Ramani Huria — Community-Mapped Flood-Resilience Data for Dar es Salaam
Tanzania
Dar es Salaam's Ramani Huria trained 450 community members and students to map flood-prone informal settlements with OpenStreetMap and drones. …
Peru · Lima · See the Peru profile · See the Lima profile
Evidence: Observational / pre–post Top 9% 86/100 · Ask Evidence Copilot about this practice
Since 2010, Lima Cómo Vamos has surveyed ~2,000 residents of Metropolitan Lima annually on urban quality of life. A 2022 peer-reviewed study of its 2010–2019 data found satisfaction fell across most dimensions, with steeper declines for lower-income residents.
Lima Cómo Vamos is a citizen data observatory founded in 2010 by Asociación UNACEM, Grupo RPP and the Pontificia Universidad Católica del Perú (PUCP), with annual fieldwork run by PUCP's Institute of Public Opinion. It surveys a representative sample of roughly 2,000 residents of Metropolitan Lima and Callao each year.
The observatory tracks residents' satisfaction with dimensions of urban life -- pollution, transport, sanitation, public space, safety and citizen culture among them -- publishing the results as an open Urban Perception Report.
Now in its 15th edition, the report is supplemented by thematic studies such as a January 2026 diagnosis of mototaxi mobility. Lima Cómo Vamos is one of dozens of independently-run 'Cómo Vamos' citizen observatories operating across Latin American cities under a shared methodology, and is a member of the UN-Habitat-linked World Urban Campaign, with funders and partners spanning private companies (UNACEM, RPP, Uber, Lima Expresa) and academia (PUCP).
A peer-reviewed 2022 study, part of a Wellcome Trust-supported research project, analysed the 2010-2019 series and found satisfaction had declined across nearly all measured dimensions -- air-quality satisfaction fell 6.5 percentage points and green-space satisfaction roughly halved -- with residents in lower socioeconomic brackets (D/E) showing steeper declines and consistently worse ratings than higher-income residents (A/B). The most recent (15th) edition reported that 87% of respondents were dissatisfied with citizen security, against 4.1% satisfied.
The 2010-2019 analysis found the gap between socioeconomic groups widened over the decade, indicating that citywide quality-of-life gains, where they occurred, were not shared evenly.
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Tanzania
Dar es Salaam's Ramani Huria trained 450 community members and students to map flood-prone informal settlements with OpenStreetMap and drones. …
Tanzania
World Bank–funded community mappers and university students used smartphone survey tools to map flood-prone drains and buildings across Dar es …
United States of America
In July 2017, 15 volunteer teams in Richmond, Virginia logged 60,000+ car-mounted temperature readings, finding 15–20°F intra-city gaps that helped …
Ecuador
Quito's planning authority and an Austrian/Ecuadorian/CIAT research team used the GeoCitizen participatory-GIS platform to run a 2013 land-zoning process on …
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