A large amount of information of interest to geomatics scholars and professionals is available on the internet, however when using internet resources, one should be cautious, as most websites don't undergo peer review. You need to evaluate the website you get information from.
The following tutorials provide useful information about evaluating web sites:
University of California. Berkeley Library:
Evaluating Web Pages: Techniques to Apply & Questions to Ask
Cornell University Library:
Evaluating Web Sites: Criteria and Tools.