Rozpoznanie form pokrycia i użytkowania ziemi na zdjęciu satelitarnym Landsat ETM+ metodą klasyfikacji obiektowej

• Autorzy: Lewiński S.

Warianty tytułu

EN

Identification of land cover and land use forms on landsat ETM+ satellite image using the method of object-oriented classification

• Języki publikacji: PL

Abstrakty

EN

The results of object-oriented classification based on multispectral and panchromatic Landsat ETM+ data, conducted with the use of eCognition software, are presented in the paper. The classification image was prepared using an algorithm aimed at obtaining a database similar to the one resulting from traditional visual interpretation. After the classification, generalisation of data was performed using a working unit of 1 ha for built-up areas and 4 ha for the remaining classes. Next, raster to vector conversion was performed and the edges of objects delineations were smoothed. Verification using a method of visual interpretation was the last stage of works. After combining the verification results with the classification, the final database was obtained. The applied methods of classification enabled identification of 18 land cover and land use classes, at least four of which cannot be identified using traditional methods. The obtained total accuracy of classification reached 94%. The principles of segmentation of the Landsat ETM+ image based on the panchromatic channel and fused multispectral and panchromatic data are specified in the paper. Fusion was based on PanSharp algorithm within PCI Geomatica software, which preserves spectral characteristics of the original data. The adopted principles of land use and land cover classes were also described. What is particularly worth attention is the method of identification of four built-up land classes, which were extracted from the general class of built-up areas classified using the nearest neighbour method. This task involved use of a parameter defined as a square root of the sum of squares of differences between spectral values of particular channels, while the classification of shadows of buildings was used for identification of built-up areas with apartment blocks. The presented method of classification and processing of the obtained results can support or, in certain cases, entirely replace traditional visual interpretation of satellite images, aimed at creating a land cover and land use database.

Słowa kluczowe

PL

użytkowanie ziemi; pokrycie terenu; Lansat ETM+

EN

object oriented classification; land use; land cover; Landsat ETM+

• Wydawca: Polskie Towarzystwo Informacji Przestrzennej
• Czasopismo: Roczniki Geomatyki
• Rocznik: 2006
• Tom: T. 4, z. 3
• Strony: 139--150
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Lewiński S.

• Instytut Geodezji i Kartografii,

Bibliografia

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