Files
Is this a good or bad pathway? Why?
C:\Users\Charles\Desktop\School\GIS 201\Lab07\My_Lab_07_On_GPS_Coordinate_Systems!!
Terrible. This breaks almost every Mel/Russ rule!
What does GIS stand for?
Geographic Information System
What is the difference between Raster and Vector data?
Raster: Grid
Vector: Points, lines, polygons
"Raster is faster but vector is better"
What are the different data types other than Interval?
Nominal, Categorical, Ordinal, Ratio
Place the steps of map design in the correct order:
Selecting the data, arranging the page, symbolizing the information, reviewing the map, editing to improve the map
Whats the difference between a small scale map and a large scale map?
Small scale shows a large area (1:50,000,000), whereas large scale shows a small area (1:500).
How do you fix a red exclamation point?
How many attributes can one cell of a raster hold?
One
What is the difference between interval and ratio data?
Ratio data has a significant zero point, whereas interval has an arbitrary zero.
Map projection depends on _____
The objective of the map.
Why should you not upload a *.mxd file for Russ to grade your lab from?
*.mxd files store collections of data for viewing and analysis, but does not actually store data.
How many fields can a single attribute have?
Unlimited
Whats the difference between Discrete and Continuous data?
Discrete represents objects as lines or polygons, has relatively few values that may change abruptly at boundaries, and adjacent cells often have same values. Continuous data has thousands or millions of potential values, few adjacent cells have same values, and values may change rapidly from cell to cell.
What are the map types that correspond with the different data types?
Nominal & Single Symbol, Categorical & Unique Value, Ordinal/Interval/Ratio & Quantities(Graduated color, graduated symbol, dot density)
What are the five different map purposes?
Locating- Map shows location of some place or places on interest. (tourist map)
Navigating- Allows user to identify different travel types. (road atlas)
Compiling- Gathers very detailed and specific information on a topic. (Geologic map)
Convincing- Created to illustrate the conclusion of a study. (Falcon nesting behaviors within a county)
Comparing- Using multiple maps to compare information. (Heat index of 1990 vs 2019)
What does a .lyr file store?
It stores layer symbology.
What are the three parts of the GIS process?
Data acquisition, data processing, and information output
What is metadata?
Data about the data.
Who/what/when/where
CORRECT ANSWERS HERE
Which labels give the creator control? Which labels does ArcMap control?
Graphic text and annotation gives the creator more control.
Dynamic labels originate from the attribute table within ArcMap.
What are the three main file extensions needed for a shapefile?
*.shp—The main file that stores the feature geometry; required. *.shx—The index file that stores the index of the feature geometry; required. *.dbf—The dBASE table that stores the attribute information of features; required.
What three things are necessary for Geographic data?
Spatial data, Attribute Data, and metadata
True or False: Both raster and vector data rely on x-y values to locate data to a particular spot of the Earth's surface.
True! The choice in how to store this x-y values is called a coordinate system.
What is normalization? Give me 2 examples of normalization
Normalization “adjusts” the data or puts it
into context.
–Population/square mile
–TV’s – TV’s/household
–Miles of interstate / state area
What are the eight cartographic generalization tools? Which ones would you use sparingly and why?
Refine- Omits certain features.
Simplify- Lines and polygons smoothed to less detailed shapes
Aggregate- Many smaller features becoming on large one.
Collapse- Changing features into simple forms.
Classify- Changing a detailed set of attributes into a simpler set.
Typify- Using "fake" points as representative rather than actual features.
Displace- changing features slightly so they don't cram each other.
Exaggerate- Changing features to make them appear more important.
These last three can falsify information!