1. Sistemas de Información Geográfica Livro gratuito de Víctor Olaya (2014) http://volaya.github.io/libro-sigParte 1 - Fundamentos

2. Projecções Cartográficas João Catalão (2010)http://enggeoespacial.fc.ul.pt/ficheiros/apoio_aulas/elementos%20de%20cartografia_projeccoes_cartograficas.pdf
Cap. 5

3 - GIS Fundamentals, 5th Edition (Paul Bolstad)Cap. 1 - An Introduction to GIS (http://www.paulbolstad.net/5thedition/samplechaps/Chapter1_5th_small.pdfCap. 3 - Geodesy, Datums, Map Projections, and Coordinate Systems (http://www.paulbolstad.net/5thedition/samplechaps/Chapter3_5th_small.pd

4 - Georreferenciação

QGIS: http://www.qgistutorials.com/en/docs/georeferencing_basics.html
QGIS: http://docs.inasafe.org/en/training/qgis/Chapter-04-Map_Projection_Basic.html

ArcGIS: http://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/fundamentals-for-georeferencing-a-raster-dataset.htm
ArcGIS: https://cms.bsu.edu/-/media/www/departmentalcontent/library/gismaps/gismedia/georeferencing%20historic%20maps%20using%20arcgis%20desktop%2010.pdf?la=en