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GIS I - GROUP E (Maps (Map elements (data area/pane = largest part of the…

- - - - 1927 and 1983
    - - 1984
  - - - planar
      - cylindar
      - cone
    - - Distance
      - Area
      - Direction
      - Shape
- - - - connectivity
      - adjacency
      - planar enforcement
      - area definition
      - nodes, arcs, left/right polygons
- - - - LiDAR
        
        3D point cloud, very high resolution data
    - - Aerial Imagery
        
        Needs to be orthorectified.
      - Satellite Imagery
        
        Often Multispectral, can be used to make false color images
      - GPS
- - - - every 6 orbital planes, 4 satellites/plane
      - sends radio signal with location + time
    - - receives carrier signal and coded signal
- - - - uniform
      - average, central, most common value
    - - value
      - count
  - - - An alternative for structuring spatial data
      - similar to Russian Nesting dolls. Speed limit data stored inside street data which is stored inside city data.
    - - Vector style model- made of ,Nodes, Edges, and Triangles
      - Three connected Points create triangles (x, y, z)
- - - - A fast computer, large data storage capacities, and a high-quality, large display
    - - Tools to manage, analyze, and effectively display and disseminate spatial info ex: ESRI
- - - - identify tool
      - select feature tool
      - find tool
      - buffering tool
      - dissolve tool
  - - - proximity, intersect, containment
      - overlay ("cookie cutter"
- - - - Conic
      - Cylindrical
      - Planar
    - - Distortion
      - Data must have same projection to layer properly
    - - What is the purpose of the map?
      - What spatial aspects need to be preserved?
      - What is the spatial extent of the map?
    - - Mercator is a conformal cylindrical projection
      - State Plane Coordinate System uses
        Lambert Conformal Conic for wide states
  - - - Oblate Ellipsoid.
      - Sphere, this is what most Datums use
      - Authalic Sphere, when mapping 1:5,000,000
    - - Graticule, "network of intersecting lines"
      - Units
        
        degrees/minutes/seconds
        
        decimal degrees
    - - False Easting, makes locations positive
      - Projected for 2D use
    - - A spheroid
      - An origin
      - An azimuth
      - The relation between the spheroid to the geoid
- - - - Used to Measure elevation and building heighths
    - - Thermal Infrared
      - Visible
      - Near-Infrared
      - Mid-Infrared