DEM Generation using Sentinel-1 images in SNAP

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Күн бұрын

A Digital Elevation Model, also known as a DEM, is a type of raster layer. They are raster grids of the Earth’s surface referenced to the vertical datum-the surface of zero elevation to which heights are referred to by scientists, insurers, and geodesists. DEMs are critical in areas such as infrastructural management, hydrology and flow-direction studies, and land-use planning. DEM can be generated with different methods or can be downloaded from related websites. one of the suitable ways to generate DEM is satellite images, in this video we've used Sentinel images, which are appropriate for this purpose, to generate DEM. All of the processes have been performed in SNAP software because of its performance in processing sentinel images. in this video, you learn how to generate the DEM from A to Z using sentinel images. if you have any questions, you can leave us a comment.
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Copernicus website to download images:
✅ scihub.copernicus.eu/dhus/#/home
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The website to download the SNAP:
✅ step.esa.int/main/download/sna...
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The website to find and download SAR, InSAR, and other data
✅search.asf.alaska.edu/
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Subscribe to our channel and Like the video:
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Share the video with others:
✅ • DEM Generation using S...
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Timeline:
00:00 - Introduction
00:28 - Download the perfect Sentinel-1 image to generate a DEM
02:27 - Choose the appropriate Sentinel-1 image on the Alaska site
07:46 - Download and install Snap software plugins
09:55 - Install SNAPHu Unwrapping in SNAP
11:50 - DEM Generation in SNAP
11:56 - S-1 TOPS Split
13:41 - Apply Orbit File
14:31 - Co-registration - S-1 Back Geocoding
15:31 - S-1 Enhanced Spectral Diversity
16:13 - Interferogram Formation
17:35 - S-1 TOPS Deburst
18:35 - Interferometric - Goldstein Phase Filtering
20:00 - Snaphu Unwrapping
25:22 - Interferometric - Phase to Elevation DEM Generation
28:40 - Geometric - Terrain Correction - Range Doppler Terrain Correction
30:04 - How to export KMZ format from DEM
31:06 - DEM illustration in Google Earth
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DEM Generation using Sentinel-1 images in SNAP
#DEM #DEM_Generation #SNAP #DEM_Generation_using_Sentinel_1_images_in_SNAP #DEM_Generation_using_Sentinel_1 #DEM_Generation_in_SNAP #SNAP #Sentinel #Sentinel_1 #Sentinel_1_images #sar #remote_sensing #GIS #RADAR #microwave #microwave_remote_sensing #active_remote_sensing #sar_analysis #sentinel_1 #copernicus #gis_tutorial #gis_and_remote_sensing #geospatial #esa_snap #snap_desktop #mapping #geographic_information_system #remote_sensing_tutorial #digital_image_analysis #data #synthetic_aperture_radar #esa_snap_tutorial #synthetic_aperture_radar_tutorial #snap_tutorial #sentinel_tutorial #sentinel_1_tutorial #tutorial #copernicus_hub
#DEM_illustration_in_Google_Earth #Export_KMZ_format_DEM #Geometric #Terrain_Correction #Range_Doppler_Terrain_Correction #Interferometric #eaxtract_dem #Snaphu_Unwrapping #Snaphu #TOPS_Deburst #Interferogram_Formation #Enhanced_Spectral_Diversity #Spectral_Diversity #Coregistration #Coregistration_sentinel #Coregistration_in_snap #Apply_Orbit_File #TOPS_Split #Install_SNAPHu_Unwrapping_in_SNAP #Install_SNAPHu #Install_SNAPHu_Unwrapping #esa_snap_dem_extraction #digital_elevation_model #dem #dsm #dtm #extract_dem #creating_dem #creating_dem_with_sentinel_1 #creating_dem_with_sentinel
#creating_dem_in_snap #SNAP #Dem_extract #DEM_Extraction #DEM_Extraction_using_SNAP #DEM_Extraction_using_Sentinel_1 #DEM_Extraction_using_sar_image RS & GIS #RSandGIS

Пікірлер: 131

@rsgis6997 2 жыл бұрын

An Absolute Beginner's Guide to SNAP (Thorough Tutorial) - SeNtinel Application Platform kzfaq.info/get/bejne/f9ehe5eGqryrnY0.html

@IAKhan-km4ph 2 жыл бұрын

very nice. I learn a lot with this.

@rsgis6997 2 жыл бұрын

Glad it was helpful!

@shahinjafari7870 2 жыл бұрын

Thanks for this tutorial

@rsgis6997 2 жыл бұрын

You're welcome 😊

@bestiranianmusicschannel2542 2 жыл бұрын

Thank you for this tutorial

@rsgis6997 2 жыл бұрын

You're welcome 😊

@aliismail4226 11 ай бұрын

Good afternoon, How can I use the elevation information points(gcps) instead of using the srtm1sec model to create a DEM from the sentinel1 data

@ProfMWS Жыл бұрын

How to put geographic lat/lon projection elevation dem at snap? There's a gap at 30:06 . just figure out, do not change WSG 84 (keep it default) and allgo the rest is exactly how it should be. Thank you for the video.

@lifehacker4331 2 жыл бұрын

very very good

@rsgis6997 2 жыл бұрын

Many many thanks

@mucahitdal8707 2 жыл бұрын

Hi there Thanks for the video Why do we choose the basic criteria in the negative (-) direction? Also why do we choose the closest vertical criteria? Why is there no vertical criterion in the minus (-) direction in a sentinel image dated Oct 04, 2014? Thank you for your time ...

@rsgis6997 2 жыл бұрын

Hi, The baseline of two images of an area needs to be above 150 to generate a DEM from sentinel 1 images. it should not be less than 150 so we've used a number greater than 150. Also, in terms of the images period, it is important that the periods of two images with 150 baselines must be less than 6 months. So we can't use images that have a baseline greater than 150 and greater than 6 month time period. So in addition to the baseline above 150, the time periods of our images should be less than 6 months.

@weiliu9142 Ай бұрын

Hi there, thanks for the video, it is indeed a good method for areas without dem data. After I studied and followed the steps, and read the comments, I have already know this method is not applicable for urban and vegetation areas, this is a pity. My goal was to generate the latest and accurate-to-a-certain-extent (within 30) dem for my AOI, since you know, most of the publicly-available dem data were from like 10 years ago. Apparently this method is not going to help me with my goal, but I do have a few questions: 1. what is the actual resolution of such a generated dem and how can you check this? With the pixel size? 2. how do you cover your AOI during the spit and burst step? In the video you can see that the burst grids only cover part of the red square, right? 3. I generated a dem by following the video and exported the tiff files, but when I compare it with the srtm dem, there is a very big difference on the band values, espeecially the band values, the generated dem has values on band 1, 2 and even 3 and 4, but the srtm only has band 1, how so? 4. Do you happen to know any other way to help with my goal? I could really use some of your professional experiences on this 🤣🤣 Looking forward to your replies and thanks in advance 🙏.

@harshupadhyay3207 2 жыл бұрын

Is this a resampled dem resolution or actual?

@thirumuruganperumal5260 Жыл бұрын

Very nice and informative. can you share the spatial resolution of the DEM?

@rsgis6997 Жыл бұрын

Yes, sure

@Mohamedabdo-ib3ki 2 жыл бұрын

thank you so much for this awsome tutorial, and, is there a way to deal with the big size of the sentinel file, about 7 GB, i don't know if clipping to reduce the area of study affect the quality of the image .

@rsgis6997 2 жыл бұрын

Hi Thank you No, cropping the image does not affect the quality, and you can crop the image you want due to the large size of the images and the heavy processing, and perform the processing on your own area.

@bestiranianmusicschannel2542 2 жыл бұрын

very good

@rsgis6997 2 жыл бұрын

Thanks

@mohammadqasim3371 2 жыл бұрын

hello, can we have the dem in 10 m resolution/or say 30 m resolution? would that be correct accuracy-wise?

@rsgis6997 2 жыл бұрын

Hi, in terms of accuracy, the best DEM is 12.5 meters.

@ammarizakaria6813 11 ай бұрын

Thank you for the tuto, My question is why you chose bursts 1-2 in the 1st image then you chose bursts 2-3 for the second one?

@rsgis6997 10 ай бұрын

Hello, have a good time Because our study area was in bursts 2 and 3 Because the images are not shared in the same scene and the goal was to extract the desired range

@ammarizakaria6813 10 ай бұрын

Hellow, Thank you so much for your reply. well-done

@rsgis6997 10 ай бұрын

you're welcome Good luck If you have any questions regarding channel videos, thank you for asking @@ammarizakaria6813

@anitasblano4868 Жыл бұрын

thank you for the video, but I have a problem whit the S-1 TOPS Split, because when I run the analysis appears this error:" SOURCE PRODUCT SHOULD BE MULTI SUB SWATH SLC BURST PRODUCT". What I do to solve this problem? thanks a lot

@rsgis6997 Жыл бұрын

you're welcome What image format did you download Sentinel-1? SLC or GRD?

@mucahitdal8707 2 жыл бұрын

How did you determine the 152 vertical criteria in the video? Do you have any suggestions for vertical criteria in studies?

@rsgis6997 2 жыл бұрын

@mucahitdal8707 2 жыл бұрын

@@rsgis6997 For example, from the two-week image found in August for glacier studies; Can we produce digital elevation models between August 18, 2015 and August 30, 2015? There is no data that meets 150 criteria as you did in the video.

@rsgis6997 2 жыл бұрын

@@mucahitdal8707 Yes, you can in terms of time, but these two images must be higher than 150

@mucahitdal8707 2 жыл бұрын

@@rsgis6997 Thank you

@rsgis6997 2 жыл бұрын

@@mucahitdal8707 👍🌹

@yamilcornelio3269 2 жыл бұрын

disculpe , en el proceso de unwarpping , al direccionar el producto img, menciona que no se pudo leer :( , pero si lee el HDR

@rsgis6997 2 жыл бұрын

In this section (20:00 - Snaphu Unwrapping ) Do you have a problem? Did you do it exactly on the basis of tutorial?

@geosov2 Жыл бұрын

Thank you very much sir.. My question is can we do bathymetry mapping in the same way for inland lakes...or make depth mapping of lakes similar like dem..??

@rsgis6997 Жыл бұрын

Using the link sent, you can find the related training to work with the item you mentioned I haven't done anything for the lakes yet

@rsgis6997 Жыл бұрын

step.esa.int/main/doc/tutorials/

@zeeshanjadoon 7 ай бұрын

Export View as Google Earth KMZ; at this stage i get an error "Product must be in Geographic Lat/Lon projection". Am I missing anything?

@shahinjafari7870 2 жыл бұрын

👍🌹

@rsgis6997 2 жыл бұрын

🙏

@marioalegria1 Жыл бұрын

Hello, I hope you can help me, when I try to do the S-1 Enhanced Spectral Diversity step, an error in showed in the software processing: Generated network of images does not contain any pair. Max temporal baseline provided: 4. How can I move forward in the processing? Thank you very much!

@rsgis6997 Жыл бұрын

Hello To solve this problem, you can enter the link below And search the title of the problem to display solutions provided by friends If there is no solution, you can ask the problem in a question by sending a photo forum.step.esa.int/

@marcot4477 Жыл бұрын

Hello sir, in the vertical criteria, if I have a period of 12 days but in the two images I have a criteria of more than 160 but less than 180, is it valid to use these two images?... by the way, good tutorial

@rsgis6997 Жыл бұрын

Hello you're welcome Yes, you can use it It must be above 150

@maccabi081 Жыл бұрын

Hi, thank you for the video, it is really good. However, I can not install the SNAPU unwrapping, it dose not work, and I did everything like you said. What could be the problem?

@rsgis6997 Жыл бұрын

Have you placed the installation folders correctly? You can take a picture of the problem you have on the SNAP site and explain it so that it can be solved

@rsgis6997 Жыл бұрын

forum.step.esa.int/t/snaphu-unwrapping-plugin/13456

@scarletfalcones9032 Жыл бұрын

Hi, What should I do if when I was trying to do the step of Orbit File, a message apears "a problem occured during the target product initialisation"?

@rsgis6997 Жыл бұрын

forum.step.esa.int/t/a-problem-occured-during-the-target-product-initialisation/5064

@rsgis6997 Жыл бұрын

Go to the SNAP site and write down your error, solutions are suggested to fix the problem

@ritewereve6090 2 жыл бұрын

Thank you for the tutorial. Just wanna make sure at what resolution this DEM is Sir?

@rsgis6997 2 жыл бұрын

The accuracy is 13.9 meters at the best condition

@ritewereve6090 2 жыл бұрын

@@rsgis6997 thank you!

@ritewereve6090 2 жыл бұрын

Hello Sir, I tried the tutorial but I'm stuck at the unwrapping process. I got the output in .img format but it didn't show in the product explorer and when I tried to open it with SNAP It is unable to shows. Can you please enlighten me Sir?

@soknethlim3387 2 жыл бұрын

Excuses me again, may I know what the difference between elevation and elevation_VV is?

@rsgis6997 8 ай бұрын

Elevation is a ready-made model, but ElevationVV is a model that we extracted from Sentinel 1 images

@jndo12 11 ай бұрын

Hi! Thank you for this. I cant export to Google Earth bcs acording to the SNAP it muts be in "Geographic Lat/Lon" projection. Any solution?

@user-et2om3pt5u 10 ай бұрын

HELLO!I met The same question. How do you solve it?

@weiliu9142 Ай бұрын

@@user-et2om3pt5u roll back to the last step and choose wgs84 DD for projection.

@user-dx2yd3us7p Ай бұрын

I had a problem with the image registration Back-Geocoding step. Unable to generate the data and display: Java. Lang. NullpointerEXception. Can anyone help me to resolve this please?

@GeneWalterSchmidt 3 ай бұрын

not clear where/how the Orbit File was retrieved

@kat7310 2 жыл бұрын

Hi I’m running into a Java heap error in the back geocoding step. Pls help

@rsgis6997 2 жыл бұрын

Hi, it probably has something to do with your RAM. Java uses much of the RAM so it has to be upgraded to a higher one. if you can, increase the cache size of your RAM and try again.

@sumantrachatterjee7788 Ай бұрын

How would you export the digital elevation data?

@rakshyashrestha9372 10 ай бұрын

Hello Sir, what if the values of baseline are in negatives?

@rsgis6997 10 ай бұрын

Hello It is better to be exactly based on the video description to be more accurate

@2Idiots987 Жыл бұрын

Hi, When I get to the Snaphu-unwrapping stage I am unable to open the dialogue box. When I am at the step shown at 22:20 the Snaphu unwrapping tool does not open. Can anyone help me to resolve this please?

@rsgis6997 Жыл бұрын

Hello Are you getting an error? What exactly is your problem? Did you proceed according to the instructions?

@danicavanschalkwyk5208 10 ай бұрын

Hi, what is the difference between downloading it directly from the baseline tool vs copernicus?

@rsgis6997 10 ай бұрын

Hello So that we can get the right images in terms of a series of features that have a direct impact on the output of our processing We select the appropriate images with the help of the baseline tool Then in Copernicus you download the specified images

@danicavanschalkwyk5208 10 ай бұрын

@@rsgis6997 ahhh okay! Thanks so much for the quick reply 🙏

@rsgis6997 10 ай бұрын

you're welcome Good luck If you have any questions regarding channel videos, thank you for asking@@danicavanschalkwyk5208

@user-et2om3pt5u 10 ай бұрын

HI! What is the difference between elevation and elevation_VV?And i found that my elevation and elevation_VV vary greatly .Is this a reasonable phenomenon？thank you verymuck！

@rsgis6997 10 ай бұрын

Hello Yes, there is a difference Elevation is a different digital model But vv is a model extracted from Sentinel 1 image

@weiliu9142 Ай бұрын

@@rsgis6997 what do you mean elevation is a different digital model and ele_vv is from sentine_1, aren't they all generated from the two sentine_1 images downloaded from copernicus?

@arianniehoylar3491 6 ай бұрын

good afternoon, do you provide any tutorial for converting 30m resolution DEM into a high resolution DEM of atleast 10m resolution?

@rsgis6997 6 ай бұрын

Hello We do not have training to convert the accuracy from 30 meters to 10 meters But by using some sources you can download with 12.5 meters accuracy

@abubakarjibrilbabayo5279 Жыл бұрын

Well done Sir, please what is the difference between elevation and elevation_VV?

@rsgis6997 Жыл бұрын

VV elevation is the image output, but the elevation is downloaded from the site

@weiliu9142 Ай бұрын

@@rsgis6997 do you mean the elevation data was already in the sentinel-1 images? Everything we did in SNAP were just extracting and visualizing it?

@digantakumar1 Жыл бұрын

The apply orbit process shows an error as no valid orbit file was found for 20 Sep 2022, please suggest me a solution

@rsgis6997 Жыл бұрын

Do you tick the command?

@soknethlim3387 2 жыл бұрын

Excuse me, when I clicked download button, another screen appeared and reported that "Product unavailable. The retrieval of offline data is temporary unavailable, please try again later". What should I do then?

@soknethlim3387 2 жыл бұрын

The products became available now but the file is too large, more than 4 GB. May I ask whether it is possible to get only area of our interest?

@rsgis6997 2 жыл бұрын

Hello If you can, place an order request so that the offline image will be online for you as soon as possible so that you can download it What date is the picture you want for?

@rsgis6997 2 жыл бұрын

You can download images in GRDH format that have a size of 1 GB

@soknethlim3387 2 жыл бұрын

@@rsgis6997 thank you so much for your answer. I want pictures for date 20 and 26 Feb 2021. I don't know how to get that GRDF format. When I click download bottom, it is automatically downloaded in Zip format.

@rsgis6997 8 ай бұрын

@@soknethlim3387 Its right The same ZIP format is the image that you need to download There are images inside this zip file and you can use them

@mitkotecha4061 2 жыл бұрын

Can you upload video tutorial for mosaic sentinel 1 images?

@rsgis6997 2 жыл бұрын

Hi, surely we will, it will be created & Uploaded in no time

@rsgis6997 2 жыл бұрын

Mosaic Sentinel 1 images in the SNAP kzfaq.info/get/bejne/gryiqcudteDKqqc.html

@shahinjafari7870 2 жыл бұрын

@rsgis6997 2 жыл бұрын

🙏🙏

@goldenlamp99 Жыл бұрын

Hello. I am trying to unwrap the phase in SNAP and it is getting unwrapped but later SNAP import is not working. Even after the execution of Snap unwrapping, the output folder is not getting formed , I don't know why. Can you help me with this please ?

@rsgis6997 Жыл бұрын

forum.step.esa.int/

@rsgis6997 Жыл бұрын

Search the problems you have in the following site to see the solutions provided

@goldenlamp99 Жыл бұрын

Thanks for Replying. I did every possible thing mentioned in that site earlier but nothing worked.

@ulfahdurrotulhikmah2966 Жыл бұрын

sir, i got stucked at the Co-registration S-1 Back Geocoding, idk whats wrong and how to solve it

@rsgis6997 Жыл бұрын

forum.step.esa.int/

@rsgis6997 Жыл бұрын

Search the problem on the following site to find the solution

@franciscomiranda3239 2 ай бұрын

What about multilooking???

@rsgis6997 2 ай бұрын

Multilooking reduces speckle and decreases the spatial resolution.

@FathoniUsman 2 жыл бұрын

You did it on bare land with less vegetation. how about on densely vegetated land?

@rsgis6997 2 жыл бұрын

No, it is not done on land with dense vegetation

@soknethlim3387 2 жыл бұрын

@@rsgis6997 Did you mean we cannot use sentinel 1 for generating DSM for Urban area or forest area? If so, could you please let me know the reason? Many thanks in advance.

@rsgis6997 2 жыл бұрын

@@soknethlim3387 Yes, that's correct You can use it but it will be less accurate We explained the reason in full in the first video Watch the first part of the video

@soknethlim3387 2 жыл бұрын

@@rsgis6997 thank you so much for your response 😍

@weiliu9142 Ай бұрын

@@rsgis6997 OMG, then this application is really limited 😂😂

@mindibandi487 Жыл бұрын

hello, for sri lanka maximum is 100. how to find greater than 150 image. please tell me

@rsgis6997 Жыл бұрын

It depends on your region Some areas are more and some are less Dry areas are mostly higher Is Sri Lanka a dry region?

@mindibandi487 Жыл бұрын

@@rsgis6997 is it ok to proceed with less than 100m ?. im going to process the data somewhat dry area. ( dem for nearly 400sqkm). And how is the accuracy of this dem compared to SRTM 30m dem.

@rsgis6997 8 ай бұрын

@@mindibandi487 It is better than the tail of 30 meters you can work

@yamilcornelio3269 2 жыл бұрын

asi que use el Hdr min 22:38

@rsgis6997 2 жыл бұрын

You need to create a new folder based on the video and adjust the parameters Is Snaphu Export done for you?

@yamilcornelio3269 2 жыл бұрын

@@rsgis6997 gracias , realice todos los pasos y si me salio, pero por favor como convierto ese archivo a formato tiff y luego a curvas de nivel

@rsgis6997 8 ай бұрын

@@yamilcornelio3269 El archivo de salida es Tif. Para generar líneas de contorno Debes hacer esto en otro software como ArcGIS o QGIS.

@yamilcornelio3269 2 жыл бұрын

cual es la resolución del DEM generado?

@rsgis6997 2 жыл бұрын

The accuracy is 13.9 meters at the best condition

@yamilcornelio3269 2 жыл бұрын

@@rsgis6997 muchas gracias .... seguiré todos los pasos... quiero monitorear los cambios que ocurrieron en una zona aquí en Perú... y 13.9 metros es para mi excelente

@rsgis6997 2 жыл бұрын

@@yamilcornelio3269 Buena suerte

@sushantanepal Жыл бұрын

can we get the output file as tiff file?

@rsgis6997 Жыл бұрын

yes

@sushantanepal Жыл бұрын

After Back geocoding and while carrying out enhanced spectral diversity, an error occurs as: A problem occured during the target product processing. Type: OperatorException Message: Generated network of images does not contain any pair. Max temporal baseline provided: 4 Can you please help me on that?

@rsgis6997 8 ай бұрын

@@sushantanepal Do you choose the Digital Elevation Model correctly? And did you do the previous steps exactly like the video?

@mohama7551 Жыл бұрын

Convert Sentinel 1 radar image from grd to gpr format

@rsgis6997 Жыл бұрын

Hi sir, unfortunately we haven't processed or worked with the GPR format, sorry about that. Hope you can find helpful information from this GitHub Link: github.com/emanuelhuber/RGPR

@yamilcornelio3269 2 жыл бұрын

Habrá alguna manera de contactarme con uds , numero de celular correo?

@rsgis6997 2 жыл бұрын

Hello, yes, there is an email address remotesensingandgis2022m@gmail.com