Land surface temperature (LST) time series chart using Landsat imagery in #googleearthengine

hello hello yeah can you hear

me yes please sir yeah how are

you okay so now we discuss about topic

okay so uh where are you from okay I

think you already joined my program

yeah yes please I'm from Ghana okay okay

okay so now okay so basically uh uh who

joined my online training program for

one time they can get the free support

all time so that's why you can also get

the free teaching support in this time

okay so in this time you can simply talk

me about your uh problem what you

face okay okay yeah okay so the problem

I was facing was um after the um Lear Le

cover classification the land surface

temperature classification I wanted to

create can I share my screen yeah yeah

can share your screen then it's better

sure okay so yeah yeah so please after

the

um the land of temperature creation I've

created

everything following the tutorials you

give us so I was trying to generate the

L the time series chart of

the

okay okay okay okay so okay so in this

time uh for the time Ser chart okay can

you send me the code link with your uh

asset it also better okay so click on

the get link button get link button and

send me a link

yes copy and send me

that then I try to show you that how we

can easily create the time series chart

for

LST okay okay send me in the Google meet

chat box it's little better yeah send me

the Google meet chat

box oh okay okay sure and I can easily

access from my laptop and then open

it

okay second number t

so ch ch Bo okay so you can get the in

the right

corner okay

so c phone okay got

it okay so let me open my

screen okay

okay so now you can stop your sharing

screen I will just try to open my screen

and show you that process how we can

easily make

the

lstd time 3 chart okay so let's

go so now can you see my

screen okay

sure okay okay excellent

okay it

loaded okay okay this time okay you did

not share your asset so for this things

okay I just simply take a random Mage

and try to show you that okay so I

simply remove these things and I import

my sh suppose taka City you can easily

use this code for other region also no

problem I simply inut my D City

boundary and first that I put the name

as r y r y okay so you can write the

code okay so then 2020 to

2022 and further you want to uh m. add

layer about these things okay done okay

good and further you are just applying

all of those

things okay

so mainly you just try to make the code

for LSD visualiz ation okay so now in

this time we are just make the time Ser

chart and observe what's the temporal

condition of land surface temperature

between this time period year of 2020 to

2020 this time period okay so for this

thing first of all we need to create a

band okay in this time here you can see

when I print this I can get only for

this 12 band you can see it create B1 B2

uh B3 these type of things but there is

no band about LST there is no band so

first of all you need to create the band

of

LST then use this band and we can easily

make the time chart so let's go how we

can EAS create this band first of all

okay I try to visualize the LSD why it

not showing here why let me

check so F bound F de median okay

suppose I take the less than 1% cloud

cover image create the median and then I

simply display this

image okay just I simply remove that and

then map. Center object I put the r y sh

file and now click in

okay it's

visualized so this is the study

area and further show

this that layer and we also make the ls

all of those things we can generate in

here fractional okay in this time I

generate

the mainly we generate about the band

okay so for doing these things it's very

easy uh just we write a variable suppose

I just write a

variable uh uh bar I put the variable

name

suppose add

LST and put a function

keyword function keyword and put the

element name uh image imz image and

further in this Carly bracket I just put

my argument okay so in this time my

argument is that I calculate all of

those things mainly calculate the uh

ndvi then thermal band fractional

vegetation imity and LST include all of

the things between this Carly bracket

and add it okay so for doing these

things we just simply copy the code from

here suppose I just simply copy from

ndvi just copy the same code all of

those simply copy copy also copy from

here and also

LST okay and finally okay just I simply

copy from here okay just simply copy

okay and these things I simply paste in

my early bracket so here you can see I

already make this early bracket okay

just past here so in this time what can

I do in this time using the element so

mainly my element is that image okay

using this image I do all of those

things so I simply put at that IMG image

and it's not needing this time because I

create the band I don't visualize so I

remove it it also not need uh it also

not need I simply remove these things

okay do not need so F that I simply go

to the below here you can see thermal

and in this time I simply change it I

put the imz my element name okay and

then further I did not show the layer of

the theral remove it it not need remove

and in this time I also calculated the

mean and Max of ndvi it also okay no

problem because I need the mean and max

value for calculating the fractional

vegetation so far that I simply

calculated the mean okay as well as also

calculated the max okay as well as in

this time you can see Roi okay stady

area I need to define the stady area

between this C bracket in this time you

can see this Carly bracket I need to

define the ROI my study area so just

take a variable suppose Roi and I simply

Define a study area suppose mainly it's

my this Roi I simply click on

here okay in this time I just simply

copy or if you want you can simply just

click on the three dot button you can

just click on here and you can get this

type of things I simply copy from here

this line simply copy from here because

this my r y this my St area just simply

go to the below and paste here okay so

this my Roi I also Define it okay it's

done nvi done thermal nvi done mean Max

it also done print net remove the print

value then Max Max not I simp I don't

need to print so simply remove that

forther fractional vegetation calculate

FB don't need to add the print and map

layer in the band remove that then imity

imity we are just calculate the imity

don't need to add the layer about the M

for that remove that further uh in this

time LST LST we just make the LST and I

put the LST say I put the name suppose

only for the short name I simply put

suppose uh LST okay after doing these

things you can simply write a function

return return this image IMG return this

image

add B add B this variable LSD simply

copy and paste here so now this is the

code from here start and go to from here

supp this scarly bracket between this

carar bracket uh it's generate the band

about the LSD band so now how I can get

the band this band you need to connect

with your image collection so mainly

here you can see this is our image

collection okay so this is our image

collection we got this

collection in

here yeah so this is your image

collection you can see it's my image

collection in this time I just simply

add a function

add I simply ma function and call the

function variable okay you can see

function variable name mainly where I

store it at LST you can see it's my

function variable simply copy and

connect in here so just simply go to the

below and here I can get these things

here you can see simply paste here after

the

collection paste

here okay so now in this time you can

see I simply print this

collection and check what happened about

this collection so for these things I

just simply uh okay just a simply site

not about that it's a uh new Okay now

click the run in this time you can see

it generate a new band okay this band

called The lstd Band We generate in this

time I can get the total 13 bands Okay

click on here and also click on here you

can see one B is generated it called the

LST okay okay so now we can easily

generate the

LST uh time Ser chart between this time

period so let's go we just make the time

Ser chart so for doing these things I

simply copy from here this line this

line I simply

copy because in this time uh we are also

add the visualization also okay and time

so just I simply create the another

I paste here I put the

co suppos time okay so now I just simply

make the timeart using this variable

okay this is my image collection so for

that I just simply use the function UI

dot chart dot image Dot spr and put all

of this argument first of all I just

make a dictionary

CIF and also C

bracket

in and further just

[Music]

simp okay so in this time okay I think

in this time it's B to

use in this time okay so in this time

it's a function basically this function

uh it generate the band okay so

basically which band we calculate in

here it generate the same band okay and

from here we can easily make the time

three chart also okay so in this time I

think it also better but if you want you

can also use the create this

function suppose in this time I simply

copy this same code from here

Cy the same

code and then simply paste here and all

those

things here you can

see I just simply put this name as a

geometry

yry okay

okay if I remove this previous one

geometry

TR now click to

run

now okay so now it's okay you can see in

this time uh in this time here you can

see uh this line mainly this line it

create the band of

LST okay so basically they create a

module or they create a function in this

time uh any region any region when you

want to make the time C chart just

simply copy the same code copy the same

code and then put your import your study

area as a geometry or any just put

rename it as a geometry then it easily

make the time Ser chart okay as well as

in in this time it also added the layer

you can see so mainly we also calculated

the average uh at the layer about the

LST okay if you want can also add here

the suppose mainly your visualization so

simply click on

here and custom suppose

98% and further you can also add the

color plated from you can see plated

button simply click on here simply click

here you can see mainly suppose I show

this color for low lstd then I show this

color

for and also show suppose uh this

color and also show suppose this

color suppose High let show this color

red color okay and further apply so now

it also added these things this color

added in here okay further simply just

import

and then from here simply copy this

visualization

parameter and paste after the object

name so this my object I simply paste

here and also put this layer name

suppose uh Daka

City LST so now click the

run so now we can see it visualize the

LST map of city as well as also

visualize about that

chart and see

okay and when you change this time

period simply you can see you can simply

put your time period on time period you

can easily get this result okay just

simply change it this time period okay

so this is the one way I send you this

code

link okay as well as I try to find out

the solution about that for the previous

code suppose okay um in this code what's

the

problem for our

chart this the one solution for creating

this time

chart so is it for only um LST or any

other analysis can only LST okay suppose

this function create only for the LST uh

monitoring because you can see LST for

the LST you have to write need lot of

code okay so for doing these things they

make the all of the code and store it in

a module they create a module so when

when anyone use this modu they can

easily get the LST as well as they can

easily create the time series chart of

the

LST it's very useful for um in can very

short time you can EAS create the LST

map as for any region and also create

this uh time Ser chart of the

LST okay okay okay okay sir thank you

very much okay so you try and I hope you

can do it using this second number of

port line okay okay okay thank you okay

have a good day okay bye

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