The next step for our urban areas is to become friendly using open data. The focus of this paper is to highlight the necessity and the implementation of Open Government Data (OGD). It also presents the principles of Open Government Data. The paper aims to analyze the OGD solutions and the impact of these for urban development using a SWOT analysis. In our age OGD confers an important advantage in development economy. In this case everybody tries to implement efficient OGD.Keywords: Open Data, Open Government Data, Smart Cities, Friendly Cities, Knowledge EconomyIntroductionThe paper aims to analyze the impact and the role of open government data in our society and to highlight the trend of European countries in this case.The first part presents the literature review of the open data and open government data. Researchers worldwide are interested in improving governmental activity by implementing the latest innovations to the knowledge economy. The free exchange of ideas, information and knowledge is the support of development [14]. Open data is an essential element for knowledge economy. Knowledge economy emphasizes with lifelong learning, good quality of life and open government data.The second part highlights the opportunities and the changes that will be made in society after will implement an OGD solution. It is essential to the governmental and the citizens to use open data because this will offer independence, transparency, decentralization and, in the same time, aggregation.The third and the fourth part of the paper present the impact and the barriers of open government data. It is very important to highlight the benefits, disadvantages and barriers. These can be presented start from the most important cities how use this kind of solutions.In the fifth part is presented a classification of cities in three main categories based on the usage of open government data and a SWOT analysis about OGD solutions.The paper ends with the conclusion and the most important idea is: for development urban areas we have to use open government data.2 Literature ReviewThe literature review [1], [2], [3] highlight that a group inspired by open source software movements published version 1.0 of a statement they called the Open Knowledge Definition (OKF - Open Knowledge Foundation, 2006). This puts forward a definition of what it means to have open content, stating that: A piece of data or content is open if anyone is free to use, reuse, and redistribute it - subject only, at most, to the requirement to attribute and/or sharealike [6], [7], [8].In our age we can increasing the efficiency of public services and governmental activities by fast adopting the new technologies and the open data solutions.The most recent and important point of view is use of open data solutions is the Europe 2020 Strategy [18], [22], [23]. This strategy try to put the Europe's economy back on the path to growth.The Europe 2020 Strategy promotes the strategic objectives of a smart, sustainable and inclusive growth which are made further operational by a number of five headline targets for 2020 and by seven flagship initiatives.The Europe 2020 Strategy identifies five headlines that European Union should take to boost growth and employment. These are presented in Figure 1.The Europe 2020 Strategy has important direct implications for the future EU Cohesion Policy, because it develops - in fact - the same strategies for the period 2014- 2020. The Europe 2020 Strategy identifies seven flagship initiatives. These flagship initiatives [18], [23] are (Figure 2):· Innovation Union: the most important aspect is to improve framework conditions for better finance of research and innovation;· youth on the move : to reinforce the education systems and to improve the international view of Europe's higher education;· a digital agenda for Europe: the accent is put on the development of high-speed internet and to use the benefits of the one digital market;· resource efficient Europe: to use efficiently the resources for economic growth, increasing the use of renewable sources, improve and modernizing the transport sector and reduce of energy consume;· an industrial policy for the globalization era: the most important objectives are to improve the business environment and to development of a strong and sustainable industrial base able to compete globally. …