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Change detection Methodolgy
By renumadhu,
Hello All,
I am working on change detection of river morphology using UAV images. Could anyone tell me what methodology can i follow to detect the changes in channel shifting. Image differencing is not enough according to the feedback i have recieved from my seniors. They want the image to be classified and then detect the changes based on them.Can some one help?
Thank you,
Renu.
Cloud masking from landsat image
By w1malik,
In ArcGIS there is no direct way to mask the clouds. However one can use model in model builder with various tools to mask the clouds. One such idea is - Add new field to cloud polygon attribute table with -9999, Convert polygon to raster using -9999 field, Use conditional statement to get new raster which is cloud masked raster with cloud value -9999, Use set null tool to set remove cloud part.
i have the problem that how to use conditional statement to get new raster and set null value...
An
GIS Career with a BBA
By schaferr3,
Hello all,
I just graduated from a four year university with a BBA in Management (4.0 gpa) and I am 22 years old. I have always been very interested in maps and data since a young age. I knew I wanted to do GIS last year but I figured I might as well finish my BBA since I was so far in.
My question is there any chance I could land a GIS job with a company without having a specific degree in that field? I have been working full time at a State Police agency doing administrative work fo
Exclude bands from supervised classification?
By 30000,
Hi, I'm trying to perform some wetland supervised classification, and I am getting quite a bit of spectral confusion, with overlapping and incorrect classes. I am using ERDAS 2014 and Landsat 8 imagery. When evaluating the training classes, some of the bands show quite distinct and separate histograms, while in other bands the histograms interfere with each other. Is there a way to only use some of the bands to classify certain training sites?
The only way I have seen so far is to create a s
About digital number, linear stretching and vegetation indices
By emani,
Does the value of digital number change after linear stretching? And is it fine to obtain vegetation indices from linerly stretched images?
Thanks
Emani
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