Study on urban green landscape pattern based on high resolution remote sensing image

摘要

To analyze the number of green landscape patches, their constitutive characteristic and spatial distribution in Karamay, this paper first conducted an extraction of green space information from 2012 QuickBird image of the city by means of combining object-oriented method, NDVI index and texture information together, followed by further division of the green space into six types. Finally, the method of spectrum analysis of landscape patches is applied. The result shows that, in 2012, the area of urban green space of Karamay city is 978.22ha, green space coverage is approximately 38.24%. Residential green space holds a dominant advantage over other types. Inferior are protective and attached green space. Road green space is large in patch numbers but small in the area while park green space is small in both patch numbers and the area. These conclusions can further assist urban green space management and planning in decision-making and provide data support for the analysis of water supply and demand of the city as well.