Abstract. Land-use planners often make complex decisions within a short period of time when they must take into account sustainable development and economic competitiveness. A set of land-use suitability maps would be very useful in this respect. Ideally, these maps should incorporate complex criteria integrating several stakeholders' points of view. To illustrate the feasibility of this approach, a land suitability map for housing was realised for a small region of Switzerland. Geographical Information System technology was used to assess the criteria requested to de ne the suitability of land for housing. An example dealing with the evaluation of noise levels illustrates the initial steps of this procedure. Because the required criteria are heterogeneous and measured on various scales, an outranking multicriteria analysis method called ELECTRE-TRI was used. However, using it to assess the suitability of any point in a territory was impractical due to computational limitations. Therefore, a mathematical function to evaluate closeness relationships and classify the study area into homogeneous zones was used. This function is compatible with the outranking function of ELECTRE-TRI used to assess the suitability index. The resulting maps lend e cient support to negotiation and are very useful in dealing with inherent con icts in land-use planning.

In land management, conflicts are more frequent and stronger. Any important project on land becomes difficult to implement. MAGISTER (Multicriteria Analysis with GIS for TERritory) model proposes a decision support method to integrate multiple actors of land management. It is based on geographical information systems and multicriteria analysis. In land use problems, the study area is described by a set of homogeneous zones to reduce the numbers of alternatives. The homogeneity quality is assessed by use of a valued closeness relation developed in the domain of rough set theory. This function is based on the same principle as the valued outranking relation used in ELECTRE, which is then used to select the best zones, or classify them in predefined category. One application of the MAGISTER model concerns the realisation of a land suitability map for housing. Through eight criteria, this map integrates simultaneously the particularity of each place and the general principles of land management, which should be determined by decision‐makers.

Involving a wide-range of stakeholders at different moments in the planning of urban adaptation to climate change can help to overcome different barriers to adaptation, such as a lack of common perception, or control over options. This Article argues for an approach that involves a wide range of actors throughout the planning process in order to confront the challenges of urban adaptation to climate change. It builds on the results of a three-year participatory action research project to identify the catalysts with which local administrations can overcome the lack of data, the low level of engagement around the climate issue, and the cause-and-effect linkages of climate change impacts on the urban environment. Significant factors include territorial rootedness, leveraging actors' experience, interaction between actors, as well as the valuing of local actors as experts of territorial management rather than as novices with regard to climate change adaptation. In addition to contributing towards the engagement of a large number of stakeholders around adaptation issues, a planning process that involves representatives from various sectors and during several stages contributes to a greater understanding of these issues and their linkages. It follows that such a process will bring changes to urban practices by better articulating local concerns about climatic issues. Policy relevanceAlthough participation is commonly advocated in policy responses to climate change, only few empirical studies have investigated the ways in which local actors' knowledge can be integrated into climate change adaptation planning processes. The article builds on the results of an action research project carried out in Québec City, Canada, to address the relevance of involving a progressively broader range of actors as the adaptation process moves through its various phases. Given that a multitude of barriers to adaptation are at play at different times in a municipality, collaborations between local stakeholders emerge as a key factor. These collaborations provide greater insight into the linkages between climate change impacts and the urban environment and, in doing so, bring into question ordinary urban management and design practices.

Les premières banlieues pavillonnaires nord-américaines sont problématiques pour le vieillissementà domicile. Malgré la dépendanceà l'automobile, les banlieusardsâgés aspirentà y vieillir. Plutôt que de déménager, ils adaptent leur quotidien et leurs déplacements. L'accèsà la mobilité est un enjeu majeur au maintien d'une expérience résidentielle positive, notamment pour les individus en perte d'autonomie. Or, parce qu'elle estétudiée avec le concept de déplacement, la mobilité des aînés demeure mal comprise en tant qu'expérience individuelle et collective. C'est dans cette optique que les pratiques et les significations de la mobilité quotidienne de 87 banlieusardsâgés de 55à 82 ans de l'agglomération de Québec au Canada sont icí etudiées. En croisant des méthodes quantitative et qualitative ainsi que des techniques d'analysesDaily mobility of aging and elderly suburbanites: trips, aspirations and meanings of mobilityThe post-War suburbs of North America are problematic for aging in place. Despite their high level of car dependency, elderly suburbanites would rather grow old at home. Rather than move, they make changes to their daily routines. Gaining access to mobility is a major issue for older people, particularly frail seniors, who wish to ensure that their residential experience remains positive. Given that the study of mobility draws on the concept of trip patterns, our understanding of the individual and collective experiences of elderly mobility is incomplete. In this light, this paper explores the practices and meanings of daily mobility for 87 elderly suburbanites aged from 55 to 82 years and currently residing in the greater Québec City area, [Cet article aété soumis avant que Marius Thériault devienne rédacteur pour les textes en français et le processus de révision á eté entièrement réalisé par Rodolphe Devillers./ This manuscript was submitted before Marius Thériault became French editor and the review process was entirely managed by Rodolphe Devillers.] The Canadian Geographer / Le Géographe canadien 53, no 3 (2009) 357-375 C / Canadian Association of Geographers / L'Association canadienne des géographes 358 Sébastien Lord, Florent Joerin and Marius Thériaultspatiales, l'article développe une typologie de mobilité pour explorer les stratégies d'adaptation des aînésà leur environnement socio-spatial. Les résultats montrent que, sans véritablement entrer dans un processus de décision, les banlieusards choisissent implicitement de vieillir en banlieue en adaptant de manière continue leurs modes de vie. La conservation de l'indépendance et l'attachement au «mode de vie banlieusard» sontà la source des aspirations résidentielles. Cette mobilité quotidienne en transformation risque aussi d'influencer les trajectoires résidentielles, alimentant les réflexions sur la requalification de ces milieux vieillissants.Mots clés: vieillissement, mobilité quotidienne, mobilité résidentielle, banlieue, méthode qualitative, méthode quantitative, analyse spatiale Canada. Combining both quantitative and qualitative me...