Geophysics and Energy at the University of Lisbon. He holds a diploma in Geographical Engineering from the University of Lisbon (1994)

EarthzineArticles, Earth Observation, Original, Sections, Themed Articles, Urban Monitoring Theme

Map showing the location of Peddavagu basin, a tributary of Krishna River basin

Figure showing Map updated to 2006 showing the type of changes occurring in the study area.The routine updating of municipal maps at 10-year intervals cannot keep pace with modern urban dynamics. The GeoSat project steps into this breach to demonstrate how city planners and managers can use remote sensing to develop new information, incorporate it into existing maps and apply the results across a range of municipal tasks.

Understanding the Drivers and Consequences of Global Urbanization using Emerging Remote Sensing Technologies

EarthzineArticles, Earth Observation, Original, Sections, Themed Articles, Urban Monitoring Theme

Photo showing a bunch of hands holding up the earth. Photo: Gandee Vasan/Getty Images

urban growth workshops at Arizona State University logoIs urban remote sensing really useful to local planners? Does the research community understand which applications, scales and data are most relevant and sought after? These and other questions were addressed in a recent workshop organized by the Geography Department at the Arizona State University.

Can Cities Create Their Own Snowfall? What Observations are required to find out?

EarthzineArticles, Earth Observation, Original, Sections, Themed Articles, Urban Monitoring Theme, Weather

Map showing the location of Peddavagu basin, a tributary of Krishna River basin

cropped image of lidar image of dodge cityIf you do not think human activities can create or alter snowfall patterns, then consider the events of Jan. 19, 2011 in Dodge City, Kansas. The National Weather Service documented an unusual weather pattern that caused a very narrow band of snow downwind of Dodge City. The NWS website states that ‰ÛÏthe atmosphere was cold and moist with low clouds and fog preceding the formation of the snow.

Population Estimates in Informal Settlements Using Object-Based Image Analysis and 3D Modeling

EarthzineArticles, Earth Observation, Original, Sections, Themed Articles, Urban Monitoring Theme

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Cropped image showing Object-based classification of urban land cover in the Rio das Pedras squatter settlement, conducted at Level 1 of the semantic network.The proliferation of multistory residential buildings with high occupation densities in the cities of developing countries poses serious challenges to our ability to estimate populations, particularly in squatter settlements where conducting surveys may pose a safety risk to field workers. An innovative method applying both 2D and 3D information derived from digital elevation models obtained by orbital very high resolution images demonstrates that remotely sensed data can provide fast and fairly accurate results that can be updated continuously in the inter-census periods.

Remote Sensing – An Effective Data Source for Urban Monitoring

EarthzineArticles, Earth Observation, In-Depth, Original, Urban Monitoring Theme

3D city model of the coastal city of Padang, Indonesia. Source: DLR-DFD

H. Taubenböck and T. Esch German Remote Sensing Data Center (DFD), German Aerospace Center (DLR), 82234 Wessling-Oberpfaffenhofen, Germany hannes.taubenboeck@dlr.de Abstract — Urban monitoring implies multi-temporal observation and measurement of transformations or consistencies within cities. The urban context is highly complex, as cities consist of a large number of people living in close proximity and conditions of relative density and diversity … Read More

Temporal Characteristics of Thermal Satellite Sensors for Urban Heat Island Analysis

EarthzineArticles, Earth Observation, In-Depth, Original, Sections, Themed Articles, Urban Monitoring Theme

Figure showing Air temperature (Ta) for the Hong Kong Observatory (urban) and Ta Kwu Ling (rural) climate stations for the 48 hours surrounding the image time.

Figure showing Air temperature image of the Kowloon Peninsula with street network.How accurate are thermal satellite images compared to on-the-ground field measurements when it comes to assessing the urban heat island (UHI) effect in Hong Kong? This research suggests that thermal images can be useful on hot summer nights to evaluate the magnitude and distribution of Hong Kong’s UHI.