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Field |
Type |
Description |
Chinese Description |
Remark |
X |
Double |
X coordinate |
X |
The X, Y and Z values are stored as long integers. |
Y |
Double |
Y coordinate |
Y |
|
Z |
Double |
Z coordinate |
Z |
|
Intensity |
Unsigned16 |
Representation of the pulse return magnitude. |
強度: |
The intensity value is the integer representation of the pulse return magnitude. This value is optional and system specific. |
Amplitude |
Float |
This is the ratio of the received power to the power received at the detection limit expressed in dB. |
振幅 |
|
Reflectance |
Float |
Ratio of the received power to the power that would be received from a white diffuse target at the same distance expressed in dB. The reflectance represents a range independent property of the target. The surface normal of this target is assumed to be in parallel to the laser beam direction. |
反射率 |
|
ReturnNumber |
Unsigned8 |
Pulse return number for a given output pulse. A given output laser pulse can have many returns, and they must be marked in order, starting with 1. |
回波數 |
The Return Number is the pulse return number for a given output pulse. A given output laser pulse can have many returns, and they must be marked in sequence of return. |
NumberOfReturns |
Unsigned8 |
Total number of returns for a given pulse. |
回波數量 |
The Number of Returns is the total number of returns for a given pulse. |
ScanDirectionFlag |
Unsigned8 |
Direction at which the scanner mirror was traveling at the time of the output pulse. A 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. |
掃描方向:輸出脈衝時掃描鏡的行進方向。1爲正方向,從軌道內方向的左側向右側移動;0爲負方向,方向相反。 |
The Scan Direction Flag denotes the direction at which the scanner mirror was traveling at the time of the output pulse. |
EdgeOfFlightLine |
Unsigned8 |
Indicates the end of scan line before a direction change with a value of 1-0 otherwise. |
航線邊界 |
The Edge of Flight Line data bit has a value of 1 only when the point is at the edge of a scan. It is the last point on a given scan line before it changes direction or the mirror facet changes. Note that this field has no meaning for 360° Field of View scanners (such as Mobile LiDAR scanners) and should not be set. |
Classification |
Unsigned8 |
ASPRS classification, 0 for no classification. See LAS specification for details. |
類別 |
This field represents the "class" attributes of a point. If a point has never been classified, this byte must be set to zero. |
ScanAngleRank |
Float |
Angle degree at which the laser point was output from the system, including the roll of the aircraft. The scan angle is based on being nadir, and -90 the left side of the aircraft in the direction of flight. |
掃描角度:輸出的激光點角度,包括飛機的橫滾角。掃描角度基於最低點,而-90則是飛機在飛行方向上的左側。 |
The Scan Angle Rank is a signed one-byte with a valid range from -90 to +90. |
UserData |
Unsigned8 |
Unspecified user data. |
用戶數據:未指定的用戶數據。 |
This field may be used at the user's discretion. |
PointSourceId |
Unsigned16 |
File source ID from which the point originated. |
點源號 |
This value indicates the file from which this point originated. Valid values for this field are 1 to 65535 inclusive with zero being used for a special case discussed below. |
Red/Green/Blue |
Unsigned16 |
Red/Green/Blue image channel value. |
紅/綠/藍色通道值 |
The Red/Green/Blue image channel value associated with this point. |
GpsTime |
Double |
GPS time that the point was acquired. |
GPS時間 |
The GPS Time is the double floating point time tag value at which the point was acquired. |
InternalTime |
Double |
Scanner's internal time when the point was acquired, in seconds. |
掃描器的內部時間 |
|
OffsetTime |
Unsigned32 |
Milliseconds from first acquired point. |
獲取第一個點的毫秒數 |
|
IsPpsLocked |
Unsigned8 |
The external PPS signal was found to be synchronized at the time of the current laser shot. |
發現外部PPS信號在當前激光發射時已同步 |
|
StartPulse |
Signed32 |
Relative pulse signal strength. |
相對脈衝信號強度 |
|
ReflectedPulse |
Signed32 |
Relative reflected pulse signal strength. |
相對反射的脈衝信號強度 |
|
Pdop |
Float |
GPS PDOP (dilution of precision). |
PDOP |
|
Pitch |
Float |
Pitch in degrees. |
橫滾角 |
|
Roll |
Float |
Roll in degrees. |
俯仰角 |
|
PulseWidth |
Float |
Laser received pulse width (digitizer samples). |
激光接收的脈衝寬度(數字化樣本) |
|
Deviation |
Float |
A larger value for deviation indicates larger distortion. |
偏差:大的偏差值代表大的失真。 |
|
PassiveSignal |
Signed32 |
Relative passive signal. |
無源信號:相對無源信號。 |
|
BackgroundRadiation |
Float |
A measure of background radiation. |
背景輻射 |
|
PassiveX |
Double |
Passive X footprint. |
||
PassiveY |
Double |
Passive Y footprint. |
||
PassiveZ |
Double |
Passive Z footprint. |
||
XVelocity |
Double |
X Velocity. |
X 速度 |
|
YVelocity |
Double |
Y Velocity |
Y 速度 |
|
ZVelocity |
Double |
Z Velocity. |
Z 速度 |
|
Azimuth |
Double |
Scanner azimuth. |
方位角:掃描器的方位角。 |
|
WanderAngle |
Double |
Wander Angle. |
漂移角 |
|
XBodyAccel |
Double |
X Body Acceleration. |
X 加速度 |
|
YBodyAccel |
Double |
Y Body Acceleration. |
Y 加速度 |
|
ZBodyAccel |
Double |
Z Body Acceleration. |
Z 加速度 |
|
XBodyAndRate |
Double |
X Body Angle Rate. |
X 角速度 |
|
YBodyAndRate |
Double |
Y Body Angle Rate. |
Y 角速度 |
|
ZBodyAndRate |
Double |
Z Body Angle Rate. |
Z 角速度 |
|
Flag |
Unsigned8 |
Flag |
||
Mark |
Unsigned8 |
Mark |
||
Alpha |
Unsigned16 |
Alpha |
||
EchoRange |
Double |
Echo Range |
回波幅度 |
|
ScanChannel |
Unsigned8 |
Scan Channel |
掃描頻道 |
Scanner Channel is used to indicate the channel (scanner head) of a multi-channel system. |
Infrared |
Unsigned16 |
Infrared |
紅外的 |
|
HeightAboveGround |
Double |
Height Above Ground |
與地面高差 |
|
ClassFlags |
Unsigned8 |
Class Flags |
類別標誌 |
|
LvisLfid |
Unsigned64 |
LVIS_LFID |
||
ShotNumber |
Unsigned64 |
Shot Number |
||
LongitudeCentroid |
Double |
Longitude Centroid |
||
LatitudeCentroid |
Double |
Latitude Centroid |
||
ElevationCentroid |
Double |
Elevation Centroid |
||
LongitudeLow |
Double |
Longitude Low |
||
LatitudeLow |
Double |
Latitude Low |
||
ElevationLow |
Double |
Elevation Low |
||
LongitudeHigh |
Double |
Longitude High |
||
LatitudeHigh |
Double |
Latitude High |
||
ElevationHigh |
Double |
Elevation High |
||
PointId |
Unsigned32 |
An explicit representation of point ordering within a file, which allows this usually-implicit information to be preserved when reordering points. |
||
OriginId |
Unsigned32 |
A file source ID from which the point originated. This ID is global to a derivative dataset which may be aggregated from multiple files. |
||
NormalX |
Double |
X component of a vector normal to surface at this point. |
法向量的X分量 |
|
NormalY |
Double |
Y component of a vector normal to surface at this point. |
法向量的Y分量 |
|
NormalZ |
Double |
Z component of a vector normal to surface at this point. |
法向量的Z分量 |
|
Curvature |
Double |
Curvature of surface at this point. |
曲率 |
|
Density |
Double |
Estimate of point density. |
密度 |
|
Omit |
Unsigned8 |
Used to shallowly mark a point as being omitted without removing it. |
用於標記點而不刪除。 |
|
NNDistance |
Double |
Distance metric related to a point's nearest neighbors. |
最鄰近距離 |