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Automated Change Detection (BAG & BGT)

Jonathan Wilbrink
Business Developer

LinkedIn

Jonathan Wilbrink
Business Developer

Always up-to-date BAG and BGT data.

Automated BAG & BGT Change Detection helps governments, utilities and asset owners identify changes in the physical environment faster and process them with greater control. From new buildings and infrastructure changes to updated land use and public space objects.

With Earth Intelligence, Terramira makes change visible before data backlogs arise.

The environment changes constantly.

The physical environment changes every day. New buildings appear, objects disappear and infrastructure is modified. Yet manually checking BAG and BGT updates requires significant time and capacity.

This creates challenges such as:

  • Backlogs in registrations
  • Incomplete or outdated data
  • Inefficient field inspections
  • Higher operational costs
  • Less reliable information for policy and operations

For organizations that depend on accurate geo-information, detecting changes faster and more consistently is becoming increasingly important.

BAG & BGT Change Detection 4 signals
! New building + Paved surface × No BGT match ~ Road surface change
1 new building
1 paved surface
1 no BGT match
1 road change
New buildings
24
last 30 days
Surface changes
11
paving & land use
No BGT match
7
pending validation

Automatically detect changes.

Terramira compares current aerial imagery, satellite imagery and geodata with existing BAG and BGT registrations. Using AI-driven detection models, we identify where relevant changes have occurred.

Examples include:

  • New or modified buildings
  • Surface and land-use changes
  • New public space objects
  • Infrastructure changes
  • Differences between reality and registration

Detected changes are delivered through maps, signal layers or integrations with existing GIS workflows.

Insight in four steps.

1

We collect up-to-date Earth observation and aerial imagery for the selected area.

2

AI models identify discrepancies between reality and existing registrations.

3

Detected changes are reviewed and enriched for reliable follow-up.

4

Results are delivered through dashboards, GIS systems or existing operational workflows.

From reactive updates to continuous insight.

Always up-to-date registrations

Detect changes faster and reduce delays in BAG and BGT updates.

Less manual inspection work

Focus only on relevant changes instead of checking entire areas manually.

Higher data quality

Improve consistency and reliability across geo-information workflows.

Faster operational decisions

Work with current, trusted information for planning, maintenance and policy.

Scalable monitoring

Monitor municipalities, regions or nationwide areas with one consistent approach.

Seamless GIS integration

Integrate detected changes directly into existing GIS systems and workflows.

Built for organizations that rely on accurate geo-data.

This solution is used by:

  • Municipalities
  • Provinces
  • Water authorities
  • Utility companies
  • Asset owners
  • Geo-information teams

Frequently Asked Questions

This includes new, modified and removed buildings, extensions, land-use changes, infrastructure updates and changes in public space objects.

The solution supports both BAG and BGT workflows and can be configured for specific operational goals.

This depends on available data sources and the required level of update frequency. Monitoring can be configured periodically or continuously.

Yes. Results can be delivered through maps, GIS layers, dashboards or API integrations.

Automated detection significantly accelerates the process, but human validation remains important for quality assurance and final processing.

Environment changes
in sight.

Make workflows faster, more accurate and more scalable.

Jonathan Wilbrink
Business Developer