Split
a line into two.
We will split this line, which is 150.466 metres long on the ground,
into two parts.
(288173, 740531), 1:800
1. Display only theme 60.
2. Select the item and place
the crosshair at the cutting point (288259, 740526).
3. Use the Information icon on the CARIS Panel to show
that the line has actually been split. In this example, the shorter
piece has a length of 18.170 metres and the longer one has a length of
132.295 metres. They add up to 150.465 metres, 0.001 metre shorter than
the original line. This difference is due to the resolution of the
database.
Split
a line at its intersection with another line.
We will split the city block where it meets the building.
1. Enlarge that part of the database since it is difficult
to point precisely at their intersection. The following is a display at
1:5. If the item does not allow
you to enter such a large scale, enter the largest possible, say 1:10, and
then use the Zoom In icon to magnify further.
(288199, 740511), 1:5
2. After the split, you will notice that the cutting point
does not occur at the location intended. This is because the closest
resolution point is not at the intersection of the two lines, but at the
location of the cross.
As a result, the shape of that part of the city block has been changed
from a straight line to a bent one.
3. If you have zoomed in too much, the zoom out icon would
not work. You could, however, use theitem to return to the previous display.
4. The city block has now been split into three lines. In this example,
the three pieces have lengths of 49.822, 82.572, and 18.072 metres. They
do add up to 150.466 metres indicating that the errors due to resolution
could be canceled out.
The
demonstration Concepts: Effects of Resolution in Demo 3 explains this and
other effects of resolution on editing.
Split
the building where it meets the city block.
We have split the city block at the point where it
meets the building. The building is still one continuous line. Split it
where the city block was cut so that four lines meet at the same point.
There is a method of performing this precise split without having to
draw the database at a large scale.
Would that part of the building close to the cut point
change shape as well ?
Split
a line at a specified distance from a point.
This part of the city block is 84.312 metres long. We are
going to split it at a point 10 metres from the left. You will see that
because of the resolution, the piece created will not be exactly 10 metres
long.
1. Select the item and point close to the left end of the line.
2. Enter yes to accept this point as the origin and then
enter an offset of 10 metres for the split.
3. The piece will be highlighted for confirmation.
4. Measure the length of the two pieces. They are 10.028
and 74.284 metres, adding up to 84.312 metres which is identical to the
original length.
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