Inside

OGC Definition

There is none.

Oracle Spatial Definition

[OSUGR] defines Inside as follows. "The opposite of CONTAINS. A INSIDE B implies B CONTAINS A. See Contains . The FDO Oracle Provider implements Inside using the inside spatial operator.

inside = inside as used in the third argument to the sdo_relate spatial operator, for example,
sdo_relate(a.GEOMETRY, MDSYS.SDO_GEOMETRY(2002, NULL, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1,2,1), MDSYS.SDO_ORDINATE_ARRAY(1,1, 6,1)), 'mask=inside')

PHP Code Implementation

The equivalent of the Inside predicate can be expressed using MgGeometry methods as follows.

<?php
function Inside ($geom1, $geom2) {
   $withinBool = $geom1->Within($geom2);
   if (!$withinBool) return $withinBool;
   $boundary1 = $geom1->Boundary();
   $boundary2 = $geom2->Boundary();
   $intersectBool = $boundary1->Intersects($boundary2);
   return !$intersectBool;
}
?>

Illustration

The concentric circles represent intersecting points. a, e, g, h, and j are MultiPoint geometries.