How to Fill and correct Hole or Gap in a DEM using ArcGIS

This tutorial is about how to fill holes and gaps in a DEM, either DSM or DTM using IDW interpolation. The difference of this way compared another conventional method is, this method actually utilize the raster functions, so the processing could be done on the fly and you can get the result as soon as possible. once you feel satisfied with the result, you can save it using export data procedures, so it can be stored as permanent raster dataset

[@GEO2004]

how to get a DTM from DSM : kzbin.info/www/bejne/m3Ovpqt3bc6YabM

[@guningogoi3733]

It is a fantastic Function, really useful! Many Thanks for upload.

[@MrsHarryPotterFan97]

Wow thank you so much! This is just what I needed!

[@GEO2004]

glad it was helpful

[@deepangshuchandra6123]

Thanks, very useful information

[@maroofshaikh7915]

Thank you so much for providing such an informative video.

[@monadm5697]

Amazing pal,,,,, really amazing ,,, Thanks

[@Gabriela-pi2uc]

Thank you so much !!!!

[@GEO2004]

You re welcome

[@liarak.6603]

Ajudou demais, estava tentando resolver isso há dias!! Muito obrigada de verdade!!

[@GEO2004]

feliz que poderia ajudar

[@chamberlinzameessone1153]

Thank you for sharing this video. Best regards.

[@israeldeoliveira4049]

It was really helpful. Thank you!

[@GEO2004]

Already welcome man

[@historygeek4978]

Thanks a lot! this saved my days

[@smeden91]

Thank you so much for this!!!

[@tayacristoparreiras1995]

Thanks! You've saved me :D

[@Champ-wm2sx]

Could you please instruct me how to perform these functions in ArcGIS Pro, the main steps ? Great Help!.

[@GEO2004]

I will make a video about it if I have time.

[@Champ-wm2sx]

@@GEO2004 Many thanks. I don't have access to ArcMap anymore.

[@riyabhattacharjee180]

Hi..In my Study area DEM (Cartosat) Maximum value is 233 and Minimum value is -213...How can I adjust these negative values to perform contour and relief map?

[@GEO2004]

Set 0 as minimum value

[@Champ-wm2sx]

Thank you so much! Have you discussed other methods ?

[@GEO2004]

Not yet at this moment, however, there are plenty of other methods

[@Champ-wm2sx]

@@GEO2004 Can I ask a question? In my DEM minimum value range is 158.145 and 513.635. So, what should i enter as the minimum value in Raster Function Properties (included ranges)? 158.145 or 0? I don't understand the theory behind this.

[@GEO2004]

In this case, 0 or 158.145 doesn't matter, you can read the spatial interpolation topic if you want to understand the principle behind this stuff.

[@Champ-wm2sx]

I did it, thanks once again. I then converted my 'Corrected DEM' to slope and hillshade. DEM looks fine, but when I derive the hillshade and slope layers, they clearly show the areas that have been filled (gap areas). How can I improve this, please?

[@GEO2004]

Maybe the gap is too large, so the algorithm is not effectively working, I guess you should look for a better quality DEM, fixing this will be very hard and time consuming.

[@Champ-wm2sx]

@@GEO2004 Many thanks. However, I will have to go with this file. What are the recommended methods for correcting large gaps, please?

[@GEO2004]

No idea, sorry, unless you will ignore the hillshade and slope problem,

[@memorie411]

how to do same thing for Land Surface Temperature,NDVI etc?

[@GEO2004]

You can try majority filter from spatial analyst tool for them, expect some data loss

[@IrshadAnsari-uf8nr]

After using fill tool in ArcGIS pro Im getting unusually high elevation what could be the reason

[@GEO2004]

without looking the data, I can't make sure

[@w1f2h3g4]

Thanks so much

[@Champ-wm2sx]

Hi In my DEM minimum value is -1000 and the maximum is 478.567. what should I enter into the minimum value in 'Raster Function Properties (included ranges)'? zero or -1000? Thanks a lot once again.

[@GEO2004]

Zero

[@Champ-wm2sx]

Thanks a lot! @@GEO2004

[@sunflowerbaby6926]

Hi, thank you for this video. I have a human footprint DEM that I downloaded and they have "no data" gaps as well. After creating the mask function, I can't seem to find the "elevation void fill" option. What do I do?

[@GEO2004]

I am sorry for the very late response, my channel messed up lately due to youtube changes, so I cant get any notification about incoming comments, As far I know, the elevation void fill function is not available on ArcGIS version prior to 10.3 so I suggest to update your ArcGIS to at least version 10.3, hope it will helps.

[@bondeandeebowl]

Great video - I just started using Pro. Is there a way to do this in Pro?

[@GEO2004]

Of course, you can use arcgis pro raster function that basically is same raster function with the arcgis desktop

[@Infographic_Edu]

Its really a nice video. Can you please also share gap fill in 4 band image or RGB image gap fill?

[@GEO2004]

you can refer to my videos about removing clouds from imagery, the method is similar.

[@Infographic_Edu]

@@GEO2004 Actually i have clipped some tiles with grid. the clipping grid boundary removes the pixel on the boundary line. so there is a gap between tiles. how to fill that gap? i dont have raw data.

[@GEO2004]

Your case is sure a different matter of gap filling. The tool I demonstrate in the video will not work on your case. Your case is little bit complex and needs some processing steps before you can get acceptable mosaic. Here are the steps: 1. Mosaic all the tiles 2. The output mosaic will have a lot of black gaps ( if the output is 8 bit) or transparent gaps (if the output is 32 bit). If its black, you are lucky because the elevation void fill functions will works for you. you still have to process it band by band though. If the gaps is transparent, you must re-export the mosaic to 8 bit image and make the gaps has black color (zero value), then you can apply the gap filling

[@Infographic_Edu]

@@GEO2004 Thank you so much. 😊😍

[@khuongtran9650]

Can we do batch processing because I have many images have same problem?

[@GEO2004]

I cant say does it is possible or not, because raster function in arcgis desktop look so "under the hood" One possibilities to do the process in batch is using arcgis pro, because the raster functions and modules can be accessed from python/anaconda, so we can write a loop of python scripts to do it.