<p><strong>Abstract.</strong> A partial participatory GIS approach was implemented in a community in La Paz, Baja California Sur, Mexico to reduce vulnerability of floods caused by cyclones. A workshop was held to locate areas susceptible to floods, and understand measures already taken by the community as well as actions proposed towards vulnerability reduction. We used printed high-resolution satellite images and generative tools to gather data of workshops attendees. Then all information was transferred into a GIS. In addition, we conducted a survey to collect socioeconomic and adaptation data on 490 households (each one identified and spatially located). We analyzed through “chi square” and “gamma tests” the relationship between survey data and houses affected by floods. The map generated was reviewed by risk management experts and used as an input for map validation/refinement from the workshop. The final map was returned to the community and used as an instrument for communication, negotiation, risk management and vulnerability reduction, making spatially explicit areas affected by floods and proposed measures to reduce vulnerability. Despite not finding a statistical (co-relation) between the participants education and socio-economic levels or preparedness for risk and the affectations (impacts) by floods. The majority of people showed to be used to local knowledge preventive measures in their household under a cyclone alert and answered to feel prepared to a cyclone arrival. This cyclone awareness could be explained since in this community 40&thinsp;% of the people had at least 12 years of education. Which is relatively high for a developing country as Mexico where the average of years of study is 9.1. Besides 87&thinsp;% of the people get a medium to high value in a socioeconomic index created in this study.</p>
El propósito de este artículo es analizar, a través de un ejercicio cuantitativo, algunos aspectos de la morfología urbana de las 59 zonas metropolitanas de México para el año 2010. Se miden siete indicadores importantes para el debate actual, relacionados con el crecimiento extensivo y disperso de las ciudades, así como con la proliferación de estructuras urbanas policéntricas. Los resultados muestran una heterogeneidad enorme. Además, se identifican tres grandes dimensiones morfológicas que son independientes entre sí: una que funciona a escala local vinculada con la traza urbana, y dos más de escala metropolitana sobre la macroforma y la distribución de las actividades.
La producción científica y la política territorial en México se ha construido básicamente a partir de la dicotomía campo-ciudad. En consecuencia, los fenómenos periurbanos no han sido cla-ramente explicados y, las políticas dirigidas a estos espacios no son explícitas o diferenciadas. En ese sentido, este artículo busca aportar información panorámica del periurbano en México. Primeramente, se propone un método para la identificación del periurbano basado en el índice de entropía de Shannon que mide la heterogeneidad del uso del suelo. En un segundo tiempo, el estudio caracteriza el espacio periurbano a través de atributos demográficos, sociales y terri-toriales. Finalmente, el estudio identifica cuatro dimensiones sociodemográficas y territoriales del espacio periurbano: 1) polarización socio-ocupacional, 2) la oposición entre suelo natural y suelo para el cultivo, 3) urbanización como entorno construido y dinámica demográfica, y 4) marginación social e informalidad residencial. Estas dimensiones sugieren procesos simultáneos diferenciados en el espacio periurbano.
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