The 2007/2/CE INSPIRE directive requires every Member State to implement a set of services to
facilitate the interchange of spatial data; the Coordinate Transformation Service (CTS) is one of
the geometric transformation services required by the directive. The Italian National Geoportal
(GN) has recently published a new set of public access services that enable the users to transform
and convert the coordinate reference system of geographic data within the Italian territory using
the high-accuracy correction data provided by the Istituto Geografico Militare Italiano (IGM).
This article will illustrate these newly published services: a browser-based web application to
transform raster and vector files or sets of coordinates and an OGC-compliant Web Coordinate
Transformation Service (WCTS) that performs on the fly transformation of GML (Geography
Markup Language) data
