## 5 Discussion  
The four-step methodological approach we described and applied to the municipality of Cagliari in the previous section operationalizes the logical framework reported in Figure 1 (see Figure 4), related to the SEA process concerning the MMP of Cagliari. The spatial regression results show that the sustainability objective defined, in Figure 1, as \"Development of sustainable tourism based on attractive coastal environmental resources\", would be effectively implemented through the following operational objectives (see Table 2, coefficients and \(p\)-values):  
1. increased area of natural parks and reserves in the municipality of Cagliari, since the coefficient of variable \"H_natural_areas\" is positive and significant;
2. increased TLSs' proximity to the historic center of the municipality of Cagliari, since the coefficient of variable \"Proxy_historic_center\" is positive and significant;3. decreased TLSs' distance from the beach of the municipality of Cagliari, since the coefficient of variable \"Distance_beach\" is positive and significant.  
Planning policies whose objective is to increase the tourists' satisfaction with TLSs located in the municipality of Cagliari can be straightforwardly identified, as well, e.g., as follows:  
1. Operational objective 1 implies the implementation of policies aimed at improving protection of the municipality of Cagliari's natural resources in qualitative and quantitative terms;
2. Operational objective 2 implies policies aimed at improving the accessibility of the Cagliari's historic center, and at implementing urban renewal as breakfast facilities and so on) well, based on the restoration of residential buildings for tourist reception and hospitality (hotels, bed and within or close to the historic center; and
3. Operational objective 3 implies policies aimed at improving the accessibility of the Cagliari's beach and at increasing the supply of facilities for tourist reception and hospitality available in the vicinity of the beach.  
The results of the methodological approach based on the integration of geographic information generated by social media's users and AuGI are very effective in terms of provision of information, which may possibly increase the spatial knowledge available for planning policy definition and implementation. In this perspective, geographic information generated by social media's users discloses opportunities for building analytical scenarios related to urban and regional planning and it offers useful suggestions for sustainable development based on tourism strategies. In an integrated planning support framework, the geographic information's analytics helps understanding tourists' observations, preferences, interests, feelings, and needs, and possibly it affects decision-making dynamics and urban and regional planning processes through tourists' oriented strategies. Moreover, the potential of geographic information from social media's users to generate useful knowledge for urban and regional planning  
Figure 4: The logical framework implied by the implementation of the four-step methodology related to the SEA process concerning the MMP of Cagliari based on geographic information generated by social media’s users.  
fosters dialectics among tourists concerning locations and events by facilitating the integration of experiential and multifaceted information and expert knowledge.