Rating criteria of the VGI quality on the examples of odour immission monitoring in Tarragona and the SABAP2 ornithological systemSince 2007 there has been a discussion on the quality of data gained from volunteering. The information, which is gained from the volunteers, is based on the search for new experience and is usually considered as inaccurate and incorrect. This is why the evaluation of the VGI system in various forms is introduced. In the criteria analysis of the quality of VGI the Myszczuk’s (2012) dimensions of proper functioning of the VGI, the Haklay’s (2010) VGI classification levels and the Cooper’s et al. (2012) set of the VGI quality characteristics were used, which formed the basis of the information types development and a plane for the comparative analyzes. Because of their utilitarian meaning, their goal is to raise the standards of the provided information and improvement of the developed information systems quality. Analysis of the quality of volunteering geographic information (VGI) was carried out on the example of monitoring odour immission in Tarragona and ornithological system SABAP2.