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decode the binary informations of the Geometry columns
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liofr
*nix forums beginner


Joined: 10 Sep 2005
Posts: 5

PostPosted: Sun Oct 09, 2005 2:26 am    Post subject: decode the binary informations of the Geometry columns Reply with quote
HI
where i can find documentation about decode the binary informations of
the Geometry columns in mysql using C ?
for example
mysql doc say that
0x0101000000000000000000F03F000000000000F03F
is equivalent to
Point(1 1)

Thank's


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Paul DuBois
*nix forums Guru Wannabe


Joined: 09 Feb 2005
Posts: 153

PostPosted: Sun Oct 09, 2005 2:43 am    Post subject: Re: decode the binary informations of the Geometry columns Reply with quote
At 6:26 +0200 10/9/05, liofr wrote:
Quote:
HI
where i can find documentation about decode the binary informations
of the Geometry columns in mysql using C ?
for example
mysql doc say that
0x0101000000000000000000F03F000000000000F03F
is equivalent to
Point(1 1)

Presumably you are looking at:

http://dev.mysql.com/doc/mysql/en/gis-wkb-format.html

Which also says:

The Well-Known Binary (WKB) representation for geometric values is
defined by the OpenGIS specifications. It is also defined in the ISO
"SQL/MM Part 3: Spatial" standard.

A pointer to that document can be found here:

http://dev.mysql.com/doc/mysql/en/gis-introduction.html

Which indicates that the GIS spec is here:

http://www.opengis.org/docs/99-049.pdf

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Paul DuBois, MySQL Documentation Team
Madison, Wisconsin, USA
MySQL AB, www.mysql.com

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