GIS & Geospatial
Topological Verification and Correction
GIS-Point worked with a seabed mapping company on the accuracy and reliability of their geospatial data.
- Industry
- GIS & Geospatial
- Location
- Spain
- Team
- A GIS-Point team including quality controllers and project managers carried out the topology validation.
- Stack
- ArcGIS ran the topology checks and corrections.
About the client
Environmental consultancy, specializing in marine and offshore projects.
The challenge, and what closed it
Technical challenge
Seabed maps are a specialised form of marine cartography, and their characteristics drove the work. These are high-precision maps, so every topological correction had to sit inside the mapping standards. The data volumes were large enough that throughput mattered as much as accuracy.
What we did
Topological Integrity Assurance for Seabed Maps.
Why us
Work started with an analysis of the seabed mapping data to find the topological errors. We picked the methods that would resolve them in the least time without giving up accuracy. The standard checks covered objects not overlapping (“Must Not Overlap”), no gaps between polygons (“Must Not Have Gaps”), and polygons not exceeding a set maximum size (for example, “Polygons must have a maximum size of 1 square meter”). These ran in ArcGIS.
Results
The topological integrity of the seabed mapping data improved, and the client’s marine applications now run on more reliable maps. That carries through to the safety of marine operations that depend on them.
What we delivered
Topological Integrity Assurance for Seabed Maps
Tech stack
- Survey & CAD
- ArcGIS ran the topology checks and corrections.
