# Appendix

## Changes from version 1.0 to 1.1

- Speed up index query time. The index scan is much faster than in 1.0.

- Remove B-tree index. It was used to cluster the index.

- This version is compatible to PostgreSQL 8.4

## Changes from version 1.1 to 1.1.5

- Modify behavior of function `set_sphere_output_precision`.

- Compatibility with PostgreSQL 9.2 and later.

- Creating spath and spolygon objects "as aggregate" from tables should now work.

- Improved accuracy of spoint (great circle) distance calculation.

- Add new contains operators consistent with the geometry operators of the plain used in PostgreSQL 8.2 and later: <@ and @>, the old operators @ and ˜ still work.

- Improved correctness of spatial indexing.