London flipped south-up in riso spot inks, exposing north-on-top as a choice rather than a fact.

The same London, south at the top. Orientation changes; the place does not. Basemap: Protomaps, © OpenStreetMap contributors.

Explore the project

Professional delivery.

A completed fractional CTO engagement. For my wider record in location intelligence and research, explore Experience.

CommunityAI

2026, ended October · Completed engagement

Technical leadership for a community-intelligence venture that helps teams work with public neighbourhood data.

Read case study

Course work.

Lekkere Stad: mapping Amsterdam

2023 · Completed course project

A map I made as a student at the 2023 MIT Senseable City Lab summer school with AMS Institute, setting air-quality readings beside Amsterdam’s buildings and street observations.

Read case study

In development.

Projects I am still building.

  • Terra CognitaAn atlas of English Wikipedia articles at their real coordinates, searched by meaning.
  • Climate IntelligenceOne map console for a place’s climate hazards, energy systems and environmental exposure.
  • Geospatial CareersA career workspace for geospatial professionals, from CV to tailored applications and learning priorities.
  • DériveA walking app that connects field notes and observations to personal maps and printed zines.
  • chrono.cityA browser research tool for exploring what lies within walking distance, in London.
  • Invisible Borders CompanionA prototype field journal for photographs, sound and observations along a proposed Marrakesh-to-Lagos journey.
  • Where the EA Said NoA map of planning decisions made against Environment Agency flood-risk advice, from Flooded People UK’s list.

Bring a place and a question.

Looking for a contractor, a team member or a research collaborator? Let’s talk about the work.