Nexus Observatory Sign inCreate account
Nexus Observatory

/

Earth observation & GeoAI

/

Site twins

The site, measured in 3D, to scale.

Site twins, inside Earth observation & GeoAI: city and site models, 3D Tiles and scene layers, BIM and asset information, photogrammetry and reality capture and more. Every item is traced to its specification, from OGC CityGML 3.0 Conceptual Model to OGC 3D Tiles 1.1 (Community Standard), and runs on the open Observatory Protocol.

Plan with usArchitectureThe protocol
Technologies
9
At the frontier
3
Protocol functions
3 of 8
Industries served
16

Real elevation · Bow Valley, Alberta · from the Earth explainers

01What it is

3D, BIM and digital twins.

The reference frames, formats, services, analysis methods, machine learning and 3D models that turn observations into located, queryable and decision-ready geographic information. Every platform, sensor, processing level and ground-segment step that turns remote measurements of the Earth into calibrated, analysis-ready evidence for a site, a region or a network. Each technology below carries what it is, what we do with it, and the standard it is drawn against.

GIS, maps and GeoAI

City and site models

Semantic 3D models of buildings, terrain and infrastructure at defined levels of detail.

We design and integrate.

OGC CityGML 3.0 Conceptual Model

GIS, maps and GeoAI

3D Tiles and scene layers

Streaming of massive meshes, point clouds and models into web and desktop viewers.

We design, integrate and operate.

OGC 3D Tiles 1.1 (Community Standard) · OGC Indexed 3D Scene Layer (I3S) Community Standard

GIS, maps and GeoAI

BIM and asset information

Building and infrastructure models and information management through design, build and operation.

We design and integrate.

ISO 16739-1 (IFC) · ISO 19650-1 (information management using BIM)

GIS, maps and GeoAI

Photogrammetry and reality capture

Meshes, orthomosaics and point clouds reconstructed from drone and ground imagery.

We design, integrate, deploy and operate.

ASPRS Positional Accuracy Standards for Digital Geospatial Data (Edition 2)

GIS, maps and GeoAI

Indoor and underground models

Indoor spaces and subsurface utilities for shelters, plant rooms and tunnels.

We integrate.

OGC IndoorGML · OGC Model for Underground Data Definition and Integration (MUDDI)

GIS, maps and GeoAI

Digital twin frameworks

Linking a model to its physical counterpart with defined fidelity, update rate and purpose.

We design, integrate and operate.

ISO/IEC 30173:2023 · ISO 23247-1 (digital twin framework for manufacturing)

Frontier · GIS, maps and GeoAI

Sensor-fused live twins

Twins updated continuously from sensors, cameras and EO, with provenance on every change.

We design, integrate and operate.

OGC SensorThings API 1.1 · OGC API – Connected Systems

Frontier · GIS, maps and GeoAI

Geospatial augmented reality

Overlaying the twin on the real site for crews through located and oriented devices.

We design and integrate.

OGC GeoPose 1.0

Frontier · Remote sensing and Earth observation

Onboard AI and in-orbit processing

Detecting events and compressing to products in orbit so only what matters is downlinked.

We integrate.

CEOS ARD (as output target)

02Architecture

Where it sits, and what it speaks.

Site twins draws on 2 domains and 16 layers of the spectrum; the highlighted layers carry this area. It speaks 3 of the protocol’s 8 core functions.

Platforms and orbits

8

Optical, spectral and thermal sensors

8

Radar, lidar and microwave sensors

10

Processing levels and analysis-ready data

9

Calibration and validation

8

Tasking, ground segment and access

9

Data cubes, analysis and archives

7

Frontier and research

8

Reference systems and geodesy

7

Vector, raster and array formats

10

Tiling, maps and visual services

7

APIs, catalogues and discrete global grids

8

Spatial analysis and siting

10

GeoAI

10

3D, BIM and digital twins

8

Metadata, quality and publication

5

01JoinIdentity, attestation quote, signed policy.

02AdmitAdmitted for a stated scope, nothing wider.

03DescribeWhat, where, how and by whom, with calibration.

04TimeOne clock across the grid, with its error bound.

05ObserveEvery value with quality and provenance.

06QualifyTested against the specification, state on record.

07FederateSigned exchange across grids and trust domains.

08OrchestrateSoftware and configuration by signed plan.

03On the grid

The ground, measured before it is modelled.

Real elevation, line of sight, an orbit swath and a GeoAI pass, each an interactive explainer on open terrain data with its source shown.

Satellite pass

One orbit, one swath, line by line.

GeoAI

A detection method on real slopes, simulated outputs.

Relief

Terrarium-encoded DEM, contours by marching squares.

Layer stack

Every layer registered to one grid.

04In the field

Where this runs, sector by sector.

6 deployment scenarios from the sector research that rely on site twins.

Development and humanitarian

Displacement-site connectivity and sensing

Point-to-multipoint wireless, satellite backhaul, solar and water-point sensors with protection safeguards.
Environment and climate

Methane fenceline and site-level continuous monitoring

Regulatory cadences in the EU and reporting levels in voluntary frameworks.
Government and public safety

Deployable communications and sensing for incident command

A cell on wheels with satellite backhaul, mesh telemetry and environment nodes at the incident base.
Development and humanitarian

School connectivity with a school observatory

Satellite or fixed wireless, school Wi-Fi, an open connectivity probe and an optional station.
Scientific

Ocean and coastal low-cost buoy arrays

Satellite-backhauled wave buoys accepted in a national programme trial.
Transport

Highway corridor mobile coverage for safety

Small cells and satellite backhaul along unserved roads.

05Open and enterprise

Open by default. Enterprise by contract.

The open counterpart lives on the main site for anyone to read and run. The enterprise service is designed, deployed and operated with you, under contract.

Open, on the main site

  • Observatories atlas
  • World grid
  • Map sources with licences

Enterprise, on this site

  • Capture campaigns
  • Site twins

06The rest of the line

Earth observation & GeoAI, area by area.

Earth observation & GeoAI

Ground segment

Downlink and process at the edge.
Earth observation & GeoAI

Drones and imagery

Campaigns planned to the ground sample distance.
Earth observation & GeoAI

GeoAI

Models trained and checked against field truth.

Bring us the site.

Survey, design, deployment and operation for site twins. The form names who receives your details.

Talk to uscontact@observatory.global

The site, measured in 3D, to scale.

Site twins, inside Earth observation & GeoAI: city and site models, 3D Tiles and scene layers, BIM and asset information, photogrammetry and reality capture and more. Every item is traced to its specification, from OGC CityGML 3.0 Conceptual Model to OGC 3D Tiles 1.1 (Community Standard), and runs on the open Observatory Protocol.

01What it is

02Architecture

Where it sits, and what it speaks.

03On the grid

04In the field

Where this runs, sector by sector.

05Open and enterprise

Open by default. Enterprise by contract.

The open counterpart lives on the main site for anyone to read and run. The enterprise service is designed, deployed and operated with you, under contract.

Open, on the main site
    Enterprise, on this site
      06The rest of the line

      Bring us the site.