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(added on 2009/09/21)

View from the sky 從天而看

©2009 SpatioEpi.com
Data source: NASA's LandSat 7 Thematic Mapper dated November 2005

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Satellite image provides a valuable tool for understanding the land use/land cover pattern over a large area. This image provides a snapshot of the Pearl River Delta in South China, with Hong Kong being shown in the lower right corner. In this satellite image, taken in November 2005, red indicates vegetation cover, grey indicates built-up area, dark blue indicates water and light blue indicates sediment-laden water.

人造衛星圖片是一個分析土地利用和土地覆蓋的好工具。本衛星圖片拍攝於2005年11月,圖示南中國珠江三角洲情況,右下方為香港。在近紅外線的光譜下,植被會呈現紅色,已發展的土地會呈現灰色,清澈的水體會呈現深藍色,而載有沈積物的水體則呈現淺藍色。