Urban growth and land administration

Informal settlements, unpermitted construction and outdated land registries cost governments revenue and cost residents legal tenure. A pathfinder optical and thermal mission produces the systematic, dateable evidence base that land administration actually requires.

The dependence this ends: Cadastres that describe the city of ten years ago

What the cadastre cannot see from the office

In most fast-growing cities across the Global South, the land registry was last comprehensively surveyed during a period of far slower urbanisation. Settlements have since doubled or trebled in footprint. Whole neighbourhoods exist outside the formal tenure system, which means residents cannot use land as collateral, municipalities cannot levy property tax accurately, and infrastructure planners are working from maps that bear little relation to the ground.

The practical consequence is fiscal. A 2019 UN-Habitat analysis of sub-Saharan African cities found that property tax collection routinely captures less than 30 percent of the theoretical base, partly because the base itself is unmapped. Ending that dependence on outdated cadastres is not a technical aspiration; it is a budget question. Satellite observation provides dateable, repeatable, court-admissible evidence of what was built, when, and whether it matches what was permitted.

What the mission actually observes

The core product is a time-series of sub-metre panchromatic imagery fused with four-band multispectral data, acquired on a regular revisit cycle over defined urban extents. From that stack, change-detection algorithms identify new rooftop footprints, flag structures that appear after a permit cutoff date, and delineate settlement boundaries with enough geometric accuracy to feed a parcel-level registry update.

Thermal infrared adds a second analytical layer. Surface temperature differentials distinguish dense impervious cover from vegetated plots, identify informal industrial activity by heat signature, and produce urban heat-island maps that inform both planning decisions and climate-adaptation budgets. These are not decorative outputs; thermal data has been used operationally in programmes such as the European Space Agency's Urban Thematic Exploitation Platform to prioritise cooling infrastructure investment.

The honest limits are worth stating plainly. Sub-metre panchromatic sensors on small satellites currently achieve ground sampling distances of around 0.5 to 1 metre, sufficient to identify a rooftop but not to read a house number. Cloud cover is a genuine constraint in tropical cities: a single satellite may lose 30 to 50 percent of acquisition opportunities in a monsoon season. Processing pipelines can flag change, but legal adjudication of tenure disputes still requires ground-truth visits. The mission produces evidence; it does not replace the land officer.

Pathfinder: what a first programme looks like

A pathfinder for this mission is typically a single Earth-observation satellite carrying a panchromatic-multispectral imager and a thermal infrared sensor, placed in a sun-synchronous orbit between 500 and 600 kilometres altitude. That orbit gives consistent solar illumination across acquisitions, which matters for change detection: you want the algorithm to flag a new building, not a shadow shift.

Small-satellite missions of this class have publicly reported budgets ranging from the low tens of millions to around fifty million dollars, depending on sensor specification and whether a dedicated ground station is included. The KASS augmentation programme in South Korea and various national Earth-observation initiatives with published procurement notices give a defensible reference range for satellite-plus-ground-segment costs at this scale. A realistic timeline from contract signature to first image on orbit is 24 to 36 months for a pathfinder built around a proven small-satellite bus.

The pathfinder does not deliver a constellation. It delivers a proof of national capability, a domestic operator team, and a processing pipeline that produces city-scale land-administration products. Revisit over a single city is typically every 3 to 7 days at mid-latitudes with a single satellite, depending on off-nadir agility. That is adequate for quarterly change-detection cycles, which is the operational tempo most land registries can actually absorb.

What the customer owns at handover

Ownership is the point of the programme. At handover, the procuring government holds the satellite itself (or its operational control under agreed source-access terms), the ground station hardware and software, the mission-control system with full documentation, and the exploitation software licence covering the change-detection and thermal-analysis pipelines. Critically, the image archive accumulated during the programme is sovereign property: no commercial operator can apply shutter control or retrospectively restrict access to imagery of your own territory.

The trained national team is the most durable asset. Satellize structures handover as a staged process: national engineers shadow mission operations from integration onwards, take primary control before launch plus six months, and hold full operational authority by the end of the first year on orbit. What remains with Satellize or integration partners after handover is limited to warranty support on hardware and optional contracted analytics augmentation. The processing pipeline runs on the customer's own infrastructure.

Processing architecture: from pixel to parcel

Raw imagery is only the beginning. The processing chain for a land-administration product runs from radiometric calibration through orthorectification, pan-sharpening, cloud masking, and change-vector analysis before any human analyst touches the output. The exploitation software layer automates the first three tiers of that chain and presents analysts with a prioritised queue of changed parcels rather than a wall of pixels.

Integration with existing cadastral systems matters as much as the satellite itself. The processing architecture is designed to output in formats compatible with standard GIS environments, including GeoTIFF orthomosaics and vector change layers in formats accepted by land-registry platforms. That design choice is deliberate: the mission must slot into bureaucratic workflows that have existed for decades, not replace them.

What this mission is built from

High-resolution panchromatic optical imagers: Provides sub-metre imagery for rooftop-level change detection and geometric accuracy sufficient to feed parcel-boundary updates.
Multispectral imagers: Adds spectral bands for vegetation mapping, impervious-surface classification and fused pan-sharpened colour products used in settlement delineation.
Thermal infrared imagers: Measures surface temperature to map urban heat islands, identify informal industrial activity by heat signature and inform climate-adaptation planning.
Exploitation and analysis software: Runs the automated change-detection, cloud-masking and parcel-prioritisation pipeline that converts raw imagery into actionable land-administration outputs.

What you end up owning

Operational control of the satellite under source-access terms agreed before contract signature
Ground station hardware and mission-control software with full technical documentation
Sovereign image archive accumulated over the programme lifetime, free of third-party shutter-control rights
Exploitation software licence covering change-detection and thermal-analysis pipelines, running on national infrastructure
Trained national operator team capable of independent mission control and product generation
Hardware audit rights throughout the programme and at handover

Handover follows a staged schedule: national engineers are embedded in mission operations from integration, assume primary control within six months of launch, and hold full operational authority by end of year one. Satellize retains hardware warranty obligations for an agreed period and may provide optional contracted analytics support, but the mission-control system, processing pipeline and image archive operate entirely on the customer's infrastructure under the customer's authority. No ongoing data licence or platform subscription is required to continue operations.

Programme parameters

Satellites (pathfinder)	1 Earth-observation satellite carrying panchromatic, multispectral and thermal infrared sensors
Orbit	Sun-synchronous, 500 to 600 km altitude
Panchromatic ground sampling distance	0.5 to 1 metre, depending on sensor specification
Thermal infrared resolution	Typically 3 to 5 metres for small-satellite class thermal sensors
Single-satellite revisit (urban extent)	3 to 7 days at mid-latitudes with off-nadir agility; longer in high-cloud-fraction tropical environments
Ground station	1 national ground station, sized for daily contact passes
National operator team at handover	Typically 4 to 8 trained satellite operators and data analysts
Timeline to first image on orbit	24 to 36 months from contract signature for a pathfinder on a proven bus
Indicative cost class	Low tens of millions to approximately fifty million dollars for satellite plus ground segment; consistent with published small-satellite Earth-observation programme references
Design life	5 years nominal on orbit

Sources

One contract, one accountable engineer

Commissioned as one programme, not a stack of contracts: spacecraft, launch, ground segment, mission control, training and handover are priced together. Source-access terms and audit rights are agreed in writing before signature. Request a coverage scoping for your city.