Lab 4 - Spatial Enhancement, Multispectral Data, and Band Indices

 This feature is a source of water, specifically waterways and inlets in the area around Seattle including Puget Sound. I chose to subset and highlight the area of Puget Sound.


I achieved this using the grayscale version and selecting level 4 I then used the Panchromatic ribbon and then the adjust radiometry and the breakpoints tool using the following settings




Starting with the Grayscale Image in Erdas Imagine, I highlighted the small spike in layer 2 using the histogram tool to isolate the spike, comparing this with the multi spectral imagery made it apparent that the feature that spike caused was the snowcaps on top of tne Olympic Mountains. 






To make the area of Lake Taps pop I hanged the landsat imagery so that Layer 6 was Red, Layer 2 was green and Layer 3 was blue, this caused the lake to appear a vivid green color in comparison to the larger puget sound and Grays Harbor areas. I’m not clear on why this is the case or what might cause it as I’m not an environmental scientist and I do not feel

sufficent information is given in the lab to understand this for someone who is not familiar with environmental science.


The Following youtube videos were far more helpful in understanding the assignment and where these techniques might be helpful




The following video is extremely helpful and has useful chapter breaks that allow for easy review of segments of the lecture if something does not make sense.


Finally, the following video that I found somewhat accidentally also provides an excellent overview though it is not specifically GIS related





Comments

Post a Comment

Popular posts from this blog

GIS 5007 - About Me!

Image
 Hi - I joined the GIS program in the fall of 2024 to formalize my GIS training after more than a decade of learning to use GIS independently. I'm an Archaeologist, with my BA and MA in Anthropology, and have worked for the UWF Archaeology Institute as a research associate since 2015. In the past few years, I have become actively involved in cemetery preservation and research. Something that you can read a little bit more about on my story map . Ultimately I am hoping to add GISP to my credentials list. Resetting a marker in AME Zion Cemetery Exploring Oakland Cemetery in Atlanta with the Association for Gravestone Studies Conference.
Read more

GIS 5100 Module 5 Damage Assessment

Image
 For this week's exercise we were tasked with conducting a structural damage assessment of a few block area impacted by Hurricane Sandy. We were asked to create a map of the path of Hurricane Sandy We were then given a very large raster data set with a very small project area to assess structural damage. Knowing something about Hurricane Sandy and the amount of damage, I immediately ruled out the possibility that there were any structures with no damage or only affected or sustained minor damage. I then narrowed in on determining which structures were destroyed and which sustained major damage. To complete the analysis of damage within a distance of the shoreline I used the created shoreline to create buffers of 0-100 m, 100-200m, and 200-300m. I used a basic join to derive counts for the following result
Read more

GIS 5100 M4

Image
 For this week's exercise, we spent a considerable amount of time evaluating out-of-date elevation data, looking at the potential impact of storm surge data. This included comparing potential inundation models using LIDAR and USGS DEM-derived data. For the first exercise we were asked to compare Lidar data from New Jersey pre and post Hurricane Sandy. We were given several areas to asses and evaluate what has changed as well as looking at how the area has redeveloped based on a more recently derived buildings shapefile. We then turned our attention to the Tampa Bay Area where we looked at different methods of modeling storm surge and evaluated the predictive ability of each model. This included comparing counts of the types of buildings each building would see as flooded or not As well as comparing which models predicted a percentage of each type of building would be flooded to compare the accuracy of the different models Finally we created a map showing the agreement between the d...
Read more