USE GEOCASSINI IN FIBER OPTIC NETWORK PROJECTS

1. STUDY PHASE (PRE/PRO)

2. WORKS MANAGEMENT

3. NETWORK MAINTENANCE

1. STUDY PHASE (PRE/PRO)

1.1 THE DATA NEEDED FOR THE STUDIES:
NATURE OÙ ? COMMENT ?
Orthophotos Open Data (IGN, others,…) DataBase repertory
Orthophotos Drone (specific productions) DataBase repertory
Cadastre Open Data API
Network managers Specific requests DataBase repertory
Survey Lidar Specific requests DataBase repertory
Topographic plan Specific production DataBase repertory
Diagnostics Specific production DataBase repertory
Network detection Specific production DataBase repertory
Each data contained in DataBase is shareable and downloadable.
Study managers thus have all the data necessary to conduct their studies, which can be used independently of GeoCassini in their own business applications

To note: GeoCassini’s “GeoStore” feature allows any external application to be directly connected to DataBase.

Study managers can themselves upload and share additional data from their research and work.
Network managers can be imported from CAD or GIS software in .dxf, .dwg, .shp formats. json. kml, etc.
To note : generally the network plans are in 2D. GeoCassini makes it possible to integrate these plans by automatically assigning them an altitude from lidar data (reference altitude or depth).
Carry out a Lidar survey of the study area
WHY ?
The lidar survey makes it possible to describe the study area in the form of a cloud of colorized, 3D, exhaustive points of centimetric precision.
This point cloud is then used in GeoCassini to :
• produced a topographic plan
• navigate dynamically and immersively in the study area facilitating the identification of particular points and facilitating “field” diagnostics
• integrate the different planning hypotheses, measure their impacts
• present to the target audiences the evolutions of the project
• facilitate the examination of authorizations and the resulting exchanges
• improve exchanges and collaboration between all parties involved in the development of the area
• facilitate the consultation of companies
• monitor the execution of the work
• produce 2D and 3D digital DOEs
HOW ?
Through fixed scanners (on a tripod), mobile scanners (backpacks, on board vehicles or drones), or by processing orthophotos in digital photogrammetry.
example of a topographic plan produced from a lidar survey
1.2 “FIELD” DIAGNOSTICS
The project is developed from the “field” diagnostics of existing equipment. This diagnostics is carried out directly in GeoCassini by exploiting the “digital twin” in point clouds of the study area. The digital twin is enriched with available data (cadastre, map of existing networks, panoramic photos, photos of poles and their labels)
To note : on-site trips are considerably reduced and can be limited to one in the study control phase.
1.2.1 Case of overhead networks – data needed for the study

• statement of each pole individually – type of existing overhead networks – number of cables

Answer : The data collected, from the digital twin of the streets, makes it possible to clearly identify each pole and to have its centimetric position. The panoramic photo gives the detail of each layer of networks.

• height of cables – angles of cables – height of poles – height available to install a new network

Answer 1 : Measurements are taken directly from the point cloud and can be exported to load calculation software
Answer 2 : example of angle measurements between cables
• centimetric position of the poles – nature and condition of the poles – pole labels distances between poles – position of poles in relation to the road, sidewalks, existing houses – statement of letterboxes

Answer 1 : you can easily measure distances between poles, distances from sidewalks, buildings, angles, heights, number and position of mailboxes

Answer 2 : the position of each pole is known to the centimeter and the coordinates of the column bases are easily retrieved and exported
Answer 3 :the nature, the state of the poles, the labels of the poles are easily integrated into GeoCassini using the metadata associated with the objects. The identification data provided by the network manager are thus updated, corrected if necessary, and in all cases completed with the “field” diagnostics.
Answer 4 : the individual diagnositic of each polet is easily accessible and exportable using GeoCassini’s “EDM” mode.
“EDM” view of the data associated with the pole
“EDM” view of fixing the network on the pole
“EDM” view of fixing the network on the pole
“EDM” view of the column label
1.2.2 Case of underground networks – data necessary for the study

• Import des réseaux existants

Answer 1 : GeoCassini allows the import of “.shp” files provided by network managers directly into the digital twin of the study area.

Answer 2 : if the “.shp” files contain “altitude” or “depth” information, this is automatically taken into account to position the network at the correct depth.
Answer 3 : If this information is missing, the import can be done by indicating a theoretical altitude or depth in relation to the altimetric position of the digital twin.
Import of existing networks
Immersive view of importing an existing underground telecom network
• Position of existing telecom chambers
• The digital twin of the study area gives the exact position of the outcrops of existing telecom and edf networks.
To note : thanks to the digital twin, you can easily correct the position of the networks resulting from the “.shp” import
Aerial view of a section of street
View of a telecom outcrop
• Survey of existing telecom outcrops
Each telecom equipment is highlighted by short videos taken with a smartphone. The video is automatically transformed into georeferenced point clouds with the RezoCassini application. It is thus easy to identify the reservations available in the telecom equipment to run the new fiber network.
Example of a 3D view of a telecom equipment
Examples of telecom equipment photos stored in GeoCassini’s EDM

To note 1 : you can complete the description of a telecom equipment with 4 photos of the 4 sides of the room. These photos will be associated as metadata
To note : the nomenclature of the telecom equipment resulting from the “.shp” import is kept in metadata.

1.3 THE DEFINITIO N OF THE PR OJECT
1.3.1 Case of aerial networks

• Load calculations from “field” survey data Measurement data from the “field” survey is exported to load calculation software.

To note :GeoCassini’s “GeoStore” function makes it possible to integrate any external application into GeoCassini and thus simplify processing.
• Identification and counting of poles to be replaced
• Identification of the zones and volumes to be pruned as well as the means to be implemented.
• Identification of modes and fixing points on the poles
• Generation of exe plans in GeoCassini’s EDM
• Generation of quantities in GeoCassini’s GED
• GIS export
• Network trace on the digital twin in ortho mode
View of an area to be pruned with the corresponding panoramic photo
View of a connection point with the corresponding panoramic photo
1.3.2 Case of underground networks
• Identification of areas where the “existing” outcrops are not visible to plan either excavation work or the installation of new equipments
• The technical implementation specifications are associated in metadata
• Generation of exe plans in GeoCassini’s EDM
• Generation of quantities in GeoCassini’s GED
• GIS export
2. WORKS MANAGEMENT
2.1 MANAGEMENT OF THE OPERATION
2.1.1. Assistance in consulting works companies
• provision of the elements of the project necessary for the costing of the works by the companies (control of the quantities, the available data (networks), the locations of the works to be carried out, etc.)
• Management of responses from construction companies through the DataBase in the directories reserved for this purpose
• Procurement management and safeguards
• Management of service orders and their history
2.1.2. Authorization management
• Road occupations
• Rights of way for networks
• Pruning, …
2.1.3. Network detection
Stored in the DataBase, they directly update the project, either by vector imports, or by direct interpretation in the project.
Example of network detection by direct interpretation
video capture of ground markings transformed into point clouds
3D drawing of the georeferenced layout (cm) of the networks
2.1.4. Technical installations
• Export of the coordinates of the remarkable points of the network elements to be implemented from the Project
• Classic layout of remarkable points
• Special assistance for setting up NROs.
• Search for buried networks with the augmented reality application connected to GeoCassini.
2.2 SURVEY OF WORKS.
• They are made with the RezoCassini application.
• RezoCassini automatically transforms videos taken with a smartphone, a gopro, into colorized 3D point clouds.
• RezoCassini then makes it possible to georeference the point clouds obtained either from GPS calibration points, or -simpler and faster- from points of existing point clouds prior to the work.
With a GoPro
With a GoPro
With a GoPro
With a smartphone
With a smartphone
With a smartphone
Examples of survey of sewerage networks

To note : possibility of filling in the nomenclature of each piece of network installed

Other examples of inventory in an urban site
Drinking water connections
Drinking water connections
Laying of a pipe
2.3 3D digital DOE – Retrocession of equipment
• Superimposition of the project of the network plans with the verification of the works
• Drawing of networks from point clouds of work to establish as-built plans.
• the trench cuts make it possible to justify compliance with the trench structure when carrying out the work.
• Control of equipment installations using the EDM mode of GeoCassini
georeferenced 3D survey of civil engineering chambers
Pictures of connection points

• Control of the laying of the network on the poles by exploiting the EDM mode of GeoCassini

• Control of non-conformities by using GeoCassini’s EDM mode

• Classic delivery of the DOE supplemented with its definition in 3D AS (As Built).
Extract from the fiber optic network layout map
Extracted from the same network in the digital twin
3. NETWORK MAINTENANCE
The 3D digital twin of territory brings an exceptional added value in the daily maintenance of a fiber optic network.
From a simple import shape, the desired network data is integrated into the 3D digital twin.
The latter is therefore the Saas Daas support (PC, tablet, smartphone) for any possible intervention.
3.1 Using the “EDM” mode
• Each object (point, line, surface) in GeoCassini associates an unlimited number of metadata (text, drop-down lists, files, photos, 3D objects, etc….)

• Each piece of network equipment is thus identified, centimetrically geolocated, documented, represented in 3D,…: the possibilities are unlimited

• Stored in the DataBase, all this information can be used dynamically to :
– Prepare “Field” interventions
– Control the execution of “Field” interventions
– Prepare subscriber connection interventions
– Manage connection interventions

3.2 Treatment of non-conformities
Examples of intervention on station
The processing of non-conformities is managed dynamically and in real time in the digital twin.
3.3 Help connecting subscribers
• Use of the augmented reality application to find buried networks,
• Use the GED mode in monitoring connection work with the customer
• Preparation of the field intervention with data from the digital twin

Example of data available for connection to overhead network the connection point and the subscriber to be connected are perfectly defined.
Connection conditions are precise, measurable and quantifiable The verification of the connection is just as fast

Example of data available for connection to the underground network.
Position of the connecting outcrop in relation to the house
Connection equipment detail
Detail of the connection point in a building
IN CONCLUSION
The development of optical fiber projects is most often entrusted to delocalized companies, whose establishment is very far from the places of intervention.

The data they have is mainly 2D and partial, which directly affects the quality of the project.
It is the companies in charge of the works who must compensate, in the exe phase, for the approximations of the project.

How does GeoCassini correct this situation?

On projects already completed:
– A simple “Shp” import of the completed project allows it to be compared to the reality exposed by the digital twin.
– Non-conformities can be easily dealt with.
– The network manager has a powerful tool to ensure any type of efficient intervention in the field and to monitor it.

On projects to be carried out:
The exploitation of the digital twin of territory under GeoCassini makes it possible to ensure
• the relevance of the development of the project due to the completeness and precision of the data provided
• real-time monitoring of operational performance
• the delivery to the operator of the digital twin of its network to ensure its efficient maintenance.

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