The purpose of the module this week was to use ERDAS imagine and ArcGIS to explore band and layer data. We learn to interpret the histogram data that is located in the metadata of the image and identify features. So far out of all the labs I did find this one the most confusing. I do think I need more help figuring out how to interpret the histograms and the purpose of breakpoints. The inquire tool was something I found very useful.
I know that the lower pixel values in layer 4 mean darker. I used the inquire tool to hover over the dark areas of the image which was the water. When using this tool the file was 13, which was between 12 and 18, confirming that the water was responsible for the spike.
The small spikes in layers 1-4 around pixel value 200 would have to be a small area that is very bright. When using the inquire tool I looked for the lightest area of the image which was the snow in olympia park. When using this tool I noticed layers 5 and 6 were staying within the range 9-11 which makes sense because this area shows discrimination between snow.
For this feature I also used the inquire tool. I looked over the bodys of water using the inquire tool. At first I looked at the inlets and noticed while the 1-3 layers changed in brightness, layers 5 and 6 where not staying the same and were also changing. I then went over to the bay where there was alot of variation in the water but layers 5 and 6 did not change.
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