of Vector Charts
Charts offer many benefits over other formats. Particularly Clarity,
Precision and Power.
- Clear at any orientation or scale setting, features are automatically
filtered to show the best image possible.
- The charts are made directly from official navigation charts
and also include up-to-date notice to mariner information.
- Control how a chart is displayed on the screen, point the cursor
at an object and more information is displayed. Vector charts
also provide the opportunity for software features that require
interaction with the chart.
are just a few of the things that can be done with vector charts.
Some of the Strengths of Vector Charts include:
Unlike raster charts, vector charts are a database of objects and
information. Given this, it is possible for users to easily retrieve
information from the vector chart database. For instance, in the
vector example below, you can see a yellow box that has latitude
and longitude information and the words "Anchorage Prohibited"
in it. This box is displayed when the cursor is placed over the
Anchorage Prohibited symbol.
Passport chart showing tooltip popup containing detailed information.
is the same regardless of orientation
Due to their mathematical nature, vector charts remain sharp and
clear at all zoom levels or orientations (NorthUp, CourseUp or NativeUp).
Notice how the old style raster chart below is significantly more
fuzzy (even with CrystalView turned on) than the equivalent vector
chart. You will notice the vector chart is highly detailed.
Split image showing side-by-side comparison of raster chart (left)
and vector chart (right).
Text the same regardless of orientation
Note the orientation of the descriptions and soundings on the vector
chart. Even though the program is running in CourseUp mode, the
soundings and descriptions are readable and facing the user. On
raster charts, the descriptions and soundings would be upside down
when the program is running in CourseUp mode.
Chart image, north up.
Same chart image, course up. Note the text orientation is still
Data Filtering commands
Vector charts are often referred to as "intelligent" charts.
For example, when using a vector chart, the navigator can turn on/off
various layers (for example, the "depth contours layer"
or the "lights layer").
The Passport Chart control toolbar is used to adjust the display
of Passport Chart windows.
Passport chart with depth soundings turned on.
Passport chart with depth soundings turned off.
Depth units can be set by the user
Note that the soundings on the vector chart are in meters. Due to
a vector chart's "intelligent" nature, it is possible
to display soundings in whatever measurement units the user prefers
(fathoms, feet, meters, etc).
Soundings shown in feet.
Soundings shown in meters.
When navigating, it can be difficult to match a light seen from
a vessel with those on the chart. The lights shown on Passport charts
have additional information associated with them, such as the range
and bearing from which they can be seen. Using this information,
the software can change the way the light is shown depending on
the vessel's position.
The yellow arrow in the upper left corner points to a light which
is out of range to be seen at the boat's current position, so it
is displayed as a dashed circle.
When the boat is within visible range of the light, the light is
displayed in its proper (green) color.
Click Here to see an example of zoom
levels to different scales.
Vector charts are very size efficient compared to raster charts.
It is possible to fit all of the charts for the entire world on
one CD-ROM. The table below compares some sizes of Passport charts
to NOAA/ChartKit charts.