The open data movement is developing and has gained worldwide political relevance, resulting in a proliferation of proposals that assess the progress of open governance initiatives (OGD) in different countries. The evaluation of OGD is a subject that has been studied recently. In this study, we present a systematic mapping study to show the scopes, instrument, methods and political, technical and organizational dimensions that assess the OGD. The analysis reviewed studies published in SCOPUS between 2009 and 2018. We found that the scope of the 30 studies focuses on the evaluation of the implementation. Similarly, the main type of evaluation is the application of the initiatives, through Frameworks and indicators, in the political and technical dimensions. The above shows that it is possible to approach the evaluation of the preparation of the OGD as future work, as an instrument that supports public entities in identifying capabilities to implement an OGD program.