Hello, the research link you provided based on AHP, Table 5 there had values like 0.156, 0.118, 0.178 and so on form DEM, Slope, and Rainfall and so on. But here in your slide, its tiny bit different, is it because assumed just these 5 values and and found average yourself, or did you referred other books or papers?
Hi! Thanks for the explanation, it was very clear so I could apply it to my own work. I wanted to point out something though, when you reclassify the DEM from 2 - 10, you are assigning the value 10 to "flat areas", but isn't the DEM about topographic altitudes? Shouldn't you consider lower numbers as lower altitudes, and not as flat areas (isn't that why you have the slope there)? I say this because in my area, for example, I have the flat areas in higher altitudes (plains) and they can't get flooded even if they are flat, so I had to modify things a bit to get a more accurate end result (according to my area, of course). Anyways, thank you so much for explaining your process in such a detail way, it was really helpful!
Thanks for the great tutorials. Can you please share any reference that supports the factors used to create the map just in case it needs to be used for research purpose? Thank you.
This article might be helpful: Parsian, S., Amani, M., Moghimi, A., Ghorbanian, A., & Mahdavi, S. (2021). Flood hazard mapping using fuzzy logic, analytical hierarchy process, and multi-source geospatial datasets. Remote Sensing, 13(23), 4761.
When I used the eucledian tool, I did not get the same esult and the output was not in different classifications but instead in a colo scheme from lo wto high. Why?
How can we calculate the flood water depth Is it possible to do it in ArcGIS or do we need HecRas or any other tools ? Is it possible with the open-source data
Excellent tutorial. Do you have a reference I can cite for the weights chosen? Or can you recommend peer reviewed papers that offer some guidance for weighting? I would like to cite in a report. Thanks.
Hello, please can i use euclidean distance to locate states in my country that are susceptible to flooding when a particular dam in a neighbouring country is opened?
Hi there, This work is just excellent and was working out for me. Until I started using the euclidian analyst tool. It is showing an error while saving the output file. Can you please help me out with that? Thanks.
The weights depend on the expert's opinion (e.g. using AHP technique). You can extract some of these data using supervised classification of satellite images
@@HealthGIS Reclassify [000000_12301899] Is resolution the issue? Because other maps have a 30 m resolution but the precipitation layer has ~1km resolution!
It has nothing to do with other layers. Make sure in the path (including output name) that you store your output raster layer, there is no space or special characters.
@@HealthGIS Yes there are no spaces or special characters involved neither in the path nor in the name. I've checked it. Also the reclassification issue is only with the precipitation layer while the other layers reclassified fine.
If you could consider sharing only the reclassified precipitation map and the weighted flood hazard map (not reclassified), it would be very helpful to cross verify me results.
bro you made others seems like amateurs ..excellent work!
I really like how clear the explanation is in this video, finally i get it after multiple tries. Thanks fam !
Glad it helped!
@@HealthGIS
Can you share the source of Journal
This helped me fix an issue I had. Thank you! I know I was doing something wrong stepwise
Glad it helped!
Sir, can you give us some advice, where'd you get that floodrisk criterias & percentage of their influental factors as mentioned 10:49 ?
very clear! great job, thanks
Wonderful presentation. Very useful and detailed. Kudos
Hello,
the research link you provided based on AHP,
Table 5 there had values like 0.156, 0.118, 0.178 and so on form DEM, Slope, and Rainfall and so on.
But here in your slide, its tiny bit different, is it because assumed just these 5 values and and found average yourself, or did you referred other books or papers?
Amazing! Very clear and workable, Thank you ❤
Hi! Thanks for the explanation, it was very clear so I could apply it to my own work.
I wanted to point out something though, when you reclassify the DEM from 2 - 10, you are assigning the value 10 to "flat areas", but isn't the DEM about topographic altitudes? Shouldn't you consider lower numbers as lower altitudes, and not as flat areas (isn't that why you have the slope there)? I say this because in my area, for example, I have the flat areas in higher altitudes (plains) and they can't get flooded even if they are flat, so I had to modify things a bit to get a more accurate end result (according to my area, of course).
Anyways, thank you so much for explaining your process in such a detail way, it was really helpful!
Thank you so much for this great tutorial!
You are so welcome!
How did your pre layer go from stretch symbology to unique values after you clipped it?
Thanks for this awesome video!
Are there any sources that confirms the use of the specific percentages for the influential factors?
Thanks for the great tutorials. Can you please share any reference that supports the factors used to create the map just in case it needs to be used for research purpose? Thank you.
This article might be helpful:
Parsian, S., Amani, M., Moghimi, A., Ghorbanian, A., & Mahdavi, S. (2021). Flood hazard mapping using fuzzy logic, analytical hierarchy process, and multi-source geospatial datasets. Remote Sensing, 13(23), 4761.
Look at ñ0l
@@ishtiaquehussain56 ?
@@HealthGIS I was looking for this! Thanks a lot.
@@HealthGIS Thank you!
where can i see the tutorial on getting the DEM/Slope data?
When I used the eucledian tool, I did not get the same esult and the output was not in different classifications but instead in a colo scheme from lo wto high. Why?
"This is what I like to see."
Thank you so much, is your PowerPoint presentation downloadable? 😅
hello, can you tell me if you Know the application of ESTIMATION OF INSTANT HYDROGRAPH UNIT WITH CLARK TECHNIQUE IN GIS;
How can we calculate the flood water depth
Is it possible to do it in ArcGIS or do we need HecRas or any other tools ?
Is it possible with the open-source data
My area is small so precipitation on that area have two pixel value only which I can't weightend sum. Pls help me with this
Please my prox to steam output is on 0.1
It analysed the whole boundary instead of the stream network
What I'm I not doing right
Excellent tutorial. Do you have a reference I can cite for the weights chosen? Or can you recommend peer reviewed papers that offer some guidance for weighting? I would like to cite in a report. Thanks.
I have the same question. Did you find any reference for the weighs chosen?
Nice work mate. 👍
That was fun, thank you!
Hello, please can i use euclidean distance to locate states in my country that are susceptible to flooding when a particular dam in a neighbouring country is opened?
I was working on GeoHECRAS and this helped a lot. Special thanks for sharing the timestamps; they helped me get to the part that directly.
I'm glad it was helpful for you.
How did you get the land cover and slope data?
what are the value units for the precipitation data? Millimeters?
Is there a link for your slope making in arcgis?
Hi there, This work is just excellent and was working out for me.
Until I started using the euclidian analyst tool. It is showing an error while saving the output file. Can you please help me out with that?
Thanks.
The common mistake that leads to error in the Euclidean Distance function is having space for the output path or file name. Please double check..
Very nice information
Thanks!
excellent thank you very much.
Why are you reclassifying the generated layers?
?
also could you elaborate hw to get soul maps and it's classification
thank u so much. like this video, i am doing same process but while fill up hill shade, error has been shown. can u give me a idea
amazing !
Hi, what would be the classification for water, trees, flooded vegetation, crops, built are, bare gound and rangeland? Thank you in advance!
The weights depend on the expert's opinion (e.g. using AHP technique). You can extract some of these data using supervised classification of satellite images
The fill tool keeps returning error
thank u so much
please where can I download required Data for this analysis
That is just amazing work! if you allow me, from where you got the Landcover layer?
Thanks, its from USGS NLCD, I have explained where you can get that in the previous video:
th-cam.com/video/rs4GX-XIc7A/w-d-xo.html
@@HealthGIS Thanks for the swift response
@@HealthGIS Thanks for this, could you please guide me from where i can download landcover and land use for Iraq ?
Please my map shows in small visible pixels how do I rectify it
Please provide a link to obtain the world rainfall data
How I can convert HGBDR format to Tif in arc gis
The precipitation raster layer is not reclassifying while other layers reclassified smoothly. What could be the possible reason?
What's the error message?
@@HealthGIS Reclassify [000000_12301899]
Is resolution the issue? Because other maps have a 30 m resolution but the precipitation layer has ~1km resolution!
It has nothing to do with other layers. Make sure in the path (including output name) that you store your output raster layer, there is no space or special characters.
@@HealthGIS Yes there are no spaces or special characters involved neither in the path nor in the name. I've checked it. Also the reclassification issue is only with the precipitation layer while the other layers reclassified fine.
If you could consider sharing only the reclassified precipitation map and the weighted flood hazard map (not reclassified), it would be very helpful to cross verify me results.
Thanks a lot
How to validate this final map result?
What do the 'value' and 'Count' in the attribute table of prc represents?
Value is probably precipitation in centimeters or inches, while Count is how many pixels share that same value
what is slope ? ,
I saw no one responded. It is based on elevation of contour line
👍🏾
very clear! great job, thanks