3.2. Adding chart features

3.2.1. Chart features toolbar

Debrief also allows you to add items to the plot.

These items are contained in two menus; Chart Features and Drawing. In Debrief, hover the mouse over them to see what type of item they create.

Figure 3.3. Chart features menu

Chart features menu


[Important]Important

It is important to note that each time you click on an item from the toolbar, a new instance of it is created, it does not re-open an existing item.

3.2.2. Scale

The Scale button provides a scale, indicating to the viewer the current area of coverage of the plot. Once created the scale values can be set automatically or manually, as described below:

Auto Mode

In auto-mode Debrief assesses the current screen size and area of data covered, and attempts to set the most appropriate range of values and step size for the scale. A good working practice is to switch to auto-mode to allow Debrief to estimate the optimal values, then switch out of auto-mode to fine-tune the ScaleMax and ScaleStep values provided.

Color

The colour used to draw the scale.

Location

The corner of the plot where the scale is placed.

ScaleMax

The maximum value of the scale (in yards)

ScaleStep

The size of the steps used to break up the scale (again in yards)

Visible

You can clear the visibility flag to temporarily hide a scale, allowing you to switch between scales, for example.

Units

Use this list to select the units displayed in the scale

Figure 3.4. Sample scale

Sample scale


3.2.3. Grid

Next, try with a new grid:

Auto Mode

In auto-mode Debrief assesses the current screen size and area of data covered, and attempts to set the most appropriate range of values and step size for the scale. A good working practice is to switch to auto-mode to allow Debrief to estimate the optimal values, then switch out of auto-mode to fine-tune the ScaleMax and ScaleStep values provided.

Color

The colour used to draw the scale.

Delta

The interval between plotted lines

PlotLabels

Whether to label the grid. See tip below for details regarding how the labels are formatted

Visible

Whether you can hide the grid, of course.

[Tip]Tip

Two methods are used to produce grid lines:

  • Lat/Long Grid. Where angular delta units are selected (degrees, minutes), vertical and horizontal grid lines are calculated relative to the latitude of the plot (thus a 1 degree grid requested at 60 degrees North will have grid lines of 60nm separation in latitude, but with lines of longitude at 30nm separation).

  • Square Grid. Where distance related delta units are selected (m, yd, km, nm, etc), the vertical and horizontal grid lines are constructed using the same delta distance (thus a selected delta of 1 kyd will have lines of 1 kyd separation in the horizontal and vertical).

3.2.4. Local Grid

The Local Grid ( ) is a modified grid for which the origin has been over-ridden. Change the Origin attribute to move the grid origin. The PlotOrigin attribute has been provided to draw a small point at the origin of the grid - useful when initially designing/recording the grid.

3.2.5. Coastline

The Debrief installation includes a low-resolution coastline datafile. Whilst it does cover the whole globe, it does so at a low resolution, so is only useful for an overview. The vectored chart data discussed later provides a much lower resolution of data.

Figure 3.5. Sample of default coastline data

Sample of default coastline data


3.2.6. Vectored data

The addition of vectored chart data is covered later in this document, in Section 7.3, “Viewing VPF data”. The image below provides a sample of the level of detail supplied.

Figure 3.6. Sample of vectored coastline data

Sample of vectored coastline data


3.2.7. ETOPO gridded bathy

Whilst the VPF dataset provides a contoured bathymetry within broad depth steps, the ETOPO dataset provides a gridded bathymetry in 5' or 2' steps. When you ask Debrief to plot an ETOPO background, Debrief will try to load an ETOPO-2 dataset first, followed by an ETOPO-5 dataset if that is unavailable. The image below provides a sample of the level of detail supplied.

Figure 3.7. Sample of ETOPO gridded bathymetry

Sample of ETOPO gridded bathymetry


comments powered by Disqus