Topographic surveys
Plan and elevation surveys, levelling, profiles, setting-out and detailed surveys for design, construction and as-built records.
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Mapping & networks division
Surveying, mapping & networks
TOPDEC turns field conditions into reliable geographic data: surveys, geodesy, utility detection and georeferencing, GIS mapping and telecom studies. Deliverables are designed for engineering, construction, operations and asset-data updates.
Our services
Capture, structure and deliver field data
Accuracy, coordinate system and delivery formats are defined from the outset of each assignment.
Geodesy and GNSS
Connection to reference systems, traversing, control points, GNSS observations and checks to ensure data consistency.
Utility detection
Location of underground and overhead networks: electricity, gas, telecoms, fibre, potable water, wastewater and stormwater.
Georeferencing and as-built surveys
Positioning of assets, preparation of as-built drawings and organisation of attributes required for asset operation.
GIS and mapping
Geographic database structuring, thematic mapping, spatial analysis and decision-support outputs.
FTTH and FTTA studies
Fibre-network surveys and studies, routes, existing infrastructure, layout plans and load calculations for overhead supports.
Data ready for immediate use
From the field to the information system
Available services
- Reconnaissance and survey planning
- Terrestrial surveys, GNSS and levelling
- Utility detection and marking
- Setting-out and asset checks
- Post-construction as-built survey
- GIS integration, cleaning and updating
Deliverables
- 2D or 3D topographic drawings
- Longitudinal and cross profiles
- Georeferenced utility drawings
- Coordinate files and control points
- GIS databases and attributed layers
- Thematic maps and as-built packages
Our method
Preserving data traceability
Prepare
Definition of survey extent, required accuracy, reference system, coding and delivery formats.
Capture
Field measurements and redundant checks tailored to site and assignment constraints.
Check
Closure checks, geometric consistency, cleaning and object classification.
Deliver
Production of structured drawings and data ready for project or operations teams.
Domaines d’application
Geographic data serving projects
Roads and utilitiesUtility networksFibre opticsLotissementsIndustrial sitesUrban assetsConstruction sitesGIS management
A site to survey or a network to map?
Tell us the survey extent, required accuracy and preferred formats. We will develop a suitable capture and delivery method.