Leveling marks of the geodetic canvas of Rennes Métropole
Description
This layer of points is one of the elements of Rennes Métropole’s geodetic canvas.
For information, a canvas is a set of geodetic points known in position and used as a frame for the realisation of a topographic survey.
Leveling marks are points materialised by a mark most often sealed in a wall (building, post, bridge stack...) whose altitude is precisely determined (planimetric positioning X, Y of the markers of this layer is metric).
Details:
In planimetry, the total precision class applicable to canvas peaks is 2 cm on the territory of the City of Rennes and 2.5 cm on the rest of the territory of Rennes Métropole.
In altimetry, the precision class for the IGN and Rennes Métropole networks applicable to canvas tops is 1 cm.
Attention: Given the risks of moving or moving geodetic points, it is essential to link topometry operations to several nearby geodetic points, in order to ensure their stability. No liability can be incurred in the absence of such control. Any comments concerning the destruction, disappearance or poor condition of the geodetic points belonging to the network of Rennes Métropole must be reported at sig@rennesmetropole.fr.
This layer is available via the IGN geodetic sheet server.
Resources
| Name |
Format |
Description |
Link |
|
23 |
|
https://www.data.gouv.fr/api/1/datasets/r/41e75896-b22b-41a2-be24-6c57ca6d180b |
|
23 |
|
https://www.data.gouv.fr/api/1/datasets/r/ef34de15-53c3-431b-ad22-e20e2d669e6f |
|
8 |
|
https://www.data.gouv.fr/api/1/datasets/r/c28cebb8-fa14-419e-b9ce-d16cdd86a794 |
|
57 |
|
https://www.data.gouv.fr/api/1/datasets/r/8298e6cb-2a6f-49dd-9189-50e727ebc864 |
Tags
- altitude
- referentiels-geographiques