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Questions tagged [canopy-height-model]

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0
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1answer
73 views

Equation in Google Earth Engine

Recently I have derived a correlation equation between biomass and canopy height using sample tree parameters from field. The equation is Biomass = 0.0001(Height)^ 2.895. I tried to ...
0
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0answers
103 views

Finding local maxima with a variable window size in Python

I am trying to find local maxima in a DEM (canopy height model) that represents tree tops. I can do this with a fixed window size. However I would rather have a variable window size based on the ...
0
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1answer
375 views

Normalizing a digital surface model? [closed]

I am trying to generate a normalized DSM by subtracting the original DSM (oDSM) from the DTM. To generate the DTM I had to first use a median filter on the oDSM (remove noise) and then use a ...
-2
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2answers
234 views

Calculating canopy height in ArcGIS Desktop without LiDAR data?

I am currently trying to assess vegetation height for my study area. I am trying to use this guide: http://desktop.arcgis.com/en/arcmap/10.3/manage-data/las-dataset/lidar-solutions-estimating-forest-...
2
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1answer
39 views

How does MERIS collect vegetation height data?

In GlobCover 2005 and 2009 project, the sensor used for spectral data collection was MEdium Resolution Imaging Spectrometer (MERIS). It observes the Earth in 15 spectral bands in visible and near ...
0
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1answer
386 views

Calculating forest canopy density and advanced vegetation index in ArcGIS Raster Calculator?

While performing raster calculator operation in ArcGIS for Advanced Vegetation Index ( in calculating forest canopy density), the results show only 2 values i.e high (1) and low ( 0), instead of a ...
2
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2answers
95 views

Getting a flat surface from DSM for height calculation?

I have a DSM done trough photogrammetry with the software Agisoft Photoscan of a forestry experiment and I need to accomplish an analysis of the mean height from it. My problem is that the profile has ...
1
vote
1answer
406 views

Generating Canopy Height Model (CHM) with Quick Terrain Modeler?

I currently looking forward to process LiDAR point clouds (forest data) using Quick Terrain Modeler (QTM), but is it possible to create Canopy Height Model directly using the software?
3
votes
2answers
400 views

Finding tree canopy width using PDAL?

I want to classify (and separate) houses from trees (high vegetation) in point cloud data using PDAL. I use height filter for this purpose. Our high Vegetation lies in the range between 5 and 10 ...
2
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1answer
201 views

Height and X Y coordinates of points on Google Earth

How can I get information on height and X,Y coordinates using Google Earth data for a given terrain?
2
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1answer
142 views

Heat mapping forestry height trends using ArcGIS?

I am using ArcGIS and have access to Spatial and 3D Analyst extensions. I've attached a link to a picture of a 1m raster “canopy height model” which was derived from LiDAR and displays tree heights (...
2
votes
3answers
889 views

Creating a Canopy Height Model (CHM) image from a LAS file on Mac?

Main question: Is there a way of creating a Canopy Height Model from a LAS file using Mac (not wine etc)? I also would like to batch process a lot of LAS files the same way. I should mention that I ...
2
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4answers
1k views

Identifying individual trees and segmenting crowns from LiDAR CHM data?

I have a classified LiDAR point cloud for an area of 250*250 square meter, with 1 meter resolution. It has a 5 lakhs points with an average point density of 9 (means around 9 points within a pixel). ...
3
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2answers
2k views

Canopy Height Model of LiDAR data in QGIS?

I have a DTM and DSM files. I want to develop a Canopy Height Model (CHM) in QGIS. Is it possible?