What is the context

CRS (Coordonate Reference System)

CRS is a geodesic system used to locate a position close to the surface of the earth

Two types of CRS exist:

• GCS (Geographic Coordinate System) using the earth designed in 3D -> Position defined by angles (latitude and longitude) from Equator and GreenWich meridian.
  PCS (Projected Coordinate System) using the projection of the earth on a 2D surface –> Position defined by the distance in meter from the origin of the projection area considered. The earth is divided by multiple 2D areas that partially overlapping and so the choice of the area is essential to have a good accuracy.

Choose your area for PCS

There are several standards to define area, one of the best known and used is the EPSG (European Petroleum Survey Group). Go to the web site epsg.io to determine area that is fitting the best to the need. You can check open data next to the project’s location and choose the area that includes it.

In AEC data model, AEC objects allow geolocation whereas it is not the case for standard objects.

Exemples :

WGS 84 (EPSG 4326) used for location around the world

Lambert 93 (EPSG 2154) used for location around France
User Assistance about Geolocation : https://help.3ds.com/2021x/english/dsdoc/geodtmousermap/geolocation-c.htm?contextscope=cloud

User Assistance about CRS : https://help.3ds.com/2021x/english/dsdoc/trnusermap/geolocation-c-crs.htm?contextscope=cloud

How is this covered by the existing portfolio

There are three Geolocation usages in CATIA and CITY :

1. You want to perform a single import without setting up a project framework
2. You want to set up that all users work on same CRS for the project
3. You want to combine GIS and BIM data  

Usage 1 : Perform a single import without setting up a project framework

​​​​​​Videos :

Apply CRS and update location

Check origin and align Design in context ​​​​​​​

Usage 2 : Set up that all users work on same CRS for the project

​​​​​​​

Videos :

Assign CRS to Data Setup

Apply CRS and update location Design in context

Usage 3 : Combine GIS and BIM data

Videos :

Create referential

City navigation and location Geocoding source file import and setup ​​​​​​​Geocoding usage

Where can I find more information

• User Assistance about Geolocation : https://help.3ds.com/2021x/english/dsdoc/geodtmousermap/geolocation-c.htm?contextscope=cloud
• User Assistance about CRS : https://help.3ds.com/2021x/english/dsdoc/trnusermap/geolocation-c-crs.htm?contextscope=cloud
• User Assistance about Identifying a CRS and Importing it : https://help.3ds.com/2021x/english/dsdoc/geodtmousermap/geolocation-t-crsidentify.htm?contextscope=cloud