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4 Replies and 250 Views Point cloud classification in a forest area  250  4 Started by  Lucas ROSA Hello. My name is Lucas and I'm a beginner user of ENVI LiDAR. I was wondering if anyone here could help me with point cloud classification. I need to classify a forest area in 3 levels (strata): trees (above 1.3 meters); shrubs (between 0.75 m and 1.29m) and grasses (under 0.75m), each one represented by a different color. I read some guides but isn't clear for me yet how to do it in Envi lidar, can someone give me this little help or indicate a specific guide/tutorial
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by  Mari MinariJump to last post
14 Jul 2017 11:17 AM
8 Replies and 406 Views The vectors appear to be shifted one half pixel  406  8 Started by  Paulo Olivas Hi there, I am trying to generate DSM (1m) and DEM (2m) from LIDAR data, but the problem I am experiencing is that the resulting DSM and DEM have one half pixel shifted. I tried to change extent in multiple ways but I was not successful. Any suggestions. Paulo
8 406
01 Mar 2017 09:55 AM
6 Replies and 128 Views Differences in the elevations for the same laz file in EPSG:27700 and the British National Grid proj  128  6 Started by  Hakim Benoudjit Hello, I've been working with the freely-available LiDAR DEM for the UK (UK LiDAR DEM) which uses the British National Grid projection (EPSG:27700) and is available in laz format (compressed laz files). I've found one issue with it: If I open the laz file, and in the Convert Format window set the input projection system to EPSG:27700, the elevations are different from when I click on Advanced and select the British National Grid projection. Although both projections are supposed to be the same...
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08 Aug 2016 09:57 AM
1 Replies and 129 Views Run ENVI filter tools on LiDAR Canopy Height rasters  129  1 Started by  Jamie Ervin Hi, I originally posted this in the ENVI forum, but I'm re-posting it here because there seems to be a bug in that forum (thousands of posts in a foreign language are making the forum impossible to follow). I'm new to ENVI software, but I've got one simple thing that I'm hoping to do! I'm trying to perform a texture analysis on a series of LiDAR-generated canopy height models in either ENVI or ArcGIS. The height model rasters are in ArcGIS GRID format, and I'm hoping to a...
1 129
30 Jun 2016 08:47 AM
3 Replies and 119 Views Batch automation processing of .las  119  3 Started by  Elton Gjata Hi, I'm attempting to Batch process LAS tiles through Envi Lidar. I can successfully run Envi Lidar and process Ortho, DEM, DSM, Trees, Power Lines and Contours. Is it possible to run this script automatically for every .las file in a certain directory Thanks, Elton G.
3 119
26 Jan 2016 02:24 PM
2 Replies and 92 Views Using ENVI API to access functions?  92  2 Started by  jareds1 Hi all, I'm creating IDL scripts to allow the automation and scheduling of turning LAS data into raster data, and am fairly new to IDL scripting. It can be done with these ( http://bcal.boisestate.edu/tools/lidar)extensions from Boise Idaho with the ENVI interface pulled up, but I want to be able to do this with ENVI headless. Can I use a part of the ENVI API and functions to call an extension, or do I need to re-write the source code of the extensions Thanks!
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05 Jun 2015 07:01 PM
1 Replies and 87 Views how to generate density map  87  1 Started by  DEEPTI YADAV How to generate density map from lidar data ...can it be done using ENVI or any other tool. I read somewhere about E3Dm but not able to find this software. Please suggest any method or tool to generate it and output it in tiff format.
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31 May 2015 02:23 AM
1 Replies and 91 Views LiDAR E3De  91  1 Started by  DEEPTI YADAV I want to download software E3De. Can anyone suggest where can I find it. thanks.
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29 May 2015 11:57 PM
1 Replies and 78 Views ENVI LiDAR Query  78  1 Started by  Kate Kear I had a question regarding ENVI LiDAR, in the ENVI window while viewing the point could or the vectors for various features there is an option to save the view as a picture in powerpoint or as a .bmp image. I wanted to know if it is possible to define the resolution (300 dpi or more) for the publication purposes and how is it done. The current dpi I am seeing is around 72.
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17 Mar 2015 11:49 AM
5 Replies and 79 Views Classification function disable  79  5 Started by  Maoqi Sun I was exploring the tutorial video on ENVI website and found that processing data will classify the point cloud automatically.However, I found that there is no function as "show point features as classification" in my software. I am wondering why is it disabled in my version ofsoftware I've attached the screenshot.
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11 Mar 2015 02:23 PM
1 Replies and 81 Views Show Point Features option is greyed out  81  1 Started by  Mari Minari After I import and process my Lidar data I would like to use Show Point Features to color the points in different ways. One option, Show Point Features by Source ID, is greyed out and not available for my dataset. Why is this
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11 Mar 2015 01:20 PM
1 Replies and 82 Views Crown location  82  1 Started by  MichalB Is it possible to calculate automatically the height of crown location I've marked it by the red line on the picture linked below. In this way I could calculate the cone volume which can (more or less) represent crown volume. I can not find this information in the shape file attribute table. Crown picture
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11 Dec 2014 01:57 PM
1 Replies and 60 Views Forest Density  60  1 Started by  Jevgenijs Filipovs Hello, I have already classified .las files. I want to use ENVI LIDAR to get Tree height raster and Forest density raster. I processed the data with default settings and then in the toolbox window pressed the Forest Density code. I got Tree Height raster but Forest density raster is empty, i calculated raster statistics and it's 0. Could suggest something Cheers, Jevgenijs
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07 Apr 2014 02:11 AM
1 Replies and 70 Views Tree canopy.  70  1 Started by  Jevgenijs Filipovs Hi, Is a possibility with ENVI lidar create forest canopy shapes If is, please describe. And what are the maximum number of point possible load into ENVI lidar Best regards
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18 Feb 2014 02:28 AM
1 Replies and 78 Views take real advantage of LiDAR classification already in LAS files?  78  1 Started by  Bruce Simonson Totally new to this product (installed today). Have loaded a sample set of LAS files, things look fine. Two quick questions: 1) Tried to show points, by classification. When ENVI-LiDAR displays the classification already in the LAS files (which appear to be very good to me), I get a gray-scale display. Is there any way to control the colorization of the existing point classifications in the source LAS files 2) Ran the automated processing, and got ENVI-LiDAR to pick out some of the featu...
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18 Dec 2013 06:38 PM
4 Replies and 66 Views Error importing orthophoto  66  4 Started by  Oscar Castillo I am trying to import an orthophoto (.tif) and a popup message appears with this: Error fetching data for field "BitsPerSample" Thanks for your help! Oscar C.
4 66
24 Sep 2013 01:27 PM
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