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GIS I - GROUP F (Names (Joe (Natural Resources - Specialization in…

- - - - Corresponds to the number of bands on the sensor
    - - The sensor footprint on the ground. Smaller the resolution, finer the detail
- - - - Identifies Features meet a set of criteria
      - On-screen
        
        Selections made by a human operator
      - Set Algebra
        
        Uses defined equations to select regions that match criteria
        
        <,>,<=,>=,=
      - Spatial Selection Operations
        
        Adjacency
        
        Containment
  - - - Look like Venn Diagrams
- - - - Thematic Data
        
        Measured Quantity
        
        Topography
        
        Classified Data
      - Image Data
        
        Formats
        
        Remotely sense of satellite imagery
        
        Digital image
        
        Digital Raster Graphics (DRGs)
      - DEM/ DTM
    - - Single Band DEM
      - Greyscale Image
      - Three-band Orthophoto
      - Multi-band Satellite Image
  - - - Placenames
      - Postal Address/ Postcodes
      - Cadastre - Record of Property Ownership
  - - - Points (0-D)
      - Lines (1-D)
      - Polygons (2-D)
    - - Georelational
        
        Topological
        
        ArcInfo Coverages
        
        Non-Topological
        
        ArcView Shapefiles
      - Object-Oriented
        
        Feature Relational
        
        ArcGIS Geodatabase
    - - RDMS
        
        Allows Data to be efficiently organized and related to in tables (I.e. Attribute tables)
        
        Links Spatial and non-spatial (attribute) information together.
      - DBMS is attribute (Non-spatial)
- - - - Curved sections of "surface" will distort features (polygons, lines, points) when you try to flatten it
      - Difficult to define a coordinate system from an irregular shape
      - measurements are imperfect and we continually come up with new systems as we learn more
- - - - Central Median
      - Tangent
  - - - Stereographic
        
        1
      - Orthographoc
        
        2
      - Gnomic3
  - - - Area where distortion is the least
- - - - Text
      - Double
      - Float
      - Long Intergers
      - Short Intergers
      - Date
    - - Nominal
        
        Name Data Types
      - Ordinal
        
        Ordered/Ranked data
      - Ratio
        
        Zero has absolute value, can be mathematically manipulated
      - Interval
        
        Zero has no absolute value, number values are representational
    - - Binary Large Object
    - - Feature Data Set
        
        Featured Class
        
        Featured Class
      - Featured Class
    - - Cons
        
        Loss of information
        
        May alter data "winner takes all"
      - Pros
        
        Faster
        
        Good at continuous surfaces
        
        Shows elevation
        
        Precipitation data
        
        Temperature
    - - Types of storage
        
        Byte
        
        0-255
        
        Binary
        
        1/0
        
        ASCII
        
        0-63,000
        
        Run length coding 2 3 3 3 3 3 4 4 4 = 2 5:3 3:4
      - No distinct boundaries
      - Discrete data type
        
        Integer (whole number)
      - Continuous data (floating point values)
        
        DIgital Elevation Model (DEM;continuous)
        
        DIgital Terrain Model (DTM;continuous)
    - - What was original map scale?
      - Cell Size
      - Datum?
      - Arial Coverage