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.
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 - 4;
- move to previous frame - 5.
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.