Remote Sensing and Gis in Agriculture

7/23/2019 Remote Sensing and Gis in Agriculture

1/15

REMOTE SENSING ANDGIS IN AGRICULTURE

PRESENTE


2/15

MONITORING CROP STATUS

Identifying Stressed Plants. Chlorophyll is essential part of photosynthesis. Amount of Chlorophyll is estimated. By om!ining more than one !ands of the reorded

remote sensing data "e an reate #egetation indiesand estimate rop status.


3/15

CONTD...

Estimating "ater ontent from remote sensing $ater is essential for plant gro"th. As a result stomata is released !y the proess of

transpiration.

If "ater is insuffiient the plant is stressed and the heat isnot remo#ed.

This heat an !e deteted !y RE%&TE SENSIN' !y using

parts of spetrum that is sensiti#e to heat.

'reen ( a#erage.

!lue ( suffiient

red ( lo".


4/15

CONTD...

Com!ating pests and diseases Addition to plant under stress and la) of "ater "e

an also find plant effeted !y pests. It is ahie#ed !y om!ining agriultural )no"ledge and

remote sensing. The red part in the !elo" piture sho"s the plants

effeted !y pests. Destrution aused !y pests redues leaf area inde*.

$e an identify +AI hene "e an find the inset

atta) at an early stage.


5/15


6/15

CROP IDENTIFICATION

$hy do "e need to identify rops,, As it inreases the finanial !enefits if the ountry. To plan imports and e*ports.

Cadastral mapping( It is nothing !ut mapping of the !oundaries of thefield.

Cadastral maps are in #etor format and pro#ides

some speial data.

It is generally used !y national authorities.


7/15


8/15

CONTD...

-o" to identify rop types "ith Remote

sensing,, egetation is generally green in olour !ut shades of

green is different for #arious rops.


9/15

True olour image /alse olour image


10/15

CONTD...

Remote sensing data re0uired( To identify the type of rop "e need to )no" the

gro"th yle of partiular rops. Also "e ha#e to )no" ho" the rops reflet the near

infra red at eah of their #arious gro"th stages.

%ay 1Belgium2 August 1Belgium2


11/15

CONTD...

If "e ompare the same fields in the t"o images3 "e

an see that in some ases the signal is different. /ields that appear red are full of #egetation3 "hereas

those that appear !lue either ha#e #ery little or no

#egetation at all. By ha#ing )no"ledge on "hen the rop is ulti#ated

and har#ested and !y studying 4 or more images from

the same gro"th period "e an find the type of rops.

Image lassifiation.


12/15

ESTIMATING CROP YIELD

Estimating rop yield using only remote

sensing( There are t"o "ays to estimate the rop yield. They

are( using only remote sensing and other also uses

some e*tra data.

In may In august


13/15

CONTD...

In may3 rops are at pea) of their gro"th. In august3 plant is fousing its energy in produing the

rop and not produing green !iomass. Chlorophyll !rea)age and !ro"n3 yello" olour

appears to na)ed eye. -o" an "e estimate rop yield !y seeing

remote sensing image,, Comparing satellite images "ith rop yield data of the

rop fields in image.

The image "as proessed and #egetati#e inde* is

formed and ompared to rop yield. The estimation o!tained is limited that partiular

period of time only.


14/15

The use of NDI 1normali5ed differene #egetation

inde*2 is fast and easy method.

/alse olour image NDI image


15/15

Than) you

Documents

Remote Sensing and Gis in Agriculture