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Pattern Recognition of Environmental Impacts of Cities

Have been working in a new paper on patter recognition of environmental impacts of cities with pals Marcio Cataldi and Vinicius Netto. From a database containing some 40 indicators of urban environmental impact, we have performed some data mining willing to recognize the patterns. In the database there where aprox 130 cities around the globe.

We have performed basic correlation, PCAs and dendogram (between indicators and cities) analysis.

In general, we observed that the while developing demographically and economically, a city's population, individually, seem to adopt less sustainable habits, including changes in their consumption pattern. However, counter-intuitively, cities seem to become more efficient with respect to their impact as a entity, in respect to its subsystems such as water distribution and waste treatment.

I will soon post the complete paper, with more results and a explanation of the methodology.

twitter network visualization in Rio de Janeiro

Segregation has been one of the most persistent features of cities and therefore one of the main research topics in social studies. From a tradition that can be traced back to the Chicago School...

new paper in colaboration with Vinicies Netto, Maira Pinheiro e Henriqe Leite. We have collected twitter data for the city of Rio de Janeiro, recognized the presumed home location based on temporal pattern and recognized the presumed trace of each user based on the tweets produced. From this, we were able to infer income levels for each individual (based on their presumed home location) and map some 3k traces divided by income level.

This is going to be presented at the 2015 international conference on location-based social media, at University of Georgia.

Scaling Laws in Brazilian Cities

As a part of my Msc, I have been playing with brazilian data, trying to fit scaling laws, as it has been done for other cities of the world .

Brazil has a problem on the definition of city, which encompass rural areas. It was, then, necessary to exclude those cities with very little densities, once i was willing to work with functional cities (those where interactions where substantial). GDP (PIB), area and population came from IBGE and infrastructure (KM DE RUAS) came from Open Street Maps.

After pre-processing the data, I ended up finding patterns very similar to those found for other urban systems int he world:

soon i will post a paper showing the complete methodology.

#scaling laws #urban data #complex systems

Playing with tweepy+unfolding: 10-hour Twitter clound in Rio de Janeiro

Playing with Unfolding: visualizing bus GPS traces in Rio de Janeiro

#processing #unfolding #gps #bus #vizualization

Spatial Analysis on R

another open post

this time with online resources on spatial analysis using R

you can find a lot of things here and here

some more specific links:

Onde-day introductory course on Spatial Data Analysis with R

R + OSGEO

Spatial data and ggplot2

SCIENCE OF CITIES - videos

Video Archive of the SCIENCE OF CITIES (Batty, 2013)

This is an open post, I'll be linking more videos as they pop up.

Mike Batty - CASA/UCL

-TEDTalk about City 2.0, scalling and urban dynamics

-Smart Cities and Big Data

Luis Bettencourt - SFI

-Interview with Cesar Hidalgo

-Interview with Melanie Mitchell

-Interview about cities for the Radio Free Santa Fe

-Interview for the Santa Fe Radio Cafe

- Real World Applications of Cities Research, suring the SFI's Annual Science Board Symposium and Meeting Complexity: Theory and Practice

Geoffrey West - SFI

-Scaling dynamics, compared to biology and companies.

-Talk on Compass about cities as Social Networks and the genealogy of scaling studies (ther's a very simmilar Talk here)

-TEDTalk on "The surprising math of cities and corporations"

- Conceptual Framework of Urban Scaling, during the SFI's Annual Science Board Symposium and Meeting Complexity: Theory and Practice

Santa Fe Institute

-Bettencourt, Lobo and West introduce their research on cities

-Bettencourt and West for the Atlantic. With good visualizations!

Romulo Krafta - UFRGS

-On the 2nd Brazilian Journey on Urban Morphologie and Modelling, at UFPEL. (portuguese)

-and the discussion after the talk

Mandelbrot on Fractals

Mandelbrot's talk on TED about Fractals

http://www.ted.com/talks/benoit_mandelbrot_fractals_the_art_of_roughness?utm_medium=on.ted.com-facebook-share&awesm=on.ted.com_i0Ebl&utm_content=awesm-publisher&utm_source=facebook.com&utm_campaign=

Fractal geometry has appeared as an attempt to explain the geometry of natural systems, faaar away from the old regular geometry.

Some would say that the underlying dynamics generating fractal geometry are similar to those generating cities: recursiveness, bottom-up and space-filling construction. The fact is that we can measure fractal dimensions on urban geometries and relate it to some urban functions.

Mike Batty have written a book on fractal cities, available here: http://www.fractalcities.org/

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Talk do Mandelbrot no TED sobre Fractais

http://www.ted.com/talks/benoit_mandelbrot_fractals_the_art_of_roughness?utm_medium=on.ted.com-facebook-share&awesm=on.ted.com_i0Ebl&utm_content=awesm-publisher&utm_source=facebook.com&utm_campaign=

A geometria fractal nasceu como uma tentativa de expxlicar a geometria dos sistemas naturais, beeem diferente da antiga geometria regular, cartesiana.

Alguns dizem que as mesmas dinamicas fundamentais que geral a geometria fractal gera, tambem, o desenvolvimento urbano: recursividade, preenchimento de espaço e construção de baixo-pra-cima. O fato é que se pode medir dimensões fractais em geometrias urbanass e relacioná-las com funcionalidades urbanas.

Mike Batty escreveu um livro inteiro sobre isso, disponível aqui: http://www.fractalcities.org/

from Emergent City

"The Landsat program is the longest running enterprise for acquisition of satellite imagery of Earth. On July 26, 1972 the Earth Resources Technology Satellite was launched. This was eventually renamed to Landsat. The most recent, Landsat 7, was launched on April 15, 1999."

USGS - Our Earth as Art: A Landsat Perspective

http://eros.usgs.gov/imagegallery/

http://www.architectural-review.com/cubas-urban-farming-revolution-how-to-create-self-sufficient-cities/8660204.article?blocktitle=View&contentID=11445

Placemeter pedestrian counter algorithm. This kind of data is crucial for urban comprehension and planning.

Differently from most cellphone based algorithms it never identify a single person. It seems that big data and privacy can coexist.

#big data #algorithm

Great Collection of Urban Visualizations by Alexandre Pereira Santos

Explore Alexandre Pereira Santos's hand-picked collection of Pins about VISUALIZA on Pinterest. | See more about data visualization, little dragon and infographics.

Cities – ancient and modern, big and small – follow same rules of development The newest paper by Bettencourt, along with others, indicates that pre-Hispanic cities shows the same statistical regularities than those found in modern cities. In a joint effort with archaeologists, B. demonstrated that the area of the settlements of different historical periods grows with the population size according to a scale invariant relation. Even more impressive: they have found exactly the same exponents for modern cities. They say that this result suggests that the model proposed by SFI crew for the development of modern cities can be extended to every human settlement (in time and space) to see. link to the paper: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0087902

The City of 7 Billion

Promising project by Joyce Siang and Bimal Mendis from Yale School of Architecture.

"The investigators will create a holistic geospatial model of the world. They will map, spatialize and integrate multiple sets of data, including demography, finance, geography, infrastructure and resources. By comparing and correlating these different factors with population growth, this research project will analyze patterns of urbanization, determine how resources can be more efficiently allocated and anticipate the pressures and effects of development."

http://www.theatlanticcities.com/design/2013/03/what-if-entire-world-lived-1-city/4897/

by Urban Demographics

Open Street Map

8 years report

https://www.mapbox.com/osm-data-report/

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