NDSI Calculation or extract Glaciers and snow area form Landsat images

hello dear friends welcome to another GIS and the most things in YouTube channel video today we will discuss about in DSi conclusion it means normalized difference is no index conclusion and also we can say extract glacier in arcmap or determining the glacier EDI in our mark this tutorial will cover from laughs in this eye and also map algebra before starting that toriel don't forget to Like share and subscribe your channel now come to an R in this image as you see it is a normalized difference is no index as you know for determining there's no index or any index we need satellite image satellite image I covered the some earlier by the wavelength and also for combine if you combine green and short wavelength infrared you will M you will achieve that is no index in here we have a girl as you see in the formula it is a kind of some formula for normalized difference there's no index if you combine green - short wavelength infrared divided to green pasture weapon infrared you will achieve the is no index goes off in green it's no in green have a more reflection high reflection but more absorption in short wavelet infrared this is the reason of why we use green - shortwave flame or divide - green + a shortwave band infinite this is the reason cause of green in s no index has a more reflection and also shortwave plane has a absorption in its no index these are the reason ok now come to arcmap environment now we add data in here we need mom bond in Landsat 8 we have a bond to a boundary cut off we have an RGB red green blue this one is a blue this one of the green add this one's and also one six one six one seven or one six is a short wavelength in fret 1 and 1 7 is short wavelength infrared tube in here we use 1 6 these are two ones if you combine this to this last image or we can say to these balance we achieve the snow index how come to arc toolbox we have been a spatial analyst tools come to map algebra you can have a raster calculation and also as you see in the yeah follow my cursor in here you can see the value of the these images NT flat cause of use in here flat ok and here we have a condition things just click here before I just double-click on float because when we used cause of these order the flat numbers in here we know about this is about 6 you need formula we have band green - shortwave plate infra it means band 3 - ban sex but it will be different in any satellite they made one stream and you can see b3 b6 it will be more - friend but this is the formula is a constant as you see here green - short wavelength in fridge don't forget this one's come to here we have a flat double clicking here - ban sex after divided into double silicon flood boundary sorry it is a bone sex don't forget to double click on bond tree +16 yes in here we should determine the output by the name of in the is I normalize difference is no index just come talk that digit will be four in this area must be minus 1 up to 1 just close as you see here this in this side low value is minus 1 the high value is 1 ok now come to here double-click on India so come to the properties of this in this I Russell image we have a symbology we use classified just ok just years four kalsa fight in here we should use five plus we use classify and this is we can use manual that's the range minus 0 1 minus 0.1 up to minus 0.5 0 minus 0.16 0.45 Hey it means this raster image included or will be include from the low value should be minus 0.1 up to 1 how we know you can see if we zoom any place we have an here identify any pixel you can see the range here is the India side you know doesn't mind okay here the glacier part also you can see the 0.5 it will be not glacier may be wrong Mabel only thinks this is a minus 0 point it's the Indies I double click and this once again come to classified if I find class we'll be good it's okay in here we should use by the name of no data also note that this one should be rock this will be should be [Music] it's no or we can say just no yeah in here we can say it's no plus glass here and updo and this means from 0.45 up to 1 it should be glacier okay yes come to know in here Rose flat color and double click on here should be no color the rock type should be this one's the snow part and glacier part should be this one and the glacier porch would be this one and this was yeah you can use use hell effect that should be change for God walking and also just apply okay now you can see go back you just zoom in here you can see this part of the glaciers and she this portal should be rock maybe it's amazing but you can for if you adjust the number you will never see this j-rok pointing here this one should be must from the debris sorry from the glacier but for it needs more trying to adjust the number more the class for adjusting the number if you use more class it will be more I just think that okay yeah no if we want to if you use more about it means 10 class divide that would be that should be it data should be changed by the name of which we should know data it's also know data may be wrong but yes V is no data just my aim my goal is to identify the is no English apart if you focus on another things in a vegetation rock don't forget to use no data for the - okay just we know that it's no index or the clash index about the number should be must be about above 0.2 0.1 okay you for - also we can say no data it's also no data in here we can say rock now come to here we can say pink like teens now you can say snow and here we should use glacier also glass here glacier okay and also we can change in here we can use double click no color double click for no color for no that also no color for rock should be this one this one should be for tennis now we can use this point just like sky this one's for snow we can use this one's from glacier we can use by stay by sleep you should depart use just apply okay now you can see it will be you can see good looking also you can mourn it existing but in here this is the way this is from the way you can see you can I just think the remember okay this is the end of this video for more video plays in that your comments and don't forget to Like share and subscribe the channel for supporting that the team and also for supporting the YouTube cleaner bye bye

Channel: GRScience

Views: 1,834

Rating: 5 out of 5

Keywords: Arc gis, GIS, remote sensing, how to calculate NDSI, how to calculate glaciers, how to calculate snow, how to identify glaciers in arcmap, how to extract glaciers and snow in arcmap, Glaciers, snow, how to classify glacier in arcgis, how to classify snow in arcmap, landsat images

Id: tRBdEp5EJSM

Length: 11min 22sec (682 seconds)

Published: Sun Apr 19 2020