Table of Contents
Advertisement
118
Chart types
Charts fall into three basic types:
Vector
A paper chart that has been digitized into a format consisting of line segments. Vector
charts can be easier to read than a rasterized chart, but may not include the level of detail
found in Raster charts. C-Map charts are examples of a vector chart.
Raster
A paper chart that has been scanned into a high resolution image. A raster chart has the
advantage of being virtually identical to the original paper chart from which it was
scanned. Maptech NOAA/BSB and PCX charts are examples of raster charts.
Aerial imagery
A high resolution, geo-referenced rasterized photograph taken from aerial or satellite
sources. You can overlay your boat's position on such an image, and get a visual
estimation of your position with reference to actual, photography based landmarks.
Maptech Photo Region charts are examples of this type of chart.
Displaying chart object and source information
C-Map charts used with RNS include a number of displayed objects for which information
is available, such as lights and buoys. They also contain additional source data for
structures, lines, open sea areas etc. You can use the right mouse menu to identify an
object or chart position and you can obtain detailed information for the selected item.
Waypoints
A Waypoint is a position entered on a chart as a reference, or as a place to go. All
waypoints placed on the chart plotter are stored in a waypoint database list which
includes additional information about each individual waypoint.
Routes
A route is made up of a series of waypoint will To make a route a series of waypoints is
placed on the chart, or can be selected from the Waypoint List. The boat's track can also be
saved and then converted to a route.
When a route is created it becomes the current route and is displayed on-screen. The
current route is maintained even when the system is powered-off. Only one route can be
current and is displayed (if it is in the field-of-view) as solid lines connecting waypoints. If
RayTech RNS V5.0 - User's Manual
Advertisement
Table of Contents
