Topo Services
Your surveying team in Reunion Island
Well-known since 2003 for our expertise in topography and certified in network georeferencing, we can assist you in all types of topographical surveys, in Reunion Island and all across the Indian Ocean.
Mastering a large set of technologies and having access to high-end tools and equipment, our surveyors will know how to adapt themselves to your project constraints and ensure precise results, no matter the circumstances.
Contact usWhat is topography ?
Topography is the study of the land surface, which allows us to measure and to map the visible objects, aspects and shapes present on a terrain. Those objects can be natural (trees, landform ...) or artificial (roads, buildings, structures ...) : this mapping aims to define the planimetric and altimetric position of all the points present in a certain area at a certain level of precision.
The business core of TOPO Services is topography : our team is composed of surveyors and topographers from different backgrounds, from baccalaureate to engineering school graduates. Thanks to our diverse skills and tool set, we can adapt to all situations and provide our clients with the most relevant solutions depending on their needs and project constraints.
It is necessary, for all projects and no matter their scale, to map the terrain beforehand. A high-quality survey will result in a better control of project costs, from the preliminary study itself to the project conclusion. Internal control at each step of the survey, through information and collected data crossing, will ensure the results reliability.
Continous technological advancement in topography has eventually led us to a quicker and more precise measurement than before.
New technologies (robotic stations, drones, GPS, mobile mapping…) are merely tools provided to the surveyor / topographer to help him conduct its mission. Those technologies will never replace the know-how and specific techniques used by the surveyor to comply with good engineering practices. Topography is a job in itself, no one can improvise himself as a surveyor. There are good practices which have to be complied with in order to ensure the required results precision and data collection techniques to know and master.
Nowadays, surveyors / topographers conduct surveys on opened or closed networks. In the case of opened trench record drawing, the surveyor must be certified in georeferencing. In the case of closed trench, the surveyor must be certified in network detection. TOPO Service is certified by Bureau Veritas in geo-referencing and soon-to-be certified in network detection.
Pros and cons of traditional topography
Very precise measurements
The main advantage of traditional topography techniques, applied by a technician and his basic surveyor tools, resides in its millimeter-scale accuracy. This basic equipment includes a total station, a precision level useful for the survey tools positioning and all the documentation and already collected data (civil engineering, control reports, expertise documents, leveling and topographical surveys, etc.).
Difficult set up depending on the survey area
As manual surveys, the main limit of those techniques resides in the surveyed area accessibility. Nonetheless, thanks to new surveying technologies, the use of drones can now free us of this constraint, but at the cost of other technical and legal constraints.
Our technical equipment
The equipment made available to our teams is regularly renewed. In this regard, due attention is paid to the surveyors tools upgrade for the continous improvement of our surveys accuracy. Our current tools are listed below :
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Five Leica theodolites
Two TS15 1', one TS15 5', one TS16 3' and one MS50 1'
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3 Leica GPS + 1 Leica GS10 movable pivot
GS14 and GS18 models
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leveling tools
DNA03 electronical level with 2m invar staff and the adequate equipment for precision leveling
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Detection tools (rented)
DS2000 and CAT4+
A few of our works
Topography
Topographical survey
Survey conducted with the use of a GPS and a theodolite – Survey of the 55ha area updated annually.
Setting up of a polygonal traverse for the topographical survey of the area. This survey has been rendered as a topographical plan and a Digital Terrain Model based on 3d slope rupture lines.
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Area of intervention
ISDND at Pierrefonds, in St-Pierre
Topography
Record drawing of an allotment
The survey was conducted during works advancement to realize a complete general as-built drawing.
Topographical plan rendered with separate layers for the EU and EP networks.
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Equipments used in this project
TS16 3’ and GPS
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Area of intervention
La Saline-les-Bains
Reunion Island
Topography
Precision leveling project
Double Chowlesky leveling with a leveling tool and two sights on two parralel ways on RN1 emergency lane.
We spent three days conducting a 7 kms double-leveling with the opening and closing of the pathways on 5 leveling reference points. The results have been rendered as an excel spreadsheet showing surveyed points altimetry.
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Area of intervention
Route du Littoral (NRL construction site)
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Equipments used in this project
DNA03 and two 2m invar staffs + footplates
Topography
Polygonal traverse monitoring
As external monitors on specific projects, we sometimes have to monitor what construction companies are currently building. We can as such monitor polygonal traverses, implementations, etc.
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Equipments used in this project
MS50 1’ with forced centering tools
Topography
Roland Garros Airport Project
Angular setting and accuracy implementation for solar-panels support frames.
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Area of intervention
Sainte-Marie, Reunion Island
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