Abbey S Week 4

Chapter 1:

• GIS is composed of 5 parts: hardware, software, data, procedures, and people
• Can be used to map relationships, patterns, and trends in addition to simple cartography
• Interesting how GIS has been around since the 60’s. I wonder how difficult it was to use it back then
• Point, line, polygon data = vector data
• Features of same type = layers
• Raster= digital surface
• Attributes= in depth data

• Don’t be like me and do the exercises in the classic map view, and then get confused as to why everything looks different

---

Chapter 2:

Exercise 2A

• PM concentrations are highest in Africa
• To restore contents, go the ‘View’ and select contents
• Geoprocessing toolbox is right next to contents
• Shanghai has the largest population

Exercise 2B

• Symbology= the way GIS features are displayed on a map
• The distance between San Antonio and Toronto is 1,440.32 mi

Exercise 2C

• The highest building is 339.8 ft
• Extrusion= stretching flat 2D features vertically to appear 3D
• This was cool- I felt like I was playing the Sims lol

---

Chapter 3

Exercise 3A

• The field name that indicates the state within the which the county features are located is called STATE_NAME
• 10575 residents of Wayne county are between 22-29 yrs
• Definition query: limit visible counties to only in Illinois, but source data will not change 
• Clip: Select data based on layer of boundary (However, Illinois boundary not defined)
• Select and export: select counties in Illinois and export to new dataset

Exercise 3B

• Columns= fields
• There are six years of data represented
• Graduated colors= features are assigned a color that represents a quantity
• Classification methods:
  • Manual interval classification
    • Modify classification breaks manually with manual intervals
  • Equal interval classification 
    • Range of data is equally divided by the number of classes chosen
  • Defined Interval Classification
    • Similar to equal interval, but define interval size to determine class number
  • Quantile classification
    • All classes have same number of features
  • Natural breaks classification
    • Based on natural groupings inherent in the data
  • Geometric interval classification
    • Creates class breaks that are based on class intervals with a geometric series
  • Standard deviation classification
    • Creates classes according to a number of standard deviation classifications

• I did not see a clear correlation between income and 2010 obesity rates

Exercise 3C

• I was not able to retrieve the infographics even though I was signed in to ArcGIS online 🙁

Exercise 3 dimension

• There are 4 food deserts in Knox county
• Spatial join= define spatial relationship between 2 layers and combine attributes into an output layer

---

Chapter 4

Exercise 4A

• Coordinate systems
  • Geographic coordinate system- uses latitude and longitude to define locations of points
  • Projected coordinate system- uses map projections to transform longitude and latitude coordinates into planar coordinates
• On the fly projection
  • Projected coordinates on first layer applied to subsequent layers
• Metadata
  • Textual info about dataset

Exercise 4B

• Snapping= magnet
• The selected line has 4 vertices

Exercise 4C

• The shape area value was halved

---

Chapter 5

Exercise 5A

• Conflict types:
  • Riots/protests
  • Battle
  • Remote violence
  • Strategic development
  • Violence against civilians
• 727015 fatalities

Exercise 5b 

• 41 riots/protests
• 71 fatalities

Exercise 5c

• Layer by attribute and Summary statistics are combined
• 26323 fatalities