G-P16 · TOPIC · humanitarian-and-displacemenGCRI dossier · service level R0
GCRISociety and Human DevelopmentIn development
Topic dossier · Society and Human Development

Humanitarian and displacement

Conflict, persecution, disasters and other crises force people from their homes, within their own countries and across borders. Displacement is increasingly protracted, lasting years or decades. This page sets out how displacement happens and persists, how displaced populations and their needs are counted, and what evidence serves the governments, humanitarian agencies and host communities responding to it.

01In brief

The short answer.

Forced displacement is the movement of people compelled to leave their homes by conflict, persecution, violence or disasters. Most remain within their own countries, displacement is increasingly protracted, host communities in low- and middle-income countries carry much of the burden, and disasters displace people repeatedly.

02Geography

Hazards now in Latin America and the Caribbean.

For humanitarian and displacement, in GCRI's spatial-intelligence reading, the map opens on population density, true-colour imagery and land cover, framed on Latin America and the Caribbean; every other NASA layer, live feed and forecast waits in the layer list.

The interactive map needs JavaScript; the layer list and sources are below.

Layers 3

Hazards now, for this page

Latest available

NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth

Loading the latest NASA imagery.

Drag to move. Ctrl or ⌘ and scroll, pinch or the buttons to zoom; hover for the values under the pointer; reset returns to the region.

For humanitarian and displacement, in GCRI's spatial-intelligence reading, the map opens on population density, true-colour imagery and land cover, framed on Latin America and the Caribbean; every other NASA layer, live feed and forecast waits in the layer list.Satellite and model products as NASA publishes them, each with its own date; indicators, not assessments of any place; claim ceiling INTEGRATED.

Data: NASA GIBS · ASTER GDEM · Blue Marble · © OpenStreetMap contributors · Natural Earth · NASA EONET · GDACS · Copernicus Sentinel-2 L2ASources and licences

  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). Licensed under CC BY 4.0. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). CC BY 4.0
  • VIIRS near-real-time products (flood, land surface temperature, snow cover, corrected reflectance), NASA LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • MODIS land products (vegetation indices, gross primary production, land cover), NASA LP DAAC and LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • VIIRS Black Marble night-time lights, NASA Goddard Space Flight Center; distributed by the NASA Level-1 and Atmosphere Archive and Distribution System (LAADS DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • NASA Fire Information for Resource Management System (FIRMS), VIIRS 375 m active fire product, NASA LANCE; vector tiles via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • ASTER GDEM is a product of METI and NASA (ASTER Global Digital Elevation Model V003, NASA LP DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Public domain
  • © OpenStreetMap contributors (ODbL), via NASA GIBS (coastlines, boundaries, roads and place names). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). ODbL
  • Blue Marble, NASA Earth Observatory; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Context on the globe and flat map: coastlines, boundaries, roads and place names from NASA GIBS reference layers (OpenStreetMap data, ODbL, © OpenStreetMap contributors); Blue Marble imagery as an optional base; 3D terrain and the elevation read-out from the ASTER GDEM elevation colour index (5 m to 200 m classes, exaggerated for legibility). Boundaries are drawn as published and imply no position on any territory.
  • Globe: MapLibre GL JS 6.9.1, BSD-3-Clause, © MapLibre contributors.
  • Live: NASA EONET Events are indicative, not official warnings.
  • Live: GDACS (EC JRC / UN OCHA) Events are indicative, not official warnings.
  • Observed (EO): Copernicus Sentinel-2 L2A (contains modified Copernicus Sentinel data 2026), Microsoft Planetary Computer
  • Optional layers (35 sources in the layer list: live, forecast, observed and context) print their provider credit on the map and here when switched on; forecasts are model output and derived indices are estimates.

Layers and dates

  • Population density, 2020: Population: CIESIN, Columbia University, Gridded Population of the World v4.11 (2018), NASA SEDAC, CC BY 4.0 · static
  • True colour: VIIRS NOAA-20 corrected reflectance, NASA LANCE · 13 Oct 2026
  • Land cover type (IGBP), yearly: MODIS Terra and Aqua land cover (MCD12Q1), NASA LP DAAC · 2024
  • Night-time lights, daily: VIIRS Black Marble (VNP46A2), NASA LAADS DAAC · 12 Oct 2026
  • Flood water, 3-day composite: VIIRS Global Flood Product, NASA LANCE · 14 Oct 2026
  • Active fires and thermal anomalies, last day: VIIRS NOAA-20 375 m (FIRMS), NASA LANCE FIRMS · 13 Oct 2026

03Console

Humanitarian needs overview, in outline.

The working screen behind this subject: its structure, terms and states. Names are placeholders and values illustrative.

Humanitarian needs overview: the screen's structure, terms and states for Humanitarian and displacement.Placeholder names and illustrative values; a design, not a record or a live system.
04The question

Humanitarian and displacement: how the risk develops.

Crisis, displacement and safeguarding. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

Mechanism

Most displacement is internal

Most people displaced by conflict and disaster remain within their own country, where they may receive less international protection than refugees.

Mechanism

Displacement becomes protracted

When conflict persists or homes are destroyed, displacement lasts for years. Temporary responses then need to become long-term solutions.

Mechanism

Hosts carry much of the burden

Most refugees live in low- and middle-income countries near their homeland, where host communities share services and jobs.

Mechanism

Disasters displace repeatedly

Floods and storms displace large numbers each year, often temporarily, and some people are displaced again and again.

05Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
RefugeeA person outside their country who cannot return because of a well-founded fear of persecution, conflict or serious public disorder.
Internally displaced personA person forced to flee their home who remains within their own country's borders.
Durable solutionVoluntary return, local integration or resettlement that ends displacement sustainably.
06Indicators

What is measured, and how well.

Each indicator carries its unit, its cadence, the kind of source behind it and the evidence label a value would carry. No values are shown: a programme supplies them under its own authority.

IndicatorUnitCadenceSource typeLabel
Refugees and asylum-seekerscount by country of origin and asylumbiannualUNHCR statisticsOFFICIAL
Internally displaced persons by conflict and violencecountannualIDMC estimatesESTIMATED
Internal displacements by disasterscount of movementsannualIDMC estimatesESTIMATED
People in protracted refugee situationscountannualUNHCR statisticsOFFICIAL
Durable solutions achievedcount of returns, local integration and resettlementannualUNHCR and IOM recordsOFFICIAL
Humanitarian funding coveragepercent of appeal requirements fundedannualOCHA Financial Tracking ServiceREPORTED
07Canvas

From sources to decisions.

The topic as a computational graph: named sources feed the methods, an evidence review gates the outputs, and the decisions stay with the authorities that hold them.

Pipeline canvas · Humanitarian and displacement as a run graphDesign, not a record
Humanitarian and displacement: from needs assessment to accountable responseA joint needs assessment estimates people in need and severity; a response plan sets targets by sector; funding and delivery follow; monitoring and feedback from affected people adjust the response. Design of the process, not a record of a run.

Fig. 02Nodes carry their type, two metric rows and a state; connectors show what feeds what; dashed frames name the owners; the timeline is the cadence. Design of the pipeline, not a record of a run.

08Sources

Where the evidence comes from.

Named public datasets and institutional records, each with its licence class. Sources by agreement are used only under their terms and never republished.

SourceWhat it givesLicence class
UNHCR Refugee Data FinderRefugees, asylum-seekers, stateless people and solutionsPublic, UNHCR terms
Internal Displacement Monitoring Centre Global Internal Displacement DatabaseConflict and disaster displacement estimatesPublic, IDMC terms (to check)
IOM Displacement Tracking MatrixDisplaced populations, locations and needsPublic, IOM terms (to check)
OCHA Financial Tracking Service and Global Humanitarian OverviewHumanitarian needs and fundingPublic, UN terms of use
Joint Data Center on Forced Displacement (World Bank and UNHCR)Socioeconomic data on displaced peoplePublic, terms per dataset
09Decisions

Who decides, and what the evidence serves.

Society and Human Development prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Who decidesThe questionEvidence this page serves
Host governmentsHow to include displaced people in services and labour marketsProfiles; host community evidence
Humanitarian and development agenciesHow to allocate support between emergency response and long-term solutionsProtracted displacement and funding evidence
DonorsWhich responses and solutions to fundFunding coverage and outcome evidence

Outputs this topic produces

  • Displacement profiles with sources and definitions stated
  • Analyses of protracted displacement and solutions
  • Host community impact studies
  • Evidence notes for durable solutions planning
10Core questions

The questions experts ask.

  • Why do people leave, when, and where do they go?
  • How long does displacement last, and what enables return, integration or relocation?
  • How do displaced people and host communities share services, land and work?
  • Which needs are unmet, and for whom?
  • How can research on displaced people avoid causing harm?
11Mechanisms

Drivers and dynamics.

Displacement results from the interaction of hazards and threats with vulnerability and opportunity. Conflict and violence remain major drivers, and disasters displace large numbers of people each year, mostly within their own countries and often temporarily, though repeated events can make movement permanent. Slow-onset changes such as drought, land degradation and sea-level rise act through livelihoods and can lead to gradual out-migration.

Most displaced people live in towns and cities rather than camps, often in informal housing alongside host communities. Protracted displacement is common, and lack of legal status, documentation or the right to work prevents people from rebuilding. Planned relocation, where communities move away from hazardous places, raises difficult questions of consent, land, culture and livelihoods.

Host communities matter as much as displaced people. Rapid arrivals can strain water, schools, clinics and housing, and tensions arise when support appears to favour one group. Evidence on shared services and inclusive local planning shows that outcomes improve when both populations are considered together.

12Methods and data

Data on people in crisis.

Tracking

Displacement monitoring

Tracking of movements and needs through surveys and key informants; numbers can be uncertain and contested.

Needs

Needs assessment

Assessment of food, shelter, health and protection needs; access constraints bias coverage.

Longitudinal

Panel and life-history studies

Following people over time to understand durable solutions; costly and hard to sustain.

Limits: data on displaced people are sensitive and can endanger them if misused. Counts often miss people living with families or in informal settlements, and figures for returns are especially uncertain.

13Methods

How it is studied, and what the methods cannot say.

  1. Social and behavioural scienceSurvey design for hard-to-reach groups · Qualitative and participatory researchApplied here
  2. Spatial statistics and geostatisticsSmall-area poverty estimation · Vulnerability and hazard overlayApplied here
  3. Causal inference and impact evaluationEvaluating cash transfers · Effects of disasters on households · Education programme evaluationApplied here
14Questions

Questions and answers.

What is the difference between a refugee and an internally displaced person?
A refugee has crossed an international border and is protected by refugee law; an internally displaced person has fled but remains within their own country.
What is a protracted refugee situation?
A situation in which a large group of refugees from the same country has been in exile for several years without a durable solution, in UNHCR usage.
What are durable solutions?
Voluntary return, local integration or resettlement to a third country, which end displacement in a sustainable way.
Does the platform determine refugee status?
No. Status determination belongs to national authorities and mandated international bodies.
Does the platform deliver assistance?
No. It studies displacement and its consequences. Assistance is delivered by humanitarian and government actors.
How are displaced people protected in research?
Through informed consent, data minimization, secure handling and a rule never to publish information that could identify or locate individuals.
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