GeoSPARQL Standards Working Group Meeting Minutes
Meeting Details
Meeting Date: 01/22/2025
Meeting Time: 2004–2107
Meeting Location: Microsoft Teams
Note: Not a quorum.
Attendees
| Attendee |
Moniker |
| Matthew Perry |
MP |
| Paul Cripps |
PC |
| Timo Homburg |
TH |
Apologies
- Joseph Abhayaratna (JA)
- Nicholas Car (NC)
Absent
- Vladimir Alexiev (VA)
- Arkadiusz Chadzynski (AC)
Note Takers
Action Items From Last Meetings
| Done? |
Item |
Responsible |
Due Date |
| ⬜ |
Work out what publication of alignments in OGC Rainbow looks like |
NC |
Carried forward |
| ⬜ |
Present GeoSPARQL alignment material to JAG |
JA, NC |
Carried forward |
Discussion Items
| Time |
Item |
Who |
Notes |
| 20:04 |
Roll call and call for patents |
All |
- Roll call completed.
- No patents declared.
|
| 20:05 |
Previous actions |
All |
- No updates from JA or NC.
- NC to work out what publication of alignments in Rainbow looks like.
- JA and NC to present to JAG.
|
| 20:06 |
Other updates |
TH, PC |
- Geonovum meeting attended by TH, NC, PC, AC, Louis, and Rolf Jonker.
- Six participants plus additional volunteers agreed to write a GeoSPARQL 3D white paper on theory and applications.
- Group to meet fortnightly.
- TH to email JA about setting up a repository for white paper work.
- PC reported interesting discussions on extending RCC8 to 3D (RCC25).
- Discussion on scope of work and possibility of a reference implementation of RCC25 for a single literal type.
- TH noted lack of a de‑facto standard set of 3D spatial functions.
- TH suggested identifying equivalences between Simple Features and RCC25.
- PC noted equivalences for 2D relations are well understood.
- Reference to paper covering RCC25, RCC29, and RCC31: https://core.ac.uk/download/pdf/62645857.pdf
- TH referenced related GeoSPARQL issue: https://github.com/opengeospatial/ogc-geosparql/issues/416
- Additional references shared: https://www.mdpi.com/2220-9964/13/1/25 and https://www.semanticscholar.org/paper/3D-Topological-Relations-for-3D-Spatial-Analysis-Supangkat-Machbub/4879e45f30712f6966017db74daad675255226df
- TH discussed CityOWL use of GML literals for geometry representation.
- TH presented slides on possible representations for 3D objects in GeoSPARQL.
- TH added 3D vocabulary and alignments to the GitHub repository.
- Identified need for vocabularies, relations, and functions.
|
| 20:54 |
Issues and PRs |
All |
- Issue discussed: https://github.com/opengeospatial/ogc-geosparql/issues/610 — PC to post additional updates; discussion on disjoint concepts and distinctions between actual space, representation, and serialisation.
- Issue discussed: https://github.com/opengeospatial/ogc-geosparql/issues/609 — work in progress by AC.
- Issue discussed: https://github.com/opengeospatial/ogc-geosparql/issues/604 — TH queried how to represent matrices in GeoSPARQL; PC suggested RDF Data Cube approach.
- Issue discussed: https://github.com/opengeospatial/ogc-geosparql/issues/556 — TH raised question about extrusion in other dimensions (e.g. time, colour).
- PR discussed: https://github.com/opengeospatial/ogc-geosparql/pull/536 — TH still working on wording for implementers converting output to desired CRS.
|
| 21:07 |
Close |
All |
MEETING ENDS |
Action Items
| # |
Item |
Responsible |
Due Date |
| — |
No new action items recorded |
— |
— |