This commit updates to the latest btree and rtree.
The rtree algorithm has been modified in `tidwall/rtree@v1.7`
which now keeps internal and leaf rect sorted by the min-x
coordinate. This make for much faster (up to 50%) faster
searches and replacements, but slightly slower inserts.
Because of the R-tree update, the tests needed to be updated to
account for the change in order for undeterministic WITHIN and
INTERSECTS commands.
Each MATCH is inclusive OR, thus
WITHIN fleet MATCH train* truck* BOUNDS 33 -112 34 -113
will find all trains and trucks that within the provides bounds.
The returned distance value for the kNN test was failing on a
Apple M1 machine. The test expected a hardcoded value.
amd64: 13053.885940801563
apple: 13053.885940801567
Not sure why the difference between the two cpus but I changed
the test to not compare for exact equality.
This commit allows for buffering any GeoJSON object.
For example:
INTERSECTS fleet BUFFER 1000 OBJECT {...LineString...}
This will buffer add a 1 kilometer buffer to a linesting and
search the 'fleet' collection for all objects that
intersect the buffered linestring.
This commit also allows for performing INTERSECTS with a POINT
type. Thus allowing for a polygon-over-point operation, which is
an inverted point-in-polygon.
The big change is that the GeoJSON package has been completely
rewritten to fix a few of geometry calculation bugs, increase
performance, and to better follow the GeoJSON spec RFC 7946.
GeoJSON updates
- A LineString now requires at least two points.
- All json members, even foreign, now persist with the object.
- The bbox member persists too but is no longer used for geometry
calculations. This is change in behavior. Previously Tile38 would
treat the bbox as the object's physical rectangle.
- Corrections to geometry intersects and within calculations.
Faster spatial queries
- The performance of Point-in-polygon and object intersect operations
are greatly improved for complex polygons and line strings. It went
from O(n) to roughly O(log n).
- The same for all collection types with many children, including
FeatureCollection, GeometryCollection, MultiPoint, MultiLineString,
and MultiPolygon.
Codebase changes
- The pkg directory has been renamed to internal
- The GeoJSON internal package has been moved to a seperate repo at
https://github.com/tidwall/geojson. It's now vendored.
Please look out for higher memory usage for datasets using complex
shapes. A complex shape is one that has 64 or more points. For these
shapes it's expected that there will be increase of least 54 bytes per
point.
Benjamin Ramser