wiki:UsersWikiSprint2009Notes

Sprint 2009 Notes

General Actions

Attending

  • RO: Regina Obe
  • PR: Paul Ramsey
  • MCA: Mark Cave Ayland
  • OC: Olivier Courtin

PSC

  • RO - formalize PSC membership rules and desires, talk w/ RRI about PSC

PostGIS 2.0 Goals

Geodetic Support

  • PG_LWGEOG
  • Backed into LWGEOM
  • Alter LWGEOM to add "geographic bit"
  • write menu of functions of things we need to do
  • spherical indexing (q3c)
  • PR - research and give recommendation on indexes
  • PR - recommendation on serialization changes
  • PR - RFC on implementation

TypeMods to turn GEOMETRY_COLUMNS into a view

  • MCA - build prototype and see?
  • MCA - RFC on typmod for 2.0

Routing in the Database

  • embed graphserver in pgsql
  • load edges from pgsql tables
  • float graphserver structures into higher memory context
  • PR - investigate effort and do RFC

Handling of EMPTY geometries

  • Document what LWGEOM conditions constitute "empty"
    • POINT => pa == NULL
    • LINE => npoints == 0
    • POLYGON => nrings == 0
    • COLLECTION => ngeoms == 0 (already handled) MCA - fix unparser to respectfully write those out (all types)

LWGEOM Header

What are our goals for re-writing our serialization? And handling thereof.

  • Room for more types.
  • Account for future changes ? (versioning) (PR - No!)
  • Aligned double?
  • Prototype vardata type w/ double* and compare speed of direct access w/ copied access for some ops
  • PR - do performance prototype
  • PR - finalize RFC for new serialized form

ISO Official Formats

  • BREAKING CHANGE: SRID=0 is no-value
  • "Be liberal in what you accept, conservative in what you emit."
  • Only emit proper ISO formats
  • WKB, use the ISO/SFSQL2 type codes
  • WKT, use the official Z/M modifiers (eg POINT Z (1 2 3), POINT ZM (1 2 3 4))
  • What does SFSQL2 say ST_Asbinary should emit? highera dimensionality? (probably)
  • OC - Handle GeomFromGML() / GeomFromKML()
    • need estimate / RFC
    • Will need to link libxml

"Package" infrastructure for PostGIS

  • MCA - Bug PgSQL-hackers and establish requirements

Deprecating ST_ handing in Dependent Apps

  • PR - Mapserver (change for 5.4?)
    • Ask if people mind losing support for PostGIS < 1.2
  • PR -- Geoserver (change for ??)
  • PR - FME
  • PR - CadCorp

SRTEXT handling

  • PR - Formalize our generation of SPATIAL_REF_SYS from EPSG database
  • PR - Handle SRTEXT erratta from the mailing list so we don't lose projection fixes anymore
  • PR - embed EPSG database version number in #define at the time we build SPATIAL_REF_SYS.sql

WKT Raster

  • By summer, raster/vector intersections() and out-db raster support
  • Integrate with PostGIS 2.0, if PSC determines there is enough functionality to warrant.
  • Allow binary-only dependency (more generally a PostGIS plan)

Topology support

  • OC: based on Sandro previous work and SQL MM 2.0
    • concrete needs: simplify working with lat/lon geom and topology compliant
    • requires: build topology from set of polygons (snap and clean and build)

3D

  • OC - SQL/MM PolyhedralSurface type
    • CGAL librairie form intersection stuff ???
    • CityGML and Collada export
    • 3D GIST index support
Last modified 8 years ago Last modified on Apr 14, 2009 1:42:52 PM