9.6.2 — Informal Settlement Analytics — maturity: live

Informal Economy Indicators

Using multispectral and very-high-resolution satellite imagery to proxy informal economic activity — market density, rooftop solar adoption, construction churn and night-light intensity — in settlements outside the formal statistical record.

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National statistics offices cannot count what they cannot see. Informal settlements generate real economic output — street markets, home workshops, micro-enterprises — that never appears in GDP accounts, tax registries or labour surveys. Governments making budget, infrastructure and social-transfer decisions are therefore flying blind over the populations that need services most.

A constellation delivering sub-2m optical imagery on frequent revisit cycles changes that calculus decisively. Market footprint extent, rooftop material upgrades, vehicular traffic density and artificial light-at-night are all observable proxies for economic activity. Fused with low-light night-time imagery and Synthetic Aperture Radar coherence change detection, analysts can construct settlement-level economic pulse indices updated monthly — without a single enumerator on the ground.

The operational outcome is a living economic dashboard that planners, tax authorities and social-protection agencies can act on. Identifying a neighbourhood whose market activity has doubled in twelve months triggers questions about service provision and tax-base formalisation. Spotting a district where night-light intensity is falling during a drought triggers early humanitarian pre-positioning. Sovereign control of the data pipeline means these insights stay inside national institutions, are not filtered through a vendor's commercial priorities, and can be classified or shared at the government's discretion.

What matters

Night-light intensity from VIIRS or a sovereign low-light imager correlates measurably with informal retail and manufacturing activity at neighbourhood scale.
Rooftop material change — from corrugated iron to tile or solar panel — is a proven proxy for household income growth and is detectable at 0.5m resolution.
Market footprint area derived from SAR coherence loss and optical shadow analysis gives a weekly economic-activity index that no ground survey can match in frequency.
Vendor-supplied informal-economy analytics carry embedded assumptions about what counts as economic activity; sovereign processing lets national statisticians define and own the methodology.

Sovereignty score: 8/10 — Informal economy data is a direct input to taxation policy, social-transfer targeting and urban investment decisions — outsourcing its derivation to a foreign commercial vendor hands a structural information advantage over domestic policy to outside actors.

Commercial vendors retain processed data products and methodology IP; a national statistics office that relies on them cannot reproduce, audit or defend its own economic indicators under legislative scrutiny.
Settlement-level economic indices reveal politically sensitive patterns — which neighbourhoods are prospering or declining — that a government must control to prevent selective disclosure or exploitation by foreign intelligence services.
Export-controlled very-high-resolution imagery tasking from US or European vendors can be withheld or delayed during diplomatic tensions, breaking continuity of the statistical series at precisely the moments it is most needed.
Sovereign processing allows the methodology to align with national accounting conventions and informal-economy definitions set by the national statistics office, rather than vendor-defined proxies designed for global rather than local validity.

Reference architecture

Payload: Primary: panchromatic/multispectral pushbroom imager, 0.5m GSD panchromatic, 2m multispectral (RGB + NIR + SWIR), 12km swath; secondary: low-light night imager, 100m GSD, 0.001 nW/cm²/sr sensitivity for night-time economic proxy capture
Bus class: ESPA-class microsat, 120–160kg wet mass, 600W end-of-life solar power, 3-axis stabilised to <0.005° pointing knowledge for sub-metre imaging
Orbit: Sun-synchronous LEO at 480–530km altitude, 10:30 local time descending node for consistent shadow geometry; 12-satellite walker constellation delivering 3–5 day revisit at equatorial latitudes, daily at mid-latitudes; night passes exploited for low-light band
Ground segment: 2-station national network (X-band downlink at 150 Mbps, S-band TT&C); primary station co-located with national mapping agency; secondary at a regional university for redundancy; SatNOGS UHF beacon monitoring as tertiary health check
Software & data
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References

Measuring the Informal Economy from Satellite Imagery — World Bank Development Research — World Bank researchers demonstrate that high-resolution imagery and night-light data can substitute for costly ground surveys in estimating informal sector size, particularly in sub-Saharan Africa and South Asia.
VIIRS Day/Night Band — NOAA National Centers for Environmental Information — NOAA's VIIRS Day/Night Band provides globally consistent radiance composites at 500m resolution used extensively as a proxy for economic activity in data-scarce environments.
UN-Habitat — Monitoring Informal Settlements and the SDG 11 Indicators — UN-Habitat's earth observation programme outlines how satellite-derived indicators support SDG 11 tracking for informal urban areas, including economic access and service coverage metrics.
ESA Φ-lab — Urban Economic Activity from Copernicus Data — ESA's innovation lab documents methodologies using Sentinel-1 SAR coherence and Sentinel-2 multispectral data to derive economic-activity proxies in rapidly urbanising regions.
FAO — Remote Sensing for Agricultural Market Monitoring in Informal Settings — FAO outlines how satellite-based crop and land-use monitoring adjacent to informal settlements can be linked to local food market activity and food-security economic indices.