Provides read/write access to feature data in an SDF-based data store. Autodesk's geospatial file format, SDF, supports multiple features/attributes, provides high performance for large data sets and interoperability with other Autodesk products, and spatial indexing. Although it does not support concurrency control (locking), the SDF file format is a valid alternative to RDBMS.

The SDF file format has the following characteristics:

• SDF files can be read on different platforms.
• The SDF file has its own spatial indexing.
• SDF files can store geometric and non-geometric data with minimum overhead.
• The SDF file format supports a single writer at any time, with multiple readers.

Supported Versions

Infra Suite supports following SDF versions:

• Spatial Database Format 3.0

Connection Capabilities

Data store provider supports following connection capabilities:

• Per command threaded.
• Dynamic spatial content extent.
• Flush.

Schema Capabilities

Data store provider supports following schema capabilities:

• Schema modification.
• Feature classes with and without geometry.
• Characters that cannot be used for a schema element name are "." and ":".
• Association properties.
• Exclusive value range constraints.

Geometry Capabilities

Data store provider supports following geometry capabilities:

• XYZM dimensionality.
• Geometry component types: Ring, LinearRing, CircularArcSegment, and LineStringSegment.
• Geometry types: Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, MultiGeometry, CurveString, CurvePolygon, MultiCurveString, and MultiCurvePolygon.