DIGGS Linear Referencing Schema - Version 3.0b
            
This schema provides comprehensive linear referencing capabilities for 
any DIGGS linear sampling features, including boreholes, wells, 
soundings, and geophysical tracklines.
            
Based on ISO 19148:2021 (Linear referencing) adapted for geotechnical 
and geoenvironmental contexts. This schema removes transportation-specific 
concepts (lanes, routes, addresses) and adds geotechnical-specific 
referents and methods.
            
Linear referencing in DIGGS is based on distance measurements along 
LinearExtent features, which are DIGGS extensions of gml:LineString, typically
with 3D coordinates. All measurements proceed in coordinate order from the first 
coordinate (or referent coordinate) to the last coordinate in the gml:posList, 
regardless of spatial orientation (vertical, horizontal, or deviated). Spatial 
direction can be optionally provided by the positiveDirection property of the 
LRMethod.
            
Key ISO 19148:2021 Concepts Implemented:
- §6.2: Linear Referencing Method (LRMethod)
- §6.3: Linear Element (LinearExtent)
- §6.4: Linear Spatial Reference System (LinearSRS)
- §7.2: Linear Position (via gml:Point with srsName)
- §7.3: Linear Location (intervals via gml:LineString with srsName)
            
Copyright (c) DIGGS 2025. All rights reserved.

DIGGS Linear Referencing Schema - Version 3.0b
            
This schema provides comprehensive linear referencing capabilities for 
any DIGGS linear sampling features, including boreholes, wells, 
soundings, and geophysical tracklines.
            
Based on ISO 19148:2021 (Linear referencing) adapted for geotechnical 
and geoenvironmental contexts. This schema removes transportation-specific 
concepts (lanes, routes, addresses) and adds geotechnical-specific 
referents and methods.
            
Linear referencing in DIGGS is based on distance measurements along 
LinearExtent features, which are DIGGS extensions of gml:LineString, typically
with 3D coordinates. All measurements proceed in coordinate order from the first 
coordinate (or referent coordinate) to the last coordinate in the gml:posList, 
regardless of spatial orientation (vertical, horizontal, or deviated). Spatial 
direction can be optionally provided by the positiveDirection property of the 
LRMethod.
            
Key ISO 19148:2021 Concepts Implemented:
- §6.2: Linear Referencing Method (LRMethod)
- §6.3: Linear Element (LinearExtent)
- §6.4: Linear Spatial Reference System (LinearSRS)
- §7.2: Linear Position (via gml:Point with srsName)
- §7.3: Linear Location (intervals via gml:LineString with srsName)
            
Copyright (c) DIGGS 2025. All rights reserved.