EWKB (Extended WKB)
A PostGIS extension to WKB that can include SRID and additional flags.
Category: Formats
Definition (expanded)
EWKB is commonly produced by PostGIS and some tooling to carry SRID and other metadata. Many converters can decode EWKB into WKT or GeoJSON while preserving SRID if present.
Related terms
WKB (Well-Known Binary)A compact binary format for geometries, widely used in spatial databases and APIs.PostGISA spatial extension for PostgreSQL that adds geometry types, indexes, and functions like ST_Intersects and ST_Union.SRIDA numeric identifier for a coordinate reference system used by some databases and formats (especially PostGIS and EWKB).EndiannessThe byte order used to encode binary numbers, such as little-endian or big-endian.Hex (hexadecimal)A text encoding that represents bytes using characters 0-9 and a-f, common for WKB strings.Base64A text encoding that represents bytes using A-Z, a-z, 0-9, +, and /, also used for WKB in some APIs.