title: Difference between multipolygon and polygon in PostGIS
body: <p>What is the difference between <code>point</code> and <code>multipoint</code> ? <code>linestring</code> and <code>multilinestring</code> ? <code>polygon</code> and <code>multipolygon</code> ? In PostGIS</p>
  
  <p>What is the secret behind defining "Multi" shapes?</p>