Crate oxirs_geosparql 

OxiRS GeoSPARQL

Status: Production Release (v0.2.4) Stability: Public APIs are stable. Production-ready with comprehensive testing.

GeoSPARQL implementation for spatial data and queries in RDF/SPARQL.

This crate provides:

• GeoSPARQL vocabulary and datatypes
• WKT (Well-Known Text) geometry parsing and serialization
• Simple Features topological relations (sfEquals, sfContains, sfIntersects, etc.)
• Geometric operations (buffer, convex hull, intersection, etc.)
• Geometric properties (dimension, SRID, isEmpty, etc.)
• Spatial indexing with R-tree for efficient queries
• SIMD-accelerated distance calculations (2-4x speedup)
• Parallel batch processing for large datasets

Example

use oxirs_geosparql::geometry::Geometry;
use oxirs_geosparql::functions::simple_features;

// Parse WKT geometries
let point = Geometry::from_wkt("POINT(1.0 2.0)").expect("should succeed");
let polygon = Geometry::from_wkt("POLYGON((0 0, 4 0, 4 4, 0 4, 0 0))").expect("should succeed");

// Test spatial relations
let contains = simple_features::sf_contains(&polygon, &point).expect("should succeed");
assert!(contains);

GeoSPARQL Compliance

This implementation follows the OGC GeoSPARQL 1.0/1.1 specification:

• Core: Geometry classes and properties
• Topology Vocabulary: Simple Features relations
• Geometry Extension: WKT and GML support
• Query Rewrite Extension: Spatial indexing

Features

• wkt-support (default): WKT parsing and serialization
• geojson-support: GeoJSON support
• geos-backend: Use GEOS library for geometric operations
• proj-support: Coordinate transformation support
• parallel: Parallel processing for large datasets

Re-exports

pub use aggregate::aggregate_bounding_box;

pub use aggregate::AggregateBoundingBox;

pub use aggregate::BoundingBoxResult;

pub use aggregate::GEO_AGG_BOUNDING_BOX;

pub use crs::crs_literal::encode_crs_wkt_literal;

pub use crs::crs_literal::parse_crs_wkt_literal;

pub use crs::crs_literal::CrsGeometryTransformer;

pub use crs::crs_literal::CrsLiteral;

pub use crs::crs_literal::CRS84_URI;

pub use crs::crs_literal::GEO_CRS;

pub use crs::crs_literal::GEO_WKT_LITERAL;

pub use crs::osgb36::coordinate_to_osgb_grid_ref;

pub use crs::osgb36::osgb_grid_ref_to_coordinate;

pub use crs::osgb36::OsgbCoordinate;

pub use crs::utm::utm_to_wgs84_batch;

pub use crs::utm::wgs84_to_utm_batch;

pub use crs::utm::UtmCoordinate;

pub use crs::utm::WgsCoordinate;

pub use crs::CrsKind;

pub use crs::CrsTransformer;

pub use crs::GeometryWithCrs;

pub use error::GeoSparqlError;

pub use error::Result;

pub use functions::ogc11::area_with_unit;

pub use functions::ogc11::area_with_unit_uri;

pub use functions::ogc11::concave_hull;

pub use functions::ogc11::distance_with_unit;

pub use functions::ogc11::distance_with_unit_uri;

pub use functions::ogc11::length_with_unit;

pub use functions::ogc11::length_with_unit_uri;

pub use functions::ogc11::UnitOfMeasure;

pub use functions::ogc11::UOM_PREFIX;

pub use geometry::geometry3d::BoundingBox3D;

pub use geometry::geometry3d::Geometry3DEnum;

pub use geometry::geometry3d::LineString3D;

pub use geometry::geometry3d::LinearRing3D;

pub use geometry::geometry3d::Point3D;

pub use geometry::geometry3d::Polygon3D;

pub use geometry::Crs;

pub use geometry::Geometry;

pub use index::SpatialIndex;

pub use index::PureRTree;

pub use index::RTreeBBox;

pub use index::RtreeEntry;

pub use index::SpatialRtreeIndex;

pub use performance::BatchProcessor;

Modules

aggregate

SPARQL Spatial Aggregate Functions (v0.2.0)

analysis

Advanced Spatial Analysis

area_calculator

Area calculations for geographic polygons.

bounding_box

Bounding box (Envelope) operations for spatial queries.

clustering

Spatial clustering algorithms (DBSCAN with Haversine distance). Spatial clustering algorithms.

convex_hull

2D convex hull computation using the Graham scan algorithm (v1.1.0 round 14). 2D convex hull computation using the Graham scan algorithm.

coordinate_converter

Coordinate system conversions: WGS84 ↔ Web Mercator, plus Haversine distance (v1.1.0 round 16). Coordinate system conversions for GeoSPARQL.

coordinate_transformer

CRS coordinate transformations: WGS84 ↔ UTM ↔ WebMercator. Coordinate Reference System transformations: WGS84 ↔ UTM ↔ WebMercator.

crs

Coordinate Reference System (CRS) implementations

crs_transform

Coordinate Reference System (CRS) Transformation Pipeline

distance_calculator

Geodesic and Euclidean distance calculations for GeoSPARQL.

error

Error types for GeoSPARQL operations

functions

GeoSPARQL filter and property functions

geo_serializer

Geometry serialization to WKT, GeoJSON, and simplified GML 3.

geometry

Geometry types and operations

index

Spatial indexing for efficient GeoSPARQL queries

intersection_detector

Geometric intersection detection: point-in-polygon, line–line, polygon overlap, containment, touches, crosses, segment distance (v1.1.0 round 13) Geometric intersection detection for GeoSPARQL predicates.

performance

Performance utilities for large-scale geometric operations

raster_sampler

Raster grid sampling with multiple interpolation methods.

reasoning

Geospatial Reasoning (v0.2.0)

simplifier

Geometry simplification using Douglas-Peucker and radial distance algorithms (v1.1.0 round 15).

sparql_integration

SPARQL Function Integration

spatial_index

Spatial grid index for fast bounding-box queries. Spatial grid index for fast bounding-box queries.

topology_checker

Spatial topology checking implementing a simplified DE-9IM model.

validation

Geometry validation and quality checks

vocabulary

GeoSPARQL vocabulary and namespace definitions

wkt_parser

WKT (Well-Known Text) geometry parser and serializer.

wkt_writer

WKT (Well-Known Text) geometry serializer.

Macros

profile_scope

Macro for convenient profiling scope creation

Structs

GeoSparqlRegistry

GeoSPARQL function registry

Functions

init

Initialize GeoSPARQL support in a SPARQL engine