AspEdit manual Border segments
In aeronautical publications, airspace boundaries are iften defined
AspEdit allows to define the "along xxx border" segments in a coded
form, as follows:
Upon export to OpenAir, all the points on the border segments will
Not only borders can be inserted this way, but also other airspace
Inserting a border segment
- Make sure that at least one point is defined before the
segment. The last point before the segment will be the
starting point. The point should be as close as possible
on the border, but doesn't need to match exactly.
- In the Area dialog box, press the
add or insert button.
- The Add element dialog box
- Select "Border segment", the Border
dialog box will open.
- Select the desired shape, specify clock or counterclockwise,
and specify the end point.
Modifying a border segment
In the list of the Area
dialog box, double-click on any line belonging to the border
segment, the Border
dialog box will open for the selected segment
Clockwise or counterclockwise?
In most geographical software, shapes are turning clockwise as
standard. This means that when viewed from the center, the points of
the shape are sequenced clockwise. If both the source shape
and the shape from which to insert a segment are clockwise,
"clockwise" should be selected in the Border
However, if any shape is counterclockwise, select counterclockwise
in the Border dialog box.
In any case, check the results on the map display. If the
result is not as expected, invert the selection.
Difference between the border function and the shapes function
- A border segment draws a section of the border shape between
two given points.
- The shape function calculates the intersection points between
the two shapes, and cuts both shapes at the intersection
points. There can be multiple intersecting segments in a
single shape operation. For further details, see Adding / subtracting shapes.
Borders can be countries or other airspace areas, also airways and
areas consisting of circle, border or shape segments.
Countries are located in separate files, see Countries.