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- EMD Prototype Application Instructions
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- To start the application, make sure that a mouse is connected
- and that the mouse driver is installed, and then, at the DOS
- prompt, type "emdap" for an EGA display or "emdap vga" for VGA
- displays.
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- A startup message will appear. When "Press any key to
- continue" appears at the bottom, press a key. The initial
- map display will be drawn, and a menu bar will be displayed
- at the top of the screen.
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- Functions are invoked by making menu choices using the mouse
- and the left mouse button. Place the cursor on the menu
- title ("Layers", for example), and press and hold the left
- mouse button. Moving the mouse up and down will highlight
- different menu selections. Releasing the left button while a
- selection is highlighted will select that function.
- If the button is released while the cursor is not on a menu
- choice, no function will be selected.
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- Some map functions are accessed using the left mouse button
- while the cursor is over the map area. Pressing and holding
- the left mouse button will cause a menu to appear at the
- cursor location. Functions may then be highlighted and
- selected in the same way as with the other menus. These
- map functions will use the cursor position to perform there
- function (for example "Zoom In" will use the cursor position
- for the center of the zoomed image).
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- Some functions use addition windows which include buttons
- (yellow rectangles), check boxes (square black outlines) or
- text areas (rectangle black outlines with block cursor).
- Buttons and check boxes are activated by placing the cursor
- inside the rectangle and pressing and releasing the left
- mouse button. To enter text in a text area, first activate
- it in the same way as a button or check box. The block
- cursor will appear in the area. Next, the desired text is
- typed. The backspace key can be used to correct errors.
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- The menu functions are briefly described below.
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- The "Display" Menu includes the following choices:
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- Pan Left, Pan Right, Pan Up, Pan Down - These choices cause
- the map display to be "panned" (more map is shown) in the
- given direction.
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- Center Point - This selection will open a window which allows
- the user to enter a latitude and longitude. The format is
- ddd mm ssh, where ddd is degrees, mm is minutes, ss is
- seconds, and h is either 'N' or 'S' for latitude or 'E' or
- 'W' for longitude. If the "Redraw" button is clicked, the
- map display will be redrawn with the specified coordinate in
- the center of the screen. If "Cancel" is clicked, nothing
- will be changed.
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- Exit - After asking for confirmation, the application will
- exit.
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- The "Layers" Menu will contain a choice for each layer in the
- map. If a layer is selected, a window will appear. The color
- and pattern used to draw that layer may be changed by using
- the "Color" and "Pattern" check boxes. The layer can be
- turned on or off by using the On/Off check boxes. After
- making changes, the "Save Changes" button must be pressed
- to use the changes. The "Close" button closes the window,
- and redraws the map if any changes were made.
- The changes are not permanent, and the default choices will
- return the next time the application runs.
- Note that the box must be closed before other functions
- can be selected.
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- The "Info" menu contains the following selections:
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- Cursor Tracking - This will open a window which will display
- the latitude and longitude of the pixel under the cursor,
- as well as the elevation of that point. The box may be moved
- by pressing the left button while the cursor is in the black
- area at the top of the window, and selecting "move" from the
- menu which appears. The box may be closed by clicking the
- "Close" button.
- Note that other functions may be selected while the tracking
- window remains open.
-
- Point to point line of sight - A line of sight profile can be
- generated between a starting point and an ending point.
- The starting point is selected by clicking the left mouse
- button at the desired position on the map. The coordinate
- will appear in the "From" text area. The "To" coordinate
- is selected the same way using the right mouse button.
- Pressing the "LOS" button will generate the profile. The
- function can be repeated with different end points as many
- times as desired. The window must be closed before other
- functions may be selected.
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- Radial line of sight - A line of sight "Fan" can be generated
- by choosing a center point, using the left mouse button, and
- a radius, using the right mouse button. The direction and
- width can be entered in the corresponding text areas. The
- "Fan" is drawn on the map. Red indicates no line of sight
- from origin, while green indicates that there is line of
- sight.
- The window must be closed before other functions may be
- selected.
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- Range circle - The center point is selected with the left mouse
- button. The radius can be set with the right mouse button,
- or by entering it into the text area. Pressing "Draw" will
- draw a circle of the given radius on the map.
- The window must be closed before other functions can be
- selected.
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- The "Map" menu may be accessed by pressing and holding the
- left mouse button in the map area, while no windows (except
- the menu bar or the tracking window) are open. The map menu
- contains the following functions:
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- Center Map - The map will be redrawn. The map coordinate at
- the current cursor position will become the new center point.
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- Zoom In - The map will be redraw at a larger scale. The
- current cursor position will become the new center point.
- If the map is already at the largest scale, this choice will
- be gray and may not be chosen.
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- Zoom Out - The map will be redraw at a smaller scale.
- If the map is already at the smallest scale, this choice will
- be gray and may not be chosen.
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