Introduction
Some key aspects of geospatial analysis that I used to in order to complete this assignment was the usage of , resampmling, extract by mask as well as using fill. Below I will describe these 3 geospatial tools. The combination of using these 3 tools helped allow for the completion of a volumetric analysis of the Litchfield data set .
Extract by Mask (A raster clip within Geospatial Analysis):
Extracts the cells of a raster that correspond to the defined areas of the mask. A mask is what gives definition to layers such as giving properties and other visuals. . We do an operation like this with our project to get rid of surrounding areas that we no longer wanted.
Resample
Changes the spatial resolution of a raster dataset. The resample however can degrade the accuracy of the raster. We do an operation like this in our project to get cell sizes to match with one another.
Fill:
Fill sinks in a surface raster to remove small imperfections. A sink is a cell with an undefined drainage direction.
Methods
The dataset for this lab was provided to us as per most of the labs discussed throughout these blog posts. Using geospatial analytic software specifically that of ARC-GIS Pro, I went through the necessary steps of doing a resample, a extract by mask as well a fill. As a result of doing all of this I was able to further process the data in order to gain volumetric information about a specific area of land.
Discussion and Deliverables
By creating side by side maps I was able to see how differences in time changes the potential volume of the area of study. Furthermore, during the lab there were so technical difficulties encountered and I learned after the fact how to remove simple things to clean up the map such as removing the service layer credits. These small details are things that I have really learned more on how to manage within a map and have improved on from this lab by using this as a learning experience. In additon to the operations previosley discussed in this blog post, I also drew apon some of the other geospatial analaysis tools from the previous lab post which was part 1 one of this lab. One of those tools was the sueage of finding slope of land surfaces.
Figure 1: Finding areas of land with a slope value greater than 30 degrees. Green represent those areas.
Figure 2: Finding areas of land with a slope greater than 30 degrees and an elevation of greater than 245 meters.
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