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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

In LiDAR [light detection and ranging], a data void is a gap in the point cloud coverage, caused by surface non-reflectance of the LiDAR pulse, instrument or processing anomalies or failure, obstruction of the LiDAR pulse, or improper collection flight planning.  2, record 1, English, - data%20void

Record number: 1, Textual support number: 1 OBS

Any area greater than or equal to four times the aggregate nominal pulse spacing (ANPS) squared, measured using first returns only, is considered to be a data void.  2, record 1, English, - data%20void

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Dans le créneau des lidars [détection et télémétrie par ondes lumineuses], un vide de données est une lacune au niveau de la couverture du nuage de points provoquée par la non-réflexion de l'impulsion lidar à la surface, une anomalie ou une défaillance de l'instrument ou du processus de traitement, l'obstruction de l'impulsion lidar ou une mauvaise planification de la collecte en vol.  1, record 1, French, - vide%20de%20donn%C3%A9es

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

A common measure of the density of a lidar [light detection and ranging] dataset... NPD is the typical or average number of pulses occurring in a specified areal unit. The NPD is typically expressed as pulses per square meter(pls/m2). This value is predicted in mission planning and empirically calculated from the collected data, using only the first(or last) return points as surrogates for pulses... The term NPD is more commonly used in high-density collections(greater than 1 pls/m2), with its inverse, nominal pulse spacing(NPS), being used in low-density collections(less than or equal to 1 pls/m2).  2, record 2, English, - nominal%20pulse%20density

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

A common measure of the density of a lidar [light detection and ranging] dataset... NPS the typical or average lateral distance between pulses in a lidar dataset, typically expressed in meters and most simply calculated as the square root of the average area per first return point. This value is predicted in mission planning and empirically calculated from the collected data, using only the first(or last) return points as surrogates for pulses... The term NPS is more commonly used in low-density collections(greater than or equal to 1 meter NPS) with its inverse, nominal pulse density(NPD), being used in high-density collections(less than 1 meter NPS).  2, record 3, English, - nominal%20pulse%20spacing

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

La densité de points LiDAR recueillis est fonction des paramètres de vol, des réglages du capteur, du nombre maximal de retours (points) par impulsion LiDAR et des caractéristiques de la couverture terrestre qui font l’objet des levés. Dans le présent document, l’espacement nominal des impulsions se rapporte précisément aux impulsions et non aux points.  1, record 3, French, - espacement%20nominal%20des%20impulsions

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A... nominal pulse density that expresses the total expected or actual density of pulses occurring in a specified unit area resulting from multiple passes of the light detection and ranging(LiDAR) instrument, or a single pass of a platform with multiple LiDAR instruments, over the same target area.  2, record 4, English, - aggregate%20nominal%20pulse%20density

Record number: 4, Textual support number: 1 CONT

In all other respects, ANPD is identical to nominal pulse density (NPD). In single coverage collection, ANPD and NPD will be equal.  2, record 4, English, - aggregate%20nominal%20pulse%20density

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Dans le présent guide d’orientation, la densité et l'espacement des impulsions lidar dans la ZICD (zone d’intérêt pour la collecte des données) sont définis comme étant la densité nominale globale des impulsions (DNGI) et l'espacement nominal global entre les impulsions (ENGI). La densité / espacement de l'impulsion globale est appelée une densité / espacement de l'impulsion globale, de sorte qu'une bande peut chevaucher d'autres bandes complètement, partiellement ou pas du tout.  2, record 4, French, - densit%C3%A9%20nominale%20globale%20des%20impulsions

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

A... nominal pulse spacing that expresses the typical or average lateral distance between pulses in a LiDAR [light detection and ranging] dataset resulting from multiple passes of the LiDAR instrument, or a single pass of a platform with multiple LiDAR instruments, over the same target area.  2, record 5, English, - aggregate%20nominal%20pulse%20spacing

Record number: 5, Textual support number: 1 CONT

In all other respects, ANPS is identical to nominal pulse spacing (NPS). In single coverage collections, ANPS and NPS will be equal.  2, record 5, English, - aggregate%20nominal%20pulse%20spacing

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 CONT

Espacement nominal global entre impulsions (ENGI) : Variante de l’espacement nominal entre les impulsions qui exprime la distance latérale type ou moyenne entre les impulsions dans un ensemble de données lidar découlant de survols multiples de l’instrument de détection et de télémétrie par ondes lumineuses (lidar), ou d’un survol unique d’une plateforme comprenant plusieurs lidars, au-dessus d’un même secteur. À tous les autres égards, l’ENGI est identique à l’espacement nominal entre les impulsions (ENI).  1, record 5, French, - espacement%20nominal%20global%20des%20impulsions

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 OBS

A scanning lidar that emits a pulse of laser light... into the atmosphere and utilizes Raman scattering in order to measure three return wavelengths, including backscatter due to elastic... nitrogen... and water... signals.  2, record 6, English, - Raman%20lidar

Record number: 6, Textual support number: 2 OBS

lidar: A system for detecting the presence of objects or ascertaining their position or motion which works on the principle of radar, but uses laser radiation instead of microwaves.  3, record 6, English, - Raman%20lidar

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 CONT

Le lidar Rayleigh mesure simplement l'intensité de l'onde rétrodiffusée [...] Le lidar Raman mesure aussi l'intensité de l'onde rétrodiffusée, mais cette fois par diffusion Raman.  2, record 6, French, - lidar%20Raman

Record number: 6, Textual support number: 1 OBS

lidar : système ou appareil de détection qui émet un faisceau laser et en reçoit l'écho, permettant de déterminer la distance d'un objet.  3, record 6, French, - lidar%20Raman

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

An instrument combining a pulsed laser transmitter and optical receiver (usually a telescope) with an electronic signal processing unit used for the detection and ranging of various distant targets in the atmosphere, analogous to the principles of operation of microwave radar.  6, record 7, English, - lidar

Record number: 7, Textual support number: 1 CONT

The lidar technique operates on the same principle as radar; in fact, it is sometimes called laser radar. The principal difference between lidar and radar is the wavelength of the radiation used. Radar uses wavelengths in the radio band whereas lidar uses light, that is usually generated by lasers in modern lidar systems.  7, record 7, English, - lidar

Record number: 7, Textual support number: 2 CONT

There are three basic generic types of lidar : range finders, DIAL, and Doppler lidars. Rande finder lidars are the simplest lidars. They are used to measure the distance from the lidar instrument to a solid or hard target Differential Absorption Lidar(DIAL) is used to measure chemical concentrations(such as ozone, water vapor, pollutants) in the atmosphere. Doppler lidar is used to measure the velocity of a target High-resolution DEMs with vertical accuracy as good as 10 cm can be created with Lidar. Lidar is also better able to map bare earth elevations in forested or vegetated areas than other methods because only a single laser pulse needs to be able to reach between trees and the ground.  8, record 7, English, - lidar

Record number: 7, Textual support number: 1 OBS

lidar: Coined word for light detection and ranging.  6, record 7, English, - lidar

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Combinaison d'un laser et d'un récepteur accolés, destinée à étudier les échos produits par les particules de l'atmosphère sur des ondes visibles ou infrarouges.  5, record 7, French, - lidar

Record number: 7, Textual support number: 1 OBS

La détection se fait par des cellules optiques suivies de photomultiplicateurs.  6, record 7, French, - lidar

Record number: 7, Textual support number: 2 OBS

Le lidar sert également à la localisation et à la poursuite télémétrique d'engins dans le ciel.  7, record 7, French, - lidar

Record number: 7, Textual support number: 3 OBS

lidar : acronyme dérivé du terme anglais «light detection and ranging» qui veut dire «détection et télémétrie par ondes lumineuses».  8, record 7, French, - lidar

Record 7,  Textual support,  Spanish

Record number: 7, Textual support number: 1 DEF

Aparato de detección y localización por ondas luminosas.  1, record 7, Spanish, - lidar