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Landsat 8 Image Classification using QGIS
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- Опубликовано: 5 окт 2020
- In this tutorial, you will learn how to classify Landsat 8 images using the Semi-Automatic Classification Plugin (SCP) of QGIS. The tutorial consists of parts pertaining to using different Landsat spectral band combination for highlighting key landcover classes, specification of training inputs for both ‘Classes’ and ‘Macro-classes’ and finally deriving the completed landcover raster using the SCP plugin.
Dear Sir, I recently came across your insightful RUclips tutorial on Landsat 8 Image Classification using QGIS, and I truly appreciate the clear and informative content you provided. Your step-by-step guidance was immensely helpful. I would love to see similar tutorials for Landsat 8 Image Classification using ArcGIS and RStudio. If you've already covered these topics, could you please share the links in the comments section? Your expertise is invaluable, and your tutorials make complex processes accessible to learners like me. Thanks again for your dedication to sharing knowledge!
Just to add when RGB is 4-3-2 it's natural colour or True composite. Anything other than that like 5-4-3 (colour infrared) would be False Colour Composite (FCC).
Very nice tutorial. Really helpful. Thanks
Can you please make a video that goes further, converting this file into vector and then calculating the surface area of each elements?
This is such a wonderful presentation, absolutely wonderful job. Your patience and articulation makes this work much easier. Thank you, you have earned yourself a subscriber.
you’re literally the only person saving me on this topic 😭 thank you so much 😭😭😭😭
I'd like to thank you so much for the nice tutorial you've come up with on SCP. For me, it's just the beginning of a long journey, but now I feel encouraged to move forward. Keep posting more you're an excellent coach!
You are welcome :)
Vim aqui só pra te dizer que você tem um grande fã no Brasil, meus parabéns pelo incrível tutorial 👏👏
Thank you so much brother for such a great tutorial!
Please make some tutorials on Landsat 8 unsupervised image classification, cloud masking, accuracy assessment, and LULC change prediction with CA-Markov Model.
This is absolutely brilliant. It is easy to understand and follow. Thank you so much for this. I am more knowledgeable in this now than before.
Thanks man. I like your step by step explanation and also you have a nice voice.
Thanks :)
I’ve downloaded the zip file and I found xml format (not mtl) I’ve tried to convert it to .txt but it doesn’t work . Could please explain how can I risolve this problem? Thank you so much
I feel at 8.37 minutes wavelength setting is not correct...as it is for 2,3,4,5,6,7 not for 1... Please see in your video center wavelength shows 7.0; that is not correct. But I must appreciate that it is excellent guide
HI, Everything was going good. I was following all of the steps but during 26:28 the option you go for i.e classification. I am not getting this option displayed there in its place. I have only option of Home, Training inputs and ROI. Do you have any idea to make it show up? Thanks
Same thing goes for me. Have you located your classification already this time?
Thank you sir.....this is such a wonderful explanation, keep it and cheers🖒
Glad you liked it
Thank you very much for this.
Please, I tried the tutorial but whenever I do the reflectance from the clip files, band 1 is always omitted! I have tried all I know, including upgrading Qgis to the latest version still no success. Please I will need your help here.
From one of your devouted students!
Same here
According to the "Frequently asked questions" of the plugin, there are some bands that the plugin avoids in the pre-processing for a semi-automatic classification.
"Which image bands should I use for a semi-automatic classification? In general, it is preferable to avoid thermal infrared bands. If you are using Landsat 4, 5 or 7 you should select bands: 1, 2, 3, 4, 5, 7 avoiding band 6 that is thermal infrared; for Landsat 8 you should select bands: 2, 3, 4, 5, 6, 7. Landsat 8 band 1 is generally avoided because it is very similar to the blue band and it is mainly used for coastal aerosol study. Landsat thermal infrared band is excluded from classifications because values are mainly related to object temperature."
Maybe he is using another version of the plugin and thats the reason why he still have the Band 1. Anyways, I think that we can use the original Band 1 in the furthing processus.
@@armandocruz6379 This worked perfectly thank you
Hi mate, i have a question, i don't have the classification option below the training input, do you know why it could be? i have Qgis 3.16, cause of this problem i can't go on with the process :c
Mind-blowing explanation brother
Thank you so much for this tutorial. Could you also explain how to impove the accuracy of the classification?
i cannot find classification in scp dock:( instead i have roi options. what should i do?
Go into the SCP option (next to processing) -band processing-classification
There is no option like landsat available under the prepossessing menu, please help. Do we have to install another plugin for that
Thank you for this video, can you tell me wich type of image you download ? I tried GeoTIFF but it is very long..
Eagarly waited, Thanks for tutorial.🙏
mero klms ley kaam garena k vai yr
Thank you for your video. When it comes to RT_clip bands I can't get file for the first band (B1). Only next six bands. What can be the reason of such difference with the result of SCP in your case?
same problem
Same issue
@@ARIJITGEOLOGY I figured it out. There should be some option to active them while loading the Reflectance Bands from Clipped ones. As I was working using Sentinel - 2A satellite imagery, I was able to activate it. I couldn't able to find while working with LANDSAT imagery tho. at 09:37 that guy has an option only to blue and green bands option. May be we should check that option to get remaining bands.
@@suhisuhaas3408 But there is no "blue and green band " option in scp .I have been using QGİS 3.18.I have same problem with you...Did you solve it?
I've been getting same problem, bro@@ArcGIS88 , no option for blue and green band in QGIS 3.10 .. i wish some people could give explanation for it..
Thank you very much sir. May God bless you.
I like the voice. It is soo clear and addictive😊
Thanks :)
Hello, i have a problem while i'm making the reflections. The process is stucked on 60% . I don't know what i should do . Please help, thanks
While doing the reflectance part, one of my bands(band 1) got vanished. Why this is so?
Can you manage to resolve the problem? Because I have the same issue
I am also having the same problem. Have you found a solution?
@@irmak3667 Idem, same problem
Lovely and very informative video. Thanks. Kindly make the next video on converting it in to vector and calculating amount of the given classes please. Kindly also make a video over authenticity check of the whole classification in case we need to do it for scientific publication please
Oh my God! You so good. I am lucky i jumped on this tutorial
@geodelta labs
I have tried this, but in middle of saving MC id it shows error and my laptop getting shutdown.
The nicer tutorial for this tool. Thank you dude!
Thank you so much for these wonderful tutorials. Please can you do a new tutorial for the updated earthexplorer website? it's difficult to get this image as you did with the updated website. thank you
Thank you very for your all tutiorials, I am very glad this
I like this tutorial, but what if my study area, for example, is composed of two images NE and SW, how can we combine the both images (NE-SW) to analyze them with the Scp method?
Hey🙌🏻 i think i have the same problem as you at 8:56. I can‘t choose the folder „clip“ for „directory containing landsat bands“. No meta data or bands are found. Do you habe any solution? Cause you skipped the problem and everything worked.
I am not able to create more than two ROIs even if I am holding down control key. What's the problem?
I would like to thank you so much, but I have a question. The Landsat 5 TM can be used for the SCP for classification?
Really helpful. Can you upload the next tutorial on how we can do image classification using advanced ML algorithms in python??
First of all thank you this helpful tutorial..My data set is belong to Landsat 8 and also Level-2 and Collection-2. So what should i do those data set? Which stage should I start from? thank you so much :)
Is it possible to create a ground hillshade type model (to see ground features) with just DEM and Landsat 8 (for when NO LiDAR is available)? For example, do math on a DEM based on a classification mask? I know that LiDAR will have less holes because a laser gets to the ground more than a Landsat band would, but that is ok if it averages out the parts that did get through. It just won't be as accurate?
Thanks
would be grateful if you give a session on creating a lookup table in Qgis and CN curve.
Sir during conversion of clipped into RT, band 1 is not getting converted, why? Please explain or tell me how to deal with it
Hi, I was wondering if you would be able to make a similar but looking at mapping change over time?
I am currently working on my undergraduate dissertation looking at vegetation change in north east Iceland from 1970-2020 at 5 year intervals using Landsat data.
Any help would be greatly appreciated! Thanks in advance :)
Did you get the data?
If yes, then from where?
I am unable to get the option add band to band set, also in the SCP dock there is no option of class id. Any suggestions on how to work on that?
When I acess the landsat Natural Color Image, only RGB bands show up. Which particular image do I need to download to have the multiple bands like yours?
I have a Mac M1 and the SCP Plugin doesn't work on it. Is there any alternative way to do this? Or any way to make the plugin work?
thanks for your clear explanation
You are welcome!
Hello sir, thanks for your handy tutorial.
I have one problem, I hope you I explained all the things to make you understand.
My problem is:
I have classified NDBI into a Built-up area and non Built-up area. Over my study area there is a multiple municipality. So how can I change the raster value ie Built-up area raster value by population and each municipality has different population. Is there any way to solve this problem. One way is by clip the raster by features and reclassify. But I want whole study area.
At 9:36 you've checked "only green and blue bands option" but this option isn't showing in my interface. Only "add bands in a new bandset" option is available. What should I do?
Thanks for your presentation, it is much helpful.
No problem 👍
This is another GREAT tutorial! One question, when in training mode, can the layer be switched on/off with an orthophoto underneath that could be used to reference between forest and fields? Please continue making these videos - you are a great teacher! On another note, I am looking for ways to identify flash flood areas using QGIS and then using HEC-RAS to create predictions for various percent of risk. I'm comfortable with catchment delineation and Straher identification, but get lost in where to dig into the Hec-Ras transition. Suggestions?
1. Yes, that's totally doable
2. The entire process itself can be quite complex, but to squeeze out the gist of it;
You need to have a calibrated hydrological model to provide the catchment flow inputs to your HEC-RAS model. HEC-HMS is a suitable model to do this. Once you have a calibrated hydrological model, what your simulations can provide you are the design steamflows corresponding to different return periods. Once you have this, you can start building your HEC RAS model. Ideally, you should calibrate your river model using some observed flow or water level data, and for an accurate representation of the river, you may also use river cross sections obtained through a proper river survey. Once this step is done, you can provide the design flow inputs and simulate the flood scenarios for different return periods. What you get in this manner as the flood depth is the Hazard. But since you are talking about risk, risk is generally termed as the product of hazard and vulnerability. You already have the hazard maps, now you need to find a way to create the vulnerability maps. I think you can do a bit of research on how to do this. Once you have the hazard and the vulnerability maps, you can use GIS tools to derive the risk maps based on that. To top it off, you may classify your map into categories like Very high risk, high risk, medium and low risk, base on your interpretation of the values.
which band should I use for Minerals
Hi Bro, I applied the same processes, but the stream was not blue and the vegetation was not orange, why did it not?
How does it work for Landsat 5 for instance that band 6 is the thermal band? I should not add it to the lot of bands that will be analyzed, is that correct? what will change in the process, can you say?
This was an excellent tutorial! Thank you!
You are welcome :)
Hi, I have a file with temperatures and coordinates from weather stations at 10 minutes interval time over the next 4 hours, the temperature in centigrade. I need to make a layer from every time interval from set weather stations. If I want to show in every layer the temperature using areas with a different color inside the map for every weather station to identify color with its temperature. Then to filter by layer and also select one or more combinations to get a map to analyze change temperature for 2 or 3 hours. The raster interpolation is it necessary in this case?
Any advice is appreciated. Thanks in advance for your help!
when i am adding the mtl file after uploading clipped file folder, only one band is visible in my table and not all the bands. how to correct it?
This method can be used also for landsat 7 image classification? or is there some changes?
Dada, the training inputs I am taking are not doing more than two shows
Thanks! I had a query. What is the difference, if any, between SCP and SAGA plugins? both of which have classification plugin
Can you tell the steps of study land use and land cover?
The tutorial is great! But I get huge values for my reflectance layers and I can't find the problem. Any idea?
I have a doubt
The bands are not in order. Even if I rearrange them in the layers tab in the plugin they remain the same. What should be done?
Thanks for the video. I'm following along and tried to clip the Landsat images to a shapefile of a watershed that I already had created. This resulted in QGIS hanging up and not responding, so had to force quit. I'm not sure if this is a glitch with QGIS (the latest version seems to have a few bugs) or perhaps this task is too resource-intensive. If you have any suggestions, I'd appreciate them. Thanks
Thank you very much for this very rich video. Please, could you produce another wich shows how to cut the part of NDVI for exemple according to the limits of the zone of study.
Really helpful tutorial, thank you!
You are welcome
Which plugin we should use for raster unique classification of this image?
Very fantastic and interesting job. Can you make another videos on how to improve the classification and the validation?
You are amazing. Thank you very much. I was needing an introduction to Satellite Imaging, and this is fantastic !
Do you know where is the standard place to start with in depth theory ? Any Book, open resource, paid, website ?
Should I start going to NASA ? I would like to get really good in producing/processing satellite imaginery on a regular basis, for my future projects, and it would help !
This is very useful. I am a complete novice in this area, please could you explain to me how to acquire the data over an entire country. The USGS website limits the images to very small areas or am I doing it wrongly?
Excellent class
Thanks alot very helpful video. Please tell one thing ,my area of interest covering under 5 images of Landsat8 so do i need to first merge same number band of different area or it can be done directly in SCP plugin.
Great job... Keep on doing 👍
can you please tell how we can compare two maps (current species distribution vs future specices distribution map) to shows change in habitat suitability?
Thank you so much !
No worries!
When I try to save training sample (ROI which I create for a class), it gives error. It proceeds up 73% and then produce error showing MTL file is not valid layer and cannot read. Any help will be highly appreciated
AT 5:35 when we need to select area on the map the red highlight box does not appear for me does anyone know how to resolve?
Hello sir, how can I do classification on human settlement like buildings or other installation. Also man made installation on the sea.
reason of not using band 8 til band 11? SCP do not process band 10,11?
Very good tutorial
Glad you liked it
great one.thanx
Nice one. Thanks so much
Glad you enjoyed it
Sir my virtual band set are also not getting created like you please guide
I tried preprocessing on landsat 7 data but it showed an error after clicking run which says unable to load rater. What to do in such case?
in case i want to make the same map for 2010 which landsat should i use ?
when I set the RGB to 4-3-2 or any combination the virtual band set appears black
Hmm that's pretty strange
I have installed the semi-automatic classification plugin on QGIS 3.20.0(Odense) and also downloaded Landsat 8 images and wanted to test one of the semi-automatic classification procedures. However, I failed to create a training input file (*.scp) getting the following information on my QGIS main window:
Information [4]: Select a raster; raster is not loaded. Please help to solve this problem.
SAME problem...need help too :(
Image conversion process failure.. Also landsat tab missing. Please help.
please also explain what different colour means in different band combinations?
My bands are not corresponding after I run the RT, my bands, then start from 2 to 7
Thanks for this video. Please tell how to find SCN- CN using QGIS.
I request you to please make video to generate CN no using QGIS
Nice sir..👍& thank you for this tutorial 🙏
getting error while clipping multiple raster as cannot convert float infinity to integer
How can I deal with multiple imageries? as I have big area of interest combining 6 Landsat imageries.
Could you please make a video on post classification accuracy improvements
Thankyou for the video. It's helpful
You are welcome
Thank you very much 💖
You are welcome :)
Excelente...tutorial👏👏
Good job, thank you! Tell us how to check the resulting classification and remove single pixels.
My preprocessing don't have landsat sentinel options