YoNav Map Client Software (page 2)

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YoNav Software Documentation:
   Features | Quick Start | Installing | Connecting External Devices | Start YoNav Server | Configure Devices
   Troubleshooting | Create a New Survey | YoNav Data Formats

. . . page 1

Manually Add Range Measurements

Change Views

Routes, Runlines and Regions

Regions:  Defining, Editing, Filling, Deleting

Measure Routes

Using the LogBook and Viewing Errors

Pre-Cruise Considerations:  Setting Preferences and Tolerances

Sometimes it may be useful to manually enter ranges to some external object. YoNav will display the ranges as circular lines of position about the ship’s current position. As you enter more and more ranges and as the vessel moves towards the target, you can begin to graphically see the target location.

The Nav Status Bar has a dialogue box that allows you to set the view width in preset increments.

• If it is not visible, from the View menu, choose Nav Status Bar.
• Click on the down arrow in the small box to the right of the bar. Choose 10000 from the menu that appears. The map windows is now zoomed out to be 10000 meters wide.

  Note: You can change the default units of measurement. From the Edit menu, choose Preferences. Click on Distance Units you want to use.

• Either, from the Tracked Features menu, choose Draw Route, or click on (the Draw Route icon on the Toolbar) to start.
• Left-click to begin to draw a route. Left-click again to make a connection.

Note: As you draw the route, the length of the route line and the angle from xx are displayed.

• Right-click or press ESC to stop drawing the route.

  

Edit Run Lines

• Left-click to select a route line.
• Right-click to display a menu that allows you to
  • Add Waypoints
  • Add Runlines
  • Delete route line
• Right-click (or double-click) on a route line to display a dialog box. This box allows you to enter survey line coordinates such as starting and ending longitudes as well as change the colors of the route lines.

  

Define a Region

• Either, from the Tracked Features menu, choose Define Region, or click on the Define Region icon from the Toolbar to start.
• Left-click to begin to define a region. Left-click again to create a side; move the mouse again and left-click again to create a second side. Continue moving the mouse and left-clicking until you have completed define the region you need.
  

  Note: As you draw the region, the length of the route line and the angle from xx are displayed.

• Press ESC to stop drawing the route. If you draw a region that is not enclosed, YoNav will draw a line from the first point you clicked to the last point you clicked to complete the region for you. Note: Once you complete a region, each side is labeled.

Edit Region

Once you have defined a region, you can edit different aspects of it.

• Left-click inside the borders to select a region.
• Right-click (or double-click) inside the region to display a menu that allows you to
  • Add Waypoints
  • Edit Region (add runlines)
  • Delete Region

Fill Region with Runlines

• Right-click (or double-click) in the region to display a dialog box. This box allows you to fill a region with runlines.

  

• Define the following parameters for the runlines:
  • Spacing - The spacing parameter allows you to specify the interline spacing in meters. This is the distance between two adjacent lines measured perpendicularly.
  • Bearing - The bearing parameter sets the initial bearing of the generated lines. This parameter is specified in degrees clockwise from north.
  Below is a region with runlines.
  

Edit Runlines

Once you have defined runlines for the entire region, you can edit individual runlines.

• Double-click on a Runline to display the Enter Survey Line Coordinates dialog box.
• Like routes, individual aspects of run lines can be changed. In this dialog box, you can enter survey line coordinates such as starting and ending longitudes as well as change the colors of the runlines.

Delete a Region

• To delete an entire region, click inside the region – but not on a survey line. You’ll know the region is selected when the region background is highlighted. Once it’s highlighted, press the Delete key.
  Or
• Double-click inside region to get dialog box and choose Delete.

Measure Routes

Use the measure function to determine the length of a route.

• Click on the Ruler in the ToolBar or, from the View menu, choose Measure.
• Left-click to start measuring. The initial measurement is displayed: "0’@00 degrees." Point zero is the initial point at which you clicked.
• Move the mouse along the direction you want to measure. The distance from point zero and the angle at which you are proceeding are displayed.
• Left-click again to end the individual measurement.
• Right-click to end the measuring process.
• All measurements are in meters and degrees.

Write your cruise report using the LogBook. The Log has several important features:

• The time and position of ship are always shown in dialog box and are recorded with every entry made into the Log.
• The LogBook is an ASCII file and can therefore be exported and read by a wide variety of applications.
• It is common practice to make a note a start of the cruise, and then make another note at end. Ship’s time and position for the trip’s critical points are then recorded.
• To add a LogBook entry, click on the pencil icon
• or, from the Edit menu, choose Add LogBook entry.

  

• To view, print or save the LogBook, from the File menu, choose Open LogBook.

  

View Errors

To view any errors YoNav has generated, from the Edit menu, choose Error Log. Or click on the Sad Face icon in the Toolbar. On you read the error messages and acknowledge them, the Sad Face icon is grayed out.

When planning your trip, consider some of the following items

• Coast line data: Is there vector coastline fdata available for the area you plan to survey? Is this data in a format that is compatible with YoNav? YoNav supports the ESRI shapefile and TIF/TFW formats. Is the data in the proper map projection? YoNav only supports UTM projections.
• Bottom imagery: Is there bottom imagery available? YoNav can support the simultaneous display of vector and raster background maps as long as they are in the ESRI ArcView format.
• Aerial photography: Same here, make sure the imagery is in one of the ESRI supported formats.
• Know the coordinates of the area you plan to survey
• What GPS hardware will you require? What accuracy do you require. Are the GPS systems you want controlled by DOD regulations? Are you checked out on the operation of these systems. P-code receivers are tightly controlled and are restricted in the way that they must be shipped and who can use this technology. Contact Fred Payne for more information.
• Will you be requiring the seismic shot control services? This support requires a special version of the YoNav software and hardware to support the contact closure or TTL pulse needed to trigger external seismic firing systems.
• Contact the Marine Facility and discuss the various options for using your data in YoNav.

Set Preferences

There is a significant amount of cruise planning that can be done at your desk before ever mobilizing a research vessel. Determine the following:

• What distance units should be displayed
• How do you want the position units displayed.
• Specify the velocity units

  And:

• Do you want to the software to keep the ship centered in the middle of the screen at all times?
• Do you want a grid overlay drawn?
• Do you want tolerance units drawn?
• Do you want track annotations drawn and if so, at what time interval (in seconds) do you want them?
• Decimal places for position and distance precision are also set here.

  Whenever possible, pre-plan your survey lines. Don't leave it up to the technician to do this.

Set Tolerances

Set your tolerances before embarking on your trip; if you do, your measurements will be consistent.

Did you know that YoNav can warn you when any of the following events occur?

• If the speed of the ship falls below a certain speed.
• If the depth of the keel becomes shallower or deeper than a specific depth, or if the depth rate of change exceeds a specified amount.
• If the cross track distance for runlines exceeds a specified amount
• If Waypoints are closer or further than a specified amount.

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior    U.S. Geological Survey    Western Coastal & Marine Geology
URL: http://walrus.wr.usgs.gov/marfac/MC2.html
for more information, contact John Gann
maintained by Laura Zink Torresan
Last updated 7 November 2006 (lzt)