Abstract
Abstract. Bucharest, capital of Romania, deals with serious difficulties as a result of urban politics: influx of people due to industrialization and development of dormitory areas, lack of a modern infrastructure, absence of coherent and long term urban development politics, continuous depletion of environment. This paper presents a multisensor study relying on multiple data sets, both analogical and digital: satellite images (Corona – 1964 panchromatic, SPOT HRV – 1994 multispctral and panchromatic, IKONOS – 2007 multispectral), aerial photographs – 1994, complementary products (topographic and thematic maps). Georeferenced basis needs to be generated to highlight changes detection. The digital elevation model is generated from aerial photography 1:5,000 scaled, acquired in 1994. First a height correction is required followed by an affine transformation to the ground control points identified both in aerial photographs and IKONOS image. SPOT-HRV pansharpened satellite image has been rectified on georeferenced IKONOS image, by an affine transformation method. The Corona panoramic negative film was scanned and rubber sheeting method is used for rectification. The first 25 years of the study period (1964–1989) are characterized by growth of industrial areas, high density apartment buildings residential areas and leisure green areas by demolition of cultural heritage areas (hundred years old churches and architectural monuments). Changes between the imagery were determined partially through visual interpretation, using elements such as location, size, shape, shadow, tone, texture, and pattern (Corona image), partially using unsupervised classification (SPOT HRV and IKONOS). The second period of 18 years (1989–2007) highlighted considerable growth of residential areas in the city neighborhood, simultaneously with the diminish of green areas and massive deforestation in confiscated areas before and returned to the original owners.
Highlights
A new-comer in the European Union, Bucharest, capital of Romania, deals with serious difficulties as a result of urban politics prior and after 1989: influx of people due to industrialization and development of dormitory areas, lack of a modern infrastructure, absence of coherent and long term urban development politics, continuous depletion of environment
The high resolution Corona image scanned with care, provides high levels of detail on ground features
In this case threedimensional information can be extracted from the CORONA imagery using only a small number of ground control points (GCPs)
Summary
A new-comer in the European Union, Bucharest, capital of Romania, deals with serious difficulties as a result of urban politics prior and after 1989: influx of people due to industrialization and development of dormitory areas (approximately 80% of the inhabitants live in apartment buildings), lack of a modern infrastructure, absence of coherent and long term urban development politics, continuous depletion of environment. This research monitored the following urban development and ecological comfort parameters: dynamics of high density residential areas, in close connection with conversion of arable land outside city to inner urban perimeter, road infrastructure evolution, industrial areas evolution, leisure green areas evolution, water areas evolution (Blakely et al, 2002). Due to their specific techniques for data recording and analysis, photogrammetry and especially remote sensing are exquisite means in change detection in urban and peri-urban areas
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