OBJS = sscan.o sparse.o sbuffer.o vector3d.o point.o\

euler.o circle.o line.o ellipse.o polygon.o\

path.o box.o output.o gq_cache.o gist.o key.o\

crossmatch.o

crossmatch.o gnomo.o

EXTENSION = pg_sphere

DATA_built = pg_sphere--1.0.sql

DOCS = README.pg_sphere COPYRIGHT.pg_sphere

REGRESS = init tables points euler circle line ellipse poly path box index\

contains_ops contains_ops_compat bounding_box_gist

contains_ops contains_ops_compat bounding_box_gist gnomo

EXTRA_CLEAN = pg_sphere--1.0.sql$(PGS_SQL)

PGS_SQL = pgs_types.sql pgs_point.sql pgs_euler.sql pgs_circle.sql\

pgs_line.sql pgs_ellipse.sql pgs_polygon.sql pgs_path.sql\

pgs_box.sql pgs_contains_ops.sql pgs_contains_ops_compat.sql\

pgs_gist.sql pgs_crossmatch.sql\

pgs_gist.sql pgs_crossmatch.sqlgnomo.sql\

ifndef PG_CONFIG

<para>

The <function>area</function> function returns the area of a

spherical object in square radians. Supported data types are:

<type>scircle</type>, <type>spolygon</type>, and

<type>sbox</type>.

<type>scircle</type>, <type>spolygon</type> (if the polygon

is convex), and <type>sbox</type>.

</para>

<example>

<title>Area of a spherical circle as a multiple of &pgr;</title>