Monday, September 25, 2017

Lab 3 – Determining Quality of Road Networks

This week we compared the completeness of two road networks, TIGER and Street Centerline in Jackson County, OR.

I used the intersect tool on both sets of street data against the grid shapefile. I joined both results to the grid shapefile and created a new column to calculate the difference in length between each street set for each grid. Below is a map of the results.

Saturday, September 23, 2017

Lab 2 – Determining Quality of Road Networks

This week covered determining the positional accuracy of road networks using intersections and comparing the intersection to a orthophoto. The distance between the point and where it was located in the orthophoto was put in formulas in excel to determine the accuracy.  Below is the sample points that I used.

Using the National Standard for Spatial Data Accuracy, the data set tested 12.3 feet horizontal accuracy at 95% confidence level.

Wednesday, August 9, 2017

Module 11: Sharing Tools

This week was about sharing ArcGIS tools.  Adding comments to the tool, adding a script to the tool, and adding a password to the tool was also covered.  Below is a screenshot of the tool that I added descriptions to and results of the script.

Wednesday, July 26, 2017

Lab 8 – Damage Assessment

In this weeks lab I tracked a hurricane path and did a damage assessment from the hurricane.
For part of the lab I assessed homes in the path of hurricane Sandy for damage based on aerial images. below is a screenshot of the table with the damage assessment and houses color coded based on damage.

Wednesday, July 12, 2017

Lab 6 – Crime Analysis

This week I made a crime hot spot map using different crime analysis techniques.  These included grid based and kernel density methods.  The below map shows the results of these methods on burglaries in Albuquerque, NM.

Module 7: Explore/Manipulate Spatial Data

This week I used python to create a new geodatabase and copy data to it. I also made a dictionary, and populated it.  I used cursor methods and added print statements to the beginning and end of each step.  Below is the result.

Friday, June 30, 2017

Lab 5 – Spatial Accessibility Modeling

This week we covered network analysis. I started with doing ESRI tutorials for the network extension. Then for part B, I reviewed hospital proximity to people. For part C, I analysed the effect of closing a campus in the Austin Community College system in Travis county, Texas.  Below is the map. I got stuck on several parts of this lab.