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As a matter of fact, tracing is always rather random. One may say: "I
am orderly digitizing road network" but hardly know which line will
be selected at the next crossroad. Will it be right or left turn, line
continuation upward or downward, and so on?
The most painstaking work does not guarantee against errors and omissions.
Thus, it is reasonable to shift material automatically at tracing and check-up.
The Inspector Tool is developed to make the process
more well-ordered. The tool helps to review the entire project field methodically
basing on the following general approach:
- inspection zone is user-specified. It is entire project field by
default;
- frame size and overlapping of neighboring frames are user-specified;
- inspection zone is divided in frames and you may look them through
one after another.
Remember that Inspector enables you to move outside
the current frame repeatedly and/or change the scale of screen output. "Move
to next frame" command restores current scale and position first of all
and should be selected again for actual shift of material represented on the
screen.
Project field fragmentation in separate frames is particularly convenient for
experienced operators. It helps to "clean" the current frame completely
(leaving its limits many times perhaps) before you move to the next one.
Tool control is very simple. You may:
- specify parameters (and may be zone) of inspection and start the operation;
- move to next frame - M;
- move to previous frame - N.
As project digitization requires several sessions as a rule, Inspector "remembers" current
frame. Just press M hot key to continue the process
after a break. .
If you change scale or frame overlapping when review is already started, click
the Continue button to avoid both omissions and
beginning from the beginning.
Direction group
four buttons of the group allows one to select the route for
data inspection. We recommend to use vertical or horizontal s-turn.
Scale
the field contains the scale of project representation at inspection
and thus allows non-limited use of scaling at tracing and control. Scale change
does not violent the order of inspection.
Frame overlapping
the field contains size of overlapping zone of neighboring
frames. The zone will be represented in both frames that helps operators to
orient at move from one frame to another.
Show inspection zone boundary
select the option if you want to see the boundaries of revision
zone when you close the Inspector tool dialog
box.
Hide automatically
select to fold the dialog box automatically when you leave
it for inspection zone specifying.
Zone
click the button to make boundaries of inspection zone visible
and editable. You may both change position of every boundary or move the zone
itself (of course, if it is smaller than the project field). Inspection zone
comprises the entire project field by default.
Start
click the button to close the dialog box and start review of
the first frame. Inspection always starts from the upper left corner of the
zone.
Continue
You needn't return to the first frame if you change the Scale and/or Frame
overlapping parameters while project inspection. The Continue button
allows to resume the process from where you stopped for changes.
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Technology
Digitization
Color
separation
preprocessing