Mapping Mangrove extent with Sentinel-2 : segmentation classification in SAGA GIS 4+

[@HydrographicSurveyor]

😃👏👏👏👍

[@lovensiaalbasit1520]

Thank you for the excellent tutorial. I wonder, why do you prefer the RGB band combination instead of false-color composite for Mangrove (4811)? Does it make any difference if I use the latter band combination? Thanks in advance.

[@trowertower]

No it shouldn't make a big difference. Try and see.

[@milanalfonso4814]

sorry to be offtopic but does anybody know a trick to log back into an Instagram account? I was stupid forgot my account password. I love any assistance you can offer me!

[@bobbyroman6785]

@Milan Alfonso Instablaster :)

[@milanalfonso4814]

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[@milanalfonso4814]

@Bobby Roman It worked and I actually got access to my account again. I'm so happy! Thanks so much, you saved my account :D

[@criscayetano69]

Can I do accuracy test for this mapping? If yes may i know how? please Thank you

[@smarajitnaskar9495]

how do you know what part is mangrove and what part is other types of vegetation?

[@flaviatamarindo1274]

Hello, do you think it is possible to work with LANDSAT 7 or 8 instead of SENTINEL-2?

[@trowertower]

Yes totally possible. Try it.

[@flaviatamarindo1274]

it worked but did not turn out well when i did the segmentation, probably the color was not very clear. but thanks for the tutorial! do you know other methods to map mangrove area?

[@trowertower]

I suggest playing with the bands you use for segmentation and some of the segmentation settings

[@aachannel3949]

hello sir. have you experienced do a processing for mangrove dealienation using ecognition software?

[@trowertower]

No I prefer SAGA

[@ricardofelipelo]

Hey I'd like to do a before-after mangrove area comparison, do you know where I could find the files for before and files for after?

[@trowertower]

Have a look here: sagatutorials.wordpress.com/accessing-satellite-imagery/

[@ricardofelipelo]

Thank you!

[@cikponti4879]

Hi. how do you download satellite data? it seems like i don't have the button to download the image

[@cikponti4879]

I mean there's no link for download button for sentinel-2

[@trowertower]

Hi - yes you can no longer download S2 data from Remote pixel. I recommend using sentinel hub EO to access the data. sentinel-hub.com/explore/eobrowser

[@cikponti4879]

@@trowertower thank you for the respond. Yeah I already did manage to download the satellite data. I have a further question, how did you manage to trace mangrove on the satellite image map when you were selecting segments?

[@trowertower]

@@cikponti4879 What state (time point) in the video are your referring to?

[@cikponti4879]

@@trowertower 4:15

[@husnanhabib1777]

min, untuk memunculkan "Merge Selection" gimana ? terima kasih sebelumnya

[@trowertower]

Make sure you have the polygon data you want to merge selected in the data tab and then right-click on the poygon data in the map window. The 'merge selection. should appear in the drop down menu.

[@rizalfadlanabida9447]

tutorial secara tertulisnya di web apa gan?? Videonya mantab

[@trowertower]

sagatutorials.wordpress.com/mapping-mangrove-extent-with-sentinel-2/