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+ Start Here   
+ Background   
+ Common Midas Concepts   
+ Getting Started - Part 1   
+ Getting Started - Part 2   
- Working with Files   
   - File Basics   
   + The AUX List   
   + Basic File Commands   
   + Lab 1   
   + File Names   
   + File Types   
   + Lab 2   
   + Listing Files   
   + Lab 3   
   - Plotting Files   
      - Overview   
      - Layers   
      - Features   
      - PLOT   
   + Lab 4   
+ Option Trees   
+ Macros - Part 1 (Basics)   
+ Macros - Part 2 (Graphics)   
+ NetBeans - Part 1 (Setup)   
+ NetBeans - Part 2 (GUIs)   
+ NetBeans - Part 3 (Profiler)   
+ Eclipse - Part 1 (Setup)   
+ Eclipse - Part 2 (GUIs)   
+ Primitives   
+ WebStart   
+ Maps & Imagery   
+ X-Midas Interoperability   
+ RMIF & Remoting   
+ Installing NeXtMidas   
+ Support & Maintenance   
+ File Handlers   
  • Plot Features:
    • A feature is a single element of data rendered on a plot.
      • Features can include: boxes, ellipses, points (with various symbols), lines, etc.
      • Features can be added to PLOT with the FEATURE command.
    • There are several types of features; a few of them include:
      Box
      A rectangular box with center at (x,y) and length/height (dx,dy).
      Elps (Ellipse)
      Draws an ellipse.
      HLine / VLine
      Draws horizontal/vertical lines.
      Symbol
      A point rendered with one of the various symbols, including: 
      CROSS   - A 'x' symbol.       TRIANGLE  - A triangle symbol.
PLUS    - A '+' symbol.       UTRIANGLE - A triangle (up).
STAR    - A '*' symbol.       DTRIANGLE - A triangle (down).
CIRCLE  - A circle symbol.    RTRIANGLE - A triangle (right).
SQUARE  - A square symbol.    LTRIANGLE - A triangle (left).
DIAMOND - A diamond Symbol.   ASCII-<s> - An ASCII string <s>.
DOT     - A small dot/pixel.  ARROW     - A block arrow.
AERO    - An airplane symbol.
      Symbols have a number of options, including size, fill/no-fill, rotation, etc.
    • A complete list of the feature types and a complete list of symbols is included in the FEATURE explain file.
    • A plot can have many different features.
      • Features are not necessarily homogeneous.
      • Attributes of different features may vary greatly.
      • Features typically have a large amount of variability while elements in a layer are usually homogeneous.
      • Features can be placed in Feature Groups for ease in adjusting similar Features and to have them be displayed in a tree type format with the MMB menu.
      • One of these Features can be designated as an "Elastic Feature", allowing it to be selected and then stretched or moved.
    • A LayerDrawable can also have Features.
      • These are listed in the MMB under the Layer.
      • These Features can also be placed in Feature Groups.
    • Like layers, it is possible to create your own feature types.
    • For more details see the FEATURE explain file or see %test_feature in the test area of SYS.
Don't Make This Mistake:
Take care when sizing features. The type Symbol uses Pixel-Size (i.e. feature is the same size on screen regardless of zoom level), others use Real-World-Coordinates (i.e. feature zooms in relation to the plot).

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