论文信息 - Retrieving urban areas on Google Earth images: application to towns of West Africa

Retrieving urban areas on Google Earth images: application to towns of West Africa

This article presents original stepwise image processing providing spatial delimitation of urban areas from Google Earth images in West Africa. In such images, converted to grey level images, urban areas are distinguished from their surroundings thanks to a specific textural aspect that may be retrieved by means of relevant morphological filters. Extraction of urban patterns consists of image analysis based on methods of mathematical morphology. The morphological filters used in the stepwise processing are chosen according to the spatial resolution, the visual quality of the original images and the environmental characteristics of the towns under study. Results are then compared with spatial data provided by a public geographical database.

[1] Catherine Mering,et al. Analysis of built-up areas extension on the Petite Côte region (Senegal) by remote sensing , 2003 .

[2] Akila Kemmouche,et al. Macro-texture mapping from satellite images by morphological granulometries: Application to vegetation density mapping in arid and semi-arid areas , 2004 .

[3] Catherine Mering,et al. Radar Image Analysis Using Morphological Filters , 1994, ISMM.

[4] Akila Kemmouche,et al. Analysis and Mapping of Natural Landscapes from Satellite Images Using Morphological Filters , 1996 .

[5] Catherine Mering,et al. GRANULOMETRIC MAPS FROM HIGH RESOLUTION SATELLITE IMAGES , 2011 .

[6] P. Longley,et al. Measuring urban morphology using remotely-sensed imagery , 2000 .

[7] P. Haggett. Locational analysis in human geography , 1967 .

[8] Yann Callot,et al. Image-analysis and cartography of sand hill massifs on high resolution images: application to the Great Western Erg (NW of Algerian Sahara) , 1994 .