Edit Point

Allows interactive, graphical editing of an existing point in a VrOne workspace. Points may be changed, moved, copied or deleted.

Key-in	Description	Range
LAY=	Layer number	1-30001
INT=	Intensity	0-65535
RET=	Return number	1-5
RE#=	Number of returns	1-5
SCA=	Scan direction flag	0-1
EDG=	Edge flag	0-1
CLA=	Classification	0-31
SYN=	Synthetic flag	0-1
KEY=	Key point flag	0-1
ANG=	Scan angle	-90 to 90
FLT=	Flight number	0-255
SOU=	Point source Id	0-65535
TIM=	Gps Time	+/– 1.8e308
RED=	Red image channel	0-255
GRE=	Green image channel	0-255
BLU=	Blue image channel	0-255

The intensity value is the integer representation of the pulse return magnitude. This value is optional and system specific. Range: 0-65535

The Return Number is the pulse return number for a given output pulse. A given output laser pulse can have many returns which must be marked in sequence of return. The first return will have a Return Number of one, the second a Return Number of two, and so on up to five returns. Range: 1-5

The Number of Returns is the total number of returns for a given pulse. For example, a laser data point may be return two (Return Number) within a total number of five returns. Range: 1-5

The Scan Direction Flag denotes the direction in which the scanner mirror was traveling at the time of the output pulse. A bit value of 1 is a positive scan direction and a bit value of 0 is a negative scan direction (where positive scan direction is a scan moving from the left side of the in-track direction to the right side and negative the opposite). Range: 0-1

The Edge of Flight Line data bit has a value of 1 only when the point is at the end of a scan. It is the last point on a given scan line before it changes direction. 1=Point is edge of flight line.

Point classification. If a point has never been classified, this value must be set to zero. Range: 0-31

NOTE: The Vr database supports a Classification range of 0-255 although the current software complies with the LAS specification of 0-31.

0	Created, never classified
1	Unclassified
2	Ground
3	Low Vegetation
4	Medium Vegetation
5	High Vegetation
6	Building
7	Low Point (noise)
8	Model Key-point (mass point)
9	Water
10	Reserved for ASPRS Definition
11	Reserved for ASPRS Definition
12	Overlap Points
13-31	Reserved for ASPRS Definition

If set to 1, this point was created by a technique other than LiDAR collection, such as digitized from a photogrammetric stereo model. Range: 0-1

If set to 1, this point is considered to be a model key-point and thus generally should not be withheld in a thinning algorithm. Range: 0-1

The Scan Angle has a valid range from -90 to +90 and is the angle (rounded to the nearest integer in the absolute value sense) at which the laser point was output from the laser system including the roll of the aircraft. The scan angle is within 1 degree of accuracy from +90 to –90 degrees. The scan angle is an angle based on 0 degrees being nadir, and –90 degrees to the left side of the aircraft in the direction of flight. LAS range: +90 to -90. Vr range: -32767 to 32768

User-defined flight number. This attribute is not defined in the LAS specification. Range: 0-255

This value indicates the file from which this point originated. Valid values for this field are 1 to 65,535 inclusive with zero being used for a special case discussed below. The numerical value corresponds to the File Source ID from which this point originated. Zero is reserved as a convenience to system implementers. A Point Source ID of zero implies that this point originated in this file. This implies that processing software should set the Point Source ID equal to the File Source ID of the file containing this point at some time during processing. Range: 0-65535

GPS time at which the point was acquired in seconds. This attribute is available in VrPoint formats 1 and 3. Range: -1.8e307 to 1.8e307

The red image channel value associated with this point. This attribute is available in VrPoint formats 2 and 3. Range: 0-255

The green image channel value associated with this point. This attribute is available in VrPoint formats 2 and 3. Range: 0-255

The blue image channel value associated with this point. This attribute is available in VrPoint formats 2 and 3. Range: 0-255

	Button	Description
1	Id point	Identifies point to edit
2
3
4
5
6
7
8
9
*
0
#	End	Ends application

	Button	Description
1	Search	Saves the current point and returns to Lock on
2
3
4	Copy	Copies point
5
6	Move	Moves point
7	Change	Allows changing of point attributes using a dialog box
8
9	Delete	Deletes the current point after verification
*
0	Toggle snap	Toggles snap on/off
#	End	Ends application

Pressing button 7 (Change) displays the following dialog which allows the modification of the current point's attributes.

Each VrOne file uses one of the four Point Data Formats. These formats are based on the LAS specified data formats. The current Point Data Format number is displayed at the top of this dialog and attributes that are not supported by the current format are dimmed. See Parameters above for information on each attribute presented in this dialog.