Direction of PIDF-LO Profile

1
Direction of PIDF-LO Profile

• James Winterbottom

2
Problems

• PIDF-LO profile has suffered from feature creep
• Base level GML is designed to define complex
  shapes. It is designed to support the creation of
  application schema and profiles.
• PIDF-LO profile has a lot of information on how
  to describe complex shapes using base GML A bad
  idea!

3
Suggested Direction

• Keep the rules on location selection.
• Keep guidelines on well-formed PIDF-LO
  production.
• Reduce the subset of shapes to
• Point - 2D only
• Point and radius - 2D only
• Polygon - 2D only
• Rectangular prism (required for RFC-3825
  representations). -3D
• Keep CRS recommendations. WGS-84 only using
• EPSG4326 for 2D
• EPSG4979 for 3D

4
Suggested Direction

• Provide examples of what MAY be acceptable
  levels of precision for some applications. We
  could site US specific cases for Geodetic and
  civic emergency requirements.
• Include specific comment that precision will be a
  matter of application requirements and local
  policy.
• Keep the appendix shoring how to create a PIDF-LO
  from data received in geodetic DHCP option.

5
Suggested Direction

• Complete this quickly re-submit document and
  start WG LC proceedings.