The basic architecture should be made of numerous threads.  The **//constant//** threads will be the GUI, Geometry engine, Geometry analysis, Graphics and the GPS.  There are several threads that will be **//as needed//**: Read/Import and AgtekAccess.

**Activity**: GUI \\ **Content Provider**: Geometry Engine \\ **Service** : Geometry Analysis, Graphics, GPS \\ **Broadcast Receiver**: GPS

  *   __GUI__
      - Settings
           * This is where app settings and display choices are made
      - Graphical Screen (plan view ... see OpenGL)
           * This is the main screen graphics that displays lines, text and cut-fill maps.
      - Alignment of File to Lat/Lon
           * This is the means by which to create an transformation between Lat/Lon and North/East.
      - Display of analysis information (cut/fill, distance, etc...)
           * This is the place to display analysis information such as the cut-fill value a the current location.
  *  __Geometry engine__
     - Basic object
        * Color
        * Layer
     - Points
        * 2D
        * 3D
        * with time slice
     - Lines 
        * 2D
        * 3D
        * line segment
           * curved segments
           * line segments
        * Surface control
        * Contour
        * Timed
     - Triangles
        * For surfaces
     - Surfaces
        * Points
        * Lines (Surface control lines)
     - Text
        * Size
        * Font
        * Rotation
     - Blocks
        * Collection of lines/text/points
     - Symbols
        * Predefined blocks of a recognized form (Benchmark symbol)
  *  __Geometry Analysis__
     * Provides analysis reports of geometry items
        - Distance report
        - Cut-Fill Report
        - Elevation report
  *  __GPS__
     - Autonomous
        * On Phone
        * GRay
     - RTK
        * Topcon
        * Trimble
     - Transform location to local coordinates
  *  __Read/Import__
     - AGT
     - AGT (xml format)
     - ESW
     - DWF
     - LandXML
  * __AgtekAccess__
     * Incorporate current library
  * __Graphics__
    - OpenGL
       * Design data
       * Existing data
       * Zoom in/out
       * Pan
       * Text
       * Surface in Plan
       * Surface in 3D
       * Move about 3D surface
    - Connection to data structures