- Lab 2 - Macro Procedures:
  - For this lab you will be writing a macro that takes in two sets of latitude/longitude points (4 arguments) and computes the distance in meters between them.
  - The equation for this is:

        d = MAG(v1 - v2)

    where `v1` and `v2` are vectors in a `CARTESIAN` coordinate system.
  - Inside the macro, make a procedure to convert from `GEODETIC` to `CARTESIAN` (The conversion must be done before subtraction). The `nxm.sys.lib.Position` class contains a method to perform the conversion.
  - You will need to use the following commands:

        NEW     -- to create a Position object
        INVOKE  -- to invoke the method in Position to convert
                   from GEODETIC to CARTESIAN
        CALC    -- to compute the distance once the points are
                   converted to CARTESIAN

  - When you are done use `UPDATE` to add `MISS_DISTANCE` to the dictionary and try it out. The output should look similar to this:

        nM> miss_distance 44 33 45 34
        Miss distance is 136644.17740578306 meters

  - Hints:
    - If you want have an output parameter from a procedure, you can take in the result name and set the value of it like so:

          call myProc 10 res1  ! Sets res1 result
          call myProc 20 res2  ! Sets res2 result
          ...
          procedure myProc N:in U:myOutputRes
            result ^myOutputRes in
          return

    - You can convert the X,Y and Z values of a `Position` object into a Midas `VD` using the following syntax:

          nM> result myVector (pos.x,pos,y,pos.z)

      where `pos` is a `Position` object.
    - `CALC` can subtract vectors and get their magnitudes.