INSERT FLY LINE (InsFly)

Type: Interactive Application

Digitizes a line in fly mode in which the line is drawn freehand in stream mode. Places the proper number of points on the line as determined by user parameters to make the line smooth. This is useful for digitizing contours; water lines and DTM break lines. A manual mode may be entered when in stream digitizing mode which allows points to be digitized manually.

Two key layouts are supported by Insert Fly Line and are the VrOne key layout and the old style key layout. The key layout may be set in Enter Parameters from the Main Menu.

Local Commands

Key-in	Description	Range
LAY=	Layer number	1 – 10001
MOD=	Mode	1 = Line 2 = Spline
GRP=	Graphic pointer	1 – 60
WID=	Width	0 – 255
PEN=	Pen number	1 – 256
CON=	Construction flag	0 – 1
NGR=	Non graphic pointer	32 bit
LNK=	Link number	32 bit
FC=	Feature code	15 characters
DIG=	Digitized point at location specified	X Y Z
FKEY=	Change to function key properties	Function Key Name
TUBRAD=	X,y tube radius	Inches \| Mm
MAXDIS=	Maximum tube distance	Inches \| Mm
DITDIS=	Dither distance	Inches \| Mm
ZTUB=	Z tube radius	Ground value 0 = Disabled
LAKLIN=	Makes Lake Line in which all the elevations on the line are the same as the first point.	0=Off 1=On
KEYLAY=	Key layout	0=Normal 1=Old style

PARAMETERS

TUBE FILTER

When filtering lines there are two parameters that are used to determine the points that are kept:

When a data point falls outside the current tube, the last point within the tube is saved and a new tube direction is set based on the new point and the last point. If a line is straight and points do not move out of the tube, the Maximum tube distance is used to save points.

When setting these parameters, the Maximum tube distance should always be larger than the Tube radius.

Example:

Tube radius	02 inches or 0.5 mm
Maximum tube distance	0.5 inches or 12 mm

DITHER DISTANCE

When collecting a line all the points are first placed in a buffer. When the line is ended the points are then filtered using the current parameters. The Dither distance specifies how far the floating mark or cursor must travel before a point is placed in the buffer.

Example:

Dither distance: .05 inches or 1.3 mm

Z TUBE RADIUS

If this radius is set to a number greater than zero, the points in the input buffer will be filtered by elevation also. This parameter is entered in ground units.

When a line is being collected points are stored in a temporary buffer using the Dither Distance. When the line is saved the points in the buffer are filtered using the Tube Radius, Z Tube Radius and Maximum Distance. Points that are “Forced” during collection pass thru the filter unmodified.

Button Assignments

Ins Fly Line – Main

	Button	Description
1	Start	Starts the line
2	Z +	Increments the current elevation by the contour interval
3	Z -	Decrements the current elevation by the contour interval
4	Z Round	Rounds the current elevation to the nearest contour interval
5
6
7	Enter Params	Enters parameters from dialog box
8
9
*
0	Toggle Snap	Toggles snap on/off
#	End	Ends Edit Line

The contour interval may be set in Z Source (Zsou).

Ins Fly Line – Stream (VrOne layout)

	Button	Description
1	Force	Forces a point into the buffer.
2	Close	Closes and saves the current line
3	Backup	Backs up one point and drives the instrument to that point if possible
4	End line	Ends and saves the current fly line
5	Dig manual	Allows digitizing of points manually
6	Splice/Pause	Starts Splice menu
7
8
9
*
0	Toggle Snap	Starts Snap menu
#	End	Ends Edit Line

Ins Fly Line – Stream (Old style layout)

	Button	Description
1	End line	Ends and saves the current fly line
2	Close	Closes and saves the current line
3	Backup	Backs up one point and drives the instrument to that point if possible
4	Force	Forces a point into the buffer.
5	Dig manual	Allows digitizing of points manually
6	Splice/Pause	Starts Splice menu
7
8
9
*
0	Toggle Snap	Starts Snap menu
#	End	Ends Edit Line

Ins Fly Line – Splice (VrOne layout)

When this menu is entered, point collection stops and the operator may look around. This is often used when pulling contours or break-lines thru dense vegetation. Splice may be used to remove the end portion of the line and continue from that point.

	Button	Description
1	Force	Forces a point into the buffer.
2	Resume	Resumes line collection
3	Splice	Digitizes the splice point. The line from this point to the end of the line will be erased, the instrument will be driven to the closest point on the current line and digitizing will resume.
4	End line	Ends and saves the line
5
6
7
8
9
*
0	Toggle Snap	Toggles snap on/off
#	End	Ends Edit Line

Ins Fly Line – Splice (Old style layout)

	Button	Description
1	Splice	Digitizes the splice point. The line from this point to the end of the line will be erased, the instrument will be driven to the closest point on the current line and digitizing will resume.
2	Resume	Resumes line collection
3	End line	Ends and saves the line
4	Force	Forces a point into the buffer.
5
6
7
8
9
*
0	Toggle Snap	Toggles snap on/off
#	End	Ends Edit Line

Ins Fly Line – Snap

This menu will be used if snap is turned on from the Stream menu and is a modified version of snap that allows snap and end. Due to the nature of Fly Line snapping to end a line requires this menu.

	Button	Description
1	Snap and End	Snaps and ends the line.
2	Resume	Resumes line by returning to the Stream menu
3
4
5
6
7
8
9
*
0
#

Ins Fly Line – Dig Manual

Points may be digitized manually when button 5 is pressed when in Stream mode.

	Button	Description
1	Dig point	Digitizes a new point
2	Resume	Resumes stream digitizing
3
4	End line	Ends and saves the current line