From research and algorithm development to operational solutions

Nexa Geo supports operators, public agencies and researchers with operational Earth observation workflows – from raw satellite data to ready-to-use indicators and digital twins.

▸ Scientific-grade algorithms & multi-mission QA/QC workflows ▸ AI-based reference data generation & validation toolchains ▸ Ground reference data design & Cal/Val support ▸ 3D reconstruction & digital-twin generation from EO data ▸ Advanced object extraction from EO data ▸ EO for natural hazard assessments

Nexa Geo builds on more than two decades of experience in photogrammetry, remote sensing, and geospatial AI.

We design processing chains that are scientifically robust and operationally reliable – ready to plug into your existing GIS, BIM or risk platforms.

Our expertise includes InSAR, DEM/DSM generation, 3D modelling from satellite imagery, validation of satellite sensors and participation in ESA projects.

We collaborate with infrastructure owners, regulators and research teams to co-design workflows that fit real-world constraints: data availability, budgets, regulations and existing tools. Our goal is decisions that are better informed, earlier and more transparent.

We contribute to ESA Earth Observation Calibration & Validation Ecosystem

Projects we have contributed to

Nexa Geo Image

Earthnet Data Assessment Project (EDAP+)

EDAP+ assesses the quality, suitability and interoperability of candidate missions for possible inclusion as ESA Earthnet Third Party Missions. It supports the Earthnet framework by engaging with institutional and commercial mission providers, reflecting the growing role of New Space. Through early data assessment and multi-mission studies, EDAP+ helps ensure coherent, interoperable, mission-grade EO data across current and future systems.


ESA Cal/Val Park Project

With New Space rapidly expanding high-resolution EO data availability, harmonised calibration and validation (Cal/Val) are more critical than ever. ESA is advancing best practices while supporting innovation and access to non-ESA mission data via Earthnet and TPM.

The CEOS CalVal Portal & GCPIX

The CEOS Cal/Val Portal provides globally harmonised protocols, reference datasets and tools for interoperable EO data. The CEOS TMSG GCP Intercomparison eXercise (GCPIX) activity advances this effort by defining, assessing, documenting and harmonising GCPs to improve consistency and fitness for purpose.

Team

Core expertise in Earth observation, calibration & validation, and geospatial AI.

Sultan Kocaman, PhD

Sultan Kocaman, PhD

Leads EO Cal/Val and mission quality assessment for institutional and commercial satellite missions.

📧 sultankocaman@nexageo.de   |   LinkedIn →
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Gizem Karakas, PhD

Gizem Karakas, PhD

Specialised in remote sensing, GIS and information extraction from multi-sensor EO data.

📧 gizemkarakas@nexageo.de   |   LinkedIn →
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Gokcen Gokceoglu, MSc

Gokcen Gokceoglu, MSc

Focuses on geospatial AI, advanced object extraction and operational EO workflows for end users.

📧 gokcengokceoglu@nexageo.de   |   LinkedIn →
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