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6 Replies and 26413 Views
Classification function disable 26413 6
Started by Deleted User
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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6 |
26413 |
by Deleted User 15 Jun 2020 07:05 PM |
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0 Replies and 5117 Views
Clipping a point cloud by height with ENVI Lidar 5.5 5117 0
Started by Deleted User
Hi, I am trying to perform a simple task: Clipping and export a point cloud (LAS format) from a forest area, by height. My point cloud is between 81- and 91-meters height. I want to produce a point cloud of the same area, also in LAS format, but only with the points that populate the zone between 83.50- and 84-meters height. What I am doing on ENVI Lidar 5.5: Process data > Enabling 'Produce Point Cloud' ( I choose the 'file name' and also 'product folder') > In “area defi...
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5117 |
06 Apr 2020 07:34 AM |
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5 Replies and 9434 Views
ENVi Lidar--estimating tree heights 9434 5
Started by Deleted User
I am a M.S. student and plan on using ENVI Lidar as part of my thesis research in estimating tree height/canopy cover from Lidar data. I am not sure if the information is proprietary, but is there a way to find out/better understand how ENVI Lidar calculates the tree heights as part of processing the data I cannot seem to find information on the algorithm. Any information would be helpful and thank you!
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9434 |
by MariM10 Oct 2019 10:23 AM |
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0 Replies and 24359 Views
ENVI LIDAR AUTOMATICALLLY PROCESSED LAZ FILES 24359 0
Started by Deleted User
PLEASE I UNDERSTAND THAT ENVI LIDAR WORKS AUTHOMATICALLY IN PROCESSING POINT CLOUDS, BUT WHICH ALGORITMS CAN WE DESCRIBE FOR THE VARIOUS PROCESS LIKE IN POINT CLOUD DETECTION, EXTRACTION AND CLASSIFICATION. I HAVE A LIDAR POINT CLOUD AND I NEED TO KNOW THE ALGORITMS USED FOR ALL THE STAGES OF ITS PROCESSING. AND ARTICLE TO MAKES REFERECE TO IN CASE OF A PUBLICATION
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24359 |
26 Dec 2017 09:50 AM |
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1 Replies and 5185 Views
RGB Data stretching 5185 1
Started by Deleted User
Hello, I have a set of point clouds extracted from two images and saved in LAZ format. Once imported in EnviLidar, the color intensity is very low and hence the point cloud appears almost black in the main window. Even if this is not a problem for the ortophoto (it can be stretched in ENVI), it is quite annoing when I try to do some QA on the processed data. Any suggestion to stretch data in order to get a proper visualization of color data Thank you, Luca
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5185 |
by MariM13 Sep 2017 02:38 PM |
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4 Replies and 5422 Views
Point cloud classification in a forest area 5422 4
Started by Deleted User
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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5422 |
by MariM14 Jul 2017 11:17 AM |
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8 Replies and 24542 Views
The vectors appear to be shifted one half pixel 24542 8
Started by Deleted User
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
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24542 |
01 Mar 2017 09:55 AM |
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6 Replies and 23917 Views
Differences in the elevations for the same laz file in EPSG:27700 and the British National Grid proj 23917 6
Started by Deleted User
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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6 |
23917 |
08 Aug 2016 09:57 AM |
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1 Replies and 23894 Views
Run ENVI filter tools on LiDAR Canopy Height rasters 23894 1
Started by Deleted User
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...
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23894 |
30 Jun 2016 08:47 AM |
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3 Replies and 23391 Views
Batch automation processing of .las 23391 3
Started by Deleted User
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.
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3 |
23391 |
26 Jan 2016 02:24 PM |
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2 Replies and 23213 Views
Using ENVI API to access functions? 23213 2
Started by Deleted User
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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23213 |
05 Jun 2015 07:01 PM |
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1 Replies and 23268 Views
how to generate density map 23268 1
Started by Deleted User
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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23268 |
31 May 2015 02:23 AM |
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1 Replies and 23076 Views
LiDAR E3De 23076 1
Started by Deleted User
I want to download software E3De. Can anyone suggest where can I find it.
thanks.
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23076 |
29 May 2015 11:57 PM |
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1 Replies and 22918 Views
ENVI LiDAR Query 22918 1
Started by Deleted User
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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22918 |
17 Mar 2015 11:49 AM |
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1 Replies and 23544 Views
Show Point Features option is greyed out 23544 1
Started by MariM
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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23544 |
11 Mar 2015 01:20 PM |
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1 Replies and 22965 Views
Crown location 22965 1
Started by Deleted User
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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22965 |
11 Dec 2014 01:57 PM |
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1 Replies and 22965 Views
Forest Density 22965 1
Started by Deleted User
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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22965 |
07 Apr 2014 02:11 AM |
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1 Replies and 23065 Views
Tree canopy. 23065 1
Started by Deleted User
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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23065 |
18 Feb 2014 02:28 AM |
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1 Replies and 22871 Views
take real advantage of LiDAR classification already in LAS files? 22871 1
Started by Deleted User
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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22871 |
18 Dec 2013 06:38 PM |
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4 Replies and 23441 Views
Error importing orthophoto 23441 4
Started by Deleted User
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.
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4 |
23441 |
24 Sep 2013 01:27 PM |