Geometryfrom a byte stream in Well-Known Binary format.
Supports use of an
InStream, which allows easy use
with arbitrary byte stream sources.
This class reads the format describe in
It also partially handles
the Extended WKB format used by PostGIS,
by parsing and storing SRID values.
The reader repairs structurally-invalid input
(specifically, LineStrings and LinearRings which contain
too few points have vertices added,
and non-closed rings are closed).
This class is designed to support reuse of a single instance to read multiple
geometries. This class is not thread-safe; each thread should create its own
As of version 1.15, the reader can read geometries following OGC 06-103r4
speification used by Spatialite/Geopackage.
The difference between PostGIS EWKB format and the new OGC specification is
that Z and M coordinates are detected with a bit mask on the higher byte in
the former case (0x80 for Z and 0x40 for M) while new OGC specification use
specif int ranges for 2D gemetries, Z geometries (2D code+1000), M geometries
(2D code+2000) and ZM geometries (2D code+3000).
Note that the
WKBWriter is not changed and still write PostGIS WKB