Merge pull request #325 from asam-ev/324-add-link-to-opendrive

Add link to OpenDRIVE

content/geometry/object-environment/environment-structure.adoc

@@ -29,7 +29,7 @@ end legend
 
 The environment consists of the terrain, buildings, objects, and traffic areas, for example roads. It also includes all stationary traffic items, such as traffic signals, signs or lights.
 
-If applicable, the origin of this inertial coordinate frame should match that of the corresponding OpenDRIVE map.  
+If applicable, the origin of the root should match the https://publications.pages.asam.net/standards/ASAM_OpenDRIVE/ASAM_OpenDRIVE_Specification/latest/specification/08_coordinate_systems/08_02_inertial_coordinate_system.html[inertial coordinate frame] of a corresponding OpenDRIVE map.
 
 [#tab-Environment-Grp-Root]
 .Grp_Root
@@ -39,7 +39,7 @@ If applicable, the origin of this inertial coordinate frame should match that of
 2+^| <Header>
 
 | *Origin*
-| Origin of the inertial coordinate frame, matching the inertial coordinate frame of an associated OpenDRIVE map (if available).
+| Origin matching the https://publications.pages.asam.net/standards/ASAM_OpenDRIVE/ASAM_OpenDRIVE_Specification/latest/specification/08_coordinate_systems/08_02_inertial_coordinate_system.html[inertial coordinate frame] of an associated OpenDRIVE map (if available).
 
 | *x-axis*
 | Pointing to the right (east for maps with geographic reference).