Performing stand counts using multispectral data and index thresholding in QGIS
Ғылым және технология
In this video, we'll be looking at detecting trees using multispectral data in QGIS. The tools and techniques we'll use are perfect for a wide range of classification tasks.
To download the data set used in this video, click on the following link: static.micasense.com/samples/...
Пікірлер: 23
Great explanation! Very helpful. Thanks!
Well done!
Thank you a lot. That was very informative and helpful. Please do more tutorials about using deep learning to count trees and identify species, height, etc.
Genial 👍👍
Hi, I have raw datas of micasense camera and get them processed using pix4d mapper, using your method which data should I use? I have blue, green, ndvi, nir, red & red edge here.
This was a great tutorial, thank you! I wonder if the automated workflow you spoke about in the end of the video has been released yet?
Would this methodology work to distinguish different tree spiecies from each other in a more dense stand?
@MicaSense
2 жыл бұрын
Yes, it would
Great video! Super helpful and well explained. From where did you source your data? Thanks!
@MicaSense
2 жыл бұрын
Hi Lukas, We used a data set we captured with one of our sensors for this video tutorial. If you are looking for sample data sets to use in QGIS, I suggest you visit our website, and under products, you'll find an option for Sample Datasets; pick the one from the sensor you would like to test out. micasense.com/ If you have any further questions, please get in touch with our support team at support@micasense.com
@dalerobberts6793
2 жыл бұрын
Hi Lukas, when I try and apply the filtered layer using sieve and a threshold of 5 I just get a white box with a black border. The entire area where the fine filtered area is just turns to a white block. I have copied your methods completely and tried it a number of times. Any idea why it is doing this. QGIS vs 2.4.1
Great video! May be a little faster but super usefuly. Still wondering about your raster calculation in min 4:50 of the video. ¿?
@MicaSense
2 жыл бұрын
Hi Eduardo, what is your specific question? Please send us an email to support@micasense.com so we can further assist you :)
What are the specs of your computer? The processes seem very fast for such large rasters.
Hi @Micasense when I try and apply the filtered layer using sieve and a threshold of 5 I just get a white box with a black border. The entire area where the fine filtered area is just turns to a white block. I have copied your methods completely and tried it a number of times. Any idea why it is doing this. QGIS vs 2.4.1
@MicaSense
2 жыл бұрын
Hi Dale! Thanks for reaching out with your concern about filtered layers not working properly. Please get in touch with our support team so we can take a closer look at your situation. They can be reached here: support.micasense.com/hc/en-us/requests/new
@soundoftensuns9802
Жыл бұрын
Hi, try seting your min =0 and max =1 to your sieve after creating it
@dalerobberts6793
Жыл бұрын
@@soundoftensuns9802 Hi, happy new year. Many thanks, will give that a try and see how it goes. Appreciate your feedback.
4:50 What character is placed between the brackets? (NIR >= 6000) ??? (osavi > 0.88) != 0 = 1 Thanks for help 😊
@avexdronesagricolas3549
6 ай бұрын
It's *
Can you please share the formula you've used? eg. osavi etc...
@MicaSense
2 жыл бұрын
We used the typical osavi formula: (NIR - red) / (NIR + red + L) * (1 + L) L = 0.16
@bvegas
2 жыл бұрын
@@MicaSense Actually that formula was not used to compute OSAVI in this demo. Only (NIR - R)/(NIR + R) was used.