This is an example of free and open source software integration that consists of a geographical application called Tras-Mi-SIG to query and visualize routes in a network of public transport composed by stations and segments.

The English version of the document can be downloaded here. (Thanks to dianatg)

Con el ánimo de construir mi propio visor de datos espaciales en formato vectorial, me di a la tarea de buscar herramientas de software que me lo permitieran de la manera más libre posible.