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+/*! \page vlibPg GRASS-PostGIS data provider
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+
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+by GRASS Development Team (http://grass.osgeo.org)
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+
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+\tableofcontents
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+
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+\section vlibPgInro Introduction
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+
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+<b>GRASS-PostGIS data provider</b> allows GRASS vector library to read and
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+write PostGIS data directly without any external library (like in the
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+case of \ref vlibOgr). GRASS-PostGIS data provider is implemented
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+using <a
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+href="http://www.postgresql.org/docs/9.2/static/libpq.html">libpq
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+library</a>.
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+
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+Note that GRASS-PostGIS data provider is compiled only when GRASS is
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+configured with <tt>--with-postgres</tt> switch.
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+
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+See the <a
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+href="http://trac.osgeo.org/grass/wiki/Grass7/VectorLib/PostGISInterface">trac
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+page</a> for more info.
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+
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+\section vlibFn List of functions
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+
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+Note that the functions listed bellow are lower level subroutines, in
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+other word these functions are not consider for usage. They are
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+internally used by the vector library when accessing PostGIS data. The
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+programmer should use higher level functions instead.
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+
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+- Vect_open_old() to open exising vector map (ie. PostGIS table when using GRASS-PostGIS data provider)
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+- Vect_open_new() to create new vector map
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+- Vect_close() to close vector map
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+
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+- Vect_rewind() to rewind the map for sequential access
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+- Vect_read_next_line() for sequential access
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+- Vect_read_line() for random access
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+
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+- Vect_write_line() to write a new feature
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+- Vect_delete_line() to delete existing feature
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+- Vect_rewrite_line() to modify exising feature
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+
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+- Vect_build() to build (pseudo-)topology
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+
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+Note that functions with <tt>V1_</tt> prefix access vector data
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+without topology. Topological (pseudo-topological for simple features)
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+access is provided by functions starting with <tt>V2_</tt> prefix.
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+
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+\par Open/Create PostGIS table as GRASS vector map
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+
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+- V1_open_old_pg()
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+- V2_open_old_pg()
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+
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+- V1_open_new_pg()
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+- V2_open_new_pg()
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+
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+- V1_close_pg()
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+- V2_close_pg()
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+
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+\par Read feature from PostGIS table
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+
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+- V1_rewind_pg()
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+- V2_rewind_pg()
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+
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+- V1_read_next_line_pg()
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+- V2_read_next_line_pg()
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+
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+- V1_read_line_pg()
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+- V2_read_line_sfa()
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+- V2_read_line_pg()
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+
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+\par Write new feature to PostGIS table
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+
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+- V1_write_line_pg()
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+- V2_write_line_sfa()
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+- V2_write_line_pg()
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+
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+\par Delete exising feature from PostGIS table
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+
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+- V1_delete_line_pg()
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+- V2_delete_line_sfa()
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+
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+\par Modify existing feature from PostGIS table
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+
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+- V1_rewrite_line_pg()
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+- V2_rewrite_line_sfa()
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+
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+\par Build topology
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+
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+- Vect_open_topo_pg()
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+- Vect__build_sfa()
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+- Vect_build_pg()
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+
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+\section vlibPgSeeAlso See Also
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+
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+ - \ref vlibOgr
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+
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+\section vlibPgAuthors Authors
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+
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+Martin Landa <landa.martin gmail.com>
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+
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+*/
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