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Hello, I've been looking into ways of automated mapping of drainage ditches from a DEM (The straight line features in the attachment). I've been getting some decent results using the Hydrology tools in the Spatial Analyst extension. What i was hoping for some help with is if someone knows any other way to do this using the DEM? Another thing i would like to try is to somehow automatically calculate the widths and/or depths of the drainage ditches. Any ideas? I've been looking into creating cross sections but was wondering if there was another way that I'm not aware of? Thanks for any help.
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10-10-2013
02:31 AM
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Okay so I figured out the interactive supervised classification problem. I'm just too impatient. However I'm not sure why I can't create .gsg files.
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07-25-2013
06:10 AM
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Hello i've been trying to get carry out Interactive Supervised Classification using the image classification tool bar but can't get it to work. I was wondering if their is anyway to tell if it is working or not? Arc just seems to freeze up and I can't tell if it is doing anything. I've also tried to make some .gsg files from my training samples. I've been trying to save the .gsg file in my directory but when I look there is nothing there. Any ideas? Thanks for any help.
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07-25-2013
02:40 AM
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Hello, I was wondering how to create some custom symbols similar to the ones in the Forestry Style reference. Alternatively if anyone knows of style references with greater choice of tree and vegetation symbols then that would be great. Are there any freely available online? I'm really looking for a symbol to represent mixed woodland but a greater choice of forest/vegetation symbols would be great. Thanks for any help
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07-12-2013
06:16 AM
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Thanks jbswain that link contains a wealth of information. I managed to extract band 1 from the CIR image. I'm assuming this is the correct one. Many thanks. I have another question but I will create a new thread
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07-05-2013
06:45 AM
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I forgot to say when I zoom right in it shows the checkerboard show however it displays fine when zoomed out.
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06-24-2013
07:47 AM
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It looks fine in ArcMap. That's why I wasn't sure why it wasn't working. I set it to generate overviews in the Mosaic Dataset. I'll generate them again and see what happens. Thanks for your help.
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06-24-2013
07:45 AM
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Hello, I've produced a map with a mosaic dataset of aerial images. The problem is now I've tried to convert it to a .jpg to print is that instead of displaying the aerial images I get a kind of checked black and white pattern where the imagery should be. Any idea whats wrong?
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06-24-2013
01:18 AM
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Awesome thanks Cartographer I'll give that a go! 10.1 btw
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06-21-2013
07:45 AM
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