Urban sprawl, 2011 theme

The demographic theme will be in fashion this year -And the following- because there is not much to do to tackle solutions globally. This year's focus for National Geographics is precisely the world population on the eve of adjusting the 7 billion. The January edition is a classic collection.


The Lincoln Institute of Territorial Policies has prepared several theses and research materials that come from one more study of 3,000 cities that exceeded the 2000 inhabitants in the 100,000 year.

The publication that I liked the most is the document called urban planificationMaking space for a planet of cities. An interesting report that analyzes the past, present and future of urban growth worldwide. It proposes a new paradigm of how we should prepare for growth in the coming years.
Great job of Angel, Shlomo, with Jason Parent, Daniel L. Civco, and Alejandro M. Blei. You can buy it in a printed version for US $ 15 and download in pdf format for free (you only have to be registered on the page). For the 2012 year, the publication of a material called The Expansion of Cities, Which will surely be an interesting proposal that should include the models of the Charter Cities, that reminds me of the principles of Facebook's CitiVilles and that it is dangerous to create new political crises because although it is an extremely interesting proposal, many see it as a new form of colonialism.

Another content of the Lincoln Institute, always in this subject is The urban expansion atlas. This is an invaluable collection of information available for download that contains maps in image format, kml and xls sheets that served as the basis for the construction of the -and other- document mentioned above. There is also data in GIS format to be read from a GIS program.

This is organized into five sections:

1 The first part, there are jpg images in the form of pairs diagrammed as to print on posters. One image contains statistical data and graphics, the other maps of urban land use constructed with remote sensing techniques with satellite images in metropolitan areas of 120 cities in two periods: One taken close to the 1990 year and the second in 10 years later in the 2000.

The upper map shows the location of the 120 cities, the colors are the regions as the study is divided. As an example I leave the pair of Madrid.

2000-madrid-map 2000-madrid

2 The second part Includes a population-based historical growth study of 25 cities, analyzing maps from 1800 at the end of the recently completed century. These 25 cities are distributed, as shown in the following map: 7 in America, 4 in Europe, 6 in Africa, 12 in Asia and 1 in Oceania.


The lower images are an example of the case of the metropolitan area of ​​Mexico. On the left the areas covered by the urbanized zone from 1807 to the 2000, and on the right are the population data, covered hectares, density graphs and a representative old map.

Historical-mexico-city-map Historical-mexico-city

3. The third section It includes tables in Excel with all the data that supports the work of the 15 and 120 cities. Exceptional, since Excel filters allow us to see this data according to our interests.

4 The fourth section includes the data to be displayed in GIS programs. Both geometries of administrative regions with layers .shp .dbf and .shx to see with any program, as well as .prj files for georeferencing, .img for raster and .lyr deployment to see the layer with theming properties and structure in ArcGIS.

5 The fifth section It includes the information of the 3,646 cities in an Excel sheet and also in a kml file with all the urban areas studied, to visualize it with a GIS program or Google Earth.

In short, a valuable material that can be very useful for students, public officials, researchers, planners and people involved in socio-economic development.

Both the atlas and the document provide a conceptual framework and, it seems for the first time, the empirical data of the past, present and future dimensions of urban areas of cities around the world. It opens the perspective of a challenge that we do not know how to address in the following decades.

For now I do not see if it is possible to buy it on a CD or DVD, as the download must be done individually.

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