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Hi, I am working with digital globe imagery which are already georeferenced but I have a problem aligning them to other images. Even images of the same scene from the digital globe imagery don't align. I need this because am digitizing from different images every time I add a new image there is a small shift. I don't have ground control points for my study area. Robert
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04-15-2015
10:29 AM
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Dear Gabriel, Thanks so much for your detailed response. Am actually a civil engineer with very little or just basic knowledge in remote sensing and image analysis. Am actually continuing to do it manually and thankfully my professor has given me an assistant to help in the digitization. However it is really taxing to do it manually. I tried the semi-automatic classification in arcgis and as you reckon above, its difficult to create good enough spectral signatures to allow the software to differentiate some of the features hence the result is not impressive. I will continue the manual way but just in case you get other good approach kindly let me know.
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04-09-2015
09:25 AM
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Hi Tim, I have images from digitalglobe which are quite good.
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04-09-2015
08:52 AM
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Hi, Am doing my thesis and my topic concerns using digitalglobe images to identify roofs and compute their areas. I want to use this information to try and estimate the amount of rainfall that can be harvested from rooftops in Mombasa City, Kenya. I am trying to digitize the roofs manually in arcmap but the process is tidious and time consuming. I also tried the image classification tool but the results were not that impressive. How best can I extract roof areas from the raster data (images). I am working with three roof materials: Concrete, tiles and iron/steel. Any idea? Robert
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04-09-2015
04:15 AM
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Title | Kudos | Posted |
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1 | 04-09-2015 09:25 AM |
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