Module 5 Lab

 

This weeks map is a supervised classification of Germantown, Maryland. We learned how to used classification tools in ERDAS imagine to classify and recode features. We used histogram plots of different bands to remove spectral confusion. In my map I used TM False Color IR because I believe it caused the least spectral confusion. I did enjoy this lab but I don't feel the most confident on the material.

Module 4

 

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. 

Module 3 Lab

 

This weeks lab was to introduce us to ERDAS image. We began the lab by calculating EMR properties by using Maxwell's wave theory and Planck Relation. These are pretty simple equations but I struggled with knowing if I got the correct answer since no examples were provided.

Next we open ERDAS image for the first time. It was interesting learning a new program. We learned the basics on how to view images. The third part of the lab was to explore the metadata of the images. This gave me a better understanding of pixels, radiometric resolution, and spatial resolution.