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Queensland LiDAR capture projects - Department of … · Title: Queensland LiDAR capture projects Author: Queensland Department of Natural Resources and Mines Subject: Index map of
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As capture d a nd or mana g e d byTopog ra phic Data Mana g e me ntLand and Spatia l InformationLast Revise d : 14 Aug ust 2017
@ The State of Que e nsland , Depa rtment of Natura l Resource s and Mines, 2017For furthe r information conta ct the:Senior Spatia l Information Office r,Spatia l Information P rod uct De live ry,Land and Spatia l Information
Dept of Natura l Resource s and MinesEma il: Discove ry@d nrm.qld .g ov.a u
Completed2 points per square metre0.25 metre contours1 metre DEM
On Program2 points per square metre0.25 metre contours1 metre DEM
NOTE: Multiple proje cts ove r the sa me a re a with d iffe re nt ca pturespe cifications ma y e xist. The footprints of the ind ivid ua l LiDARtiles can be fre e ly d ownloa d e d fromhttp://qld spatia l.information.qld .g ov.a u/cata log ue /custom/se a rch.pa g e ?q=lid a r+footprints
4 points per square metre0.25 metre contours1 metre DEM
2 points per square metre0.5 metre contours5 metre DEM
Attribute s within this d a tase t includ e capture proje ct, ca pture d a te s,d a ta forma ts, horizonta l a nd ve rticle a ccura cy. Whe re mulitple proje ctsexist ove r an a re a , the use r can d rill d own to the d iffe re nt proje cts.
Lid a r (lig ht d e te ction a nd ra ng ing ), a lso known as LADAR (Lase r a ltimetry) or ALS (Airbourne Lase r Scanning ) is a te chniquetha t uses lase r lig ht to d ense ly sample the surfa ce of the e a rth, prod ucing hig hly a ccura te thre e -d ime nsiona l coord ina te s- ofte n ca lle d a point cloud - of the shape of the e a rth and its surfa ce cha ra cte ristics.The coord inates of the ta rg e t obje cts a re compute d from the time d iffe re nce be tw e en the la se r pulse be ing e mitte d ,re fle cte d by a n obje ct and returne d to the sensor, the ang le a t which the pulse w as fire d and the a bsolute loca tion of the se nsoron or above the surfa ce of the e a rth.Data forma ts g e ne ra te d from the point cloud d a ta and ma na g e d by Land a nd Spatia l Information usua lly comprise :• Cla ssifie d LAS (point cloud fe a ture s a re classifie d (e .g . g round , build ing , ve g e tation,e tc)• Dig ita l Ele va tion Mod e ls• Contours