Introduction
Mosaic of Images
The mosaic imageries on Google Earth™, shown on this picture were of various regions of Burma’s Ayeyarwaddy delta. The yellow dash-lines show the boundaries of scenes with different colors and tones. Darker colors of the images could be misled in the interpretation of the same features as two different items.
The sites below show various regions of the Burma’s Ayeyarwaddy delta. Each photo shows the differences in color on the images posted on Google Earth™ (GE). A general boundary line was drawn on each picture distinguishing the areas where two different photos merged in a mosaic. The imageries posted on GE has been provided mostly by various satellite companies such as Digital Globe, GeoEye, TerraMetrics, Europa Technologies and Image NASA. The differences in colors on images could be due to the differences in atmospheric conditions, the look angle between the different images, the contrast stretch used by the provider, and the pan sharpening algorithms. (Dr. Jim Ellis of Ellis-Geospatial) The color-balancing could be done for each scene and minimized the differences while mosaicking, but it will be costly. The images made available on GE must have been used with readily available pan sharpened scenes with difference colors and tones. Therefore, the users of these imageries on GE should be aware of color differences in identifying agricultural features during the digitizing exercises for Myanmar Paddy Project. Especially, some features on the images could be misled by green, brown and dark colors. The images were made in summer of 2008, however, the images could have taken on different months of summer.
Shapes and Patterns of Agricultural Lands
Agricultural Lands in Summer
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re-established and posted on September 25, 2011 by winnerscircle.
re-established and posted on September 25, 2011 by winnerscircle.