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Lieselot Vandenhoute, Lector Aardrijkskunde, Katho departement RENO
Sint-Jozefstraat 1, B-8820 Torhout, BelgiumTel.: ++32 (0)50 23 10 30 Fax.: ++32 (0)50 23 10 40
Email: lieselot.vandenhoute@katho.be
Remote Sensing in Geography Education, Remote Sensing in Geography Education, illustrated by a vegetation dynamics studyillustrated by a vegetation dynamics study
(Kikwit region, Democratic Republic of the Congo)(Kikwit region, Democratic Republic of the Congo)
Step 1Step 1: Situation of the study area
Geographical situation of the study area in the Democratic Republic of the Congo
Kolwezi .. Lubmbashi
ANGOLA
ZAMBIA
Atlantic Ocean
. KINSHASA
. Kisangani
. Ilebo
. Mbandaka
Kindu .
. Kananga. Kikwit. Matadi
Bukavu .Goma .
Kalemie .
REP. OF THE CONGOGABON
CAMEROON
CENTRAL AFRICAN REPUBLIC SUDAN
UG
AN
DA
TA
NZ
AN
IA
RWA
BUR
Congo . Bumba
. Gbadolite
Lual
aba
Lake Tanganyika
0 200 400 kmN
The increasing population growth shown in this graph is thought to have an enormous impact on the natural vegetation.
Evolution of the population of the Democratic Republic of the Congo
0
10000
20000
30000
40000
50000
60000
year
popu
lati
on
(x10
³)
population evolution
Source: to Lahmeyer, J., 2002. Congo (Kinshasa). Historical demographical data of the whole country. Population Statistics, http://www.library.uu.nl/wesp/populstat/Africa/congokic.htm. 06/09/2002.
This area was chosen because of its dense population in comparison with other parts of the country. The increase of a dense rural population should have a clear impact on the natural vegetation.
Savannah plateau
Dense forest in
river valley Foto from Prof. Dr. Rudi Goossens. Universiteit Gent, Faculteit
Wetenschappen, Opleiding Geografie. 1988.
Step 2Step 2: Collecting Satellite Imagery
N0 12500 meter
0 12500 meterN
False Colour Composite of a SPOT scene taken on the 2nd of July 1987. Spatial resolution: ± 20x20 m. Geometric accuracy: RMSE 59,500 m.
False Colour Composite of an ASTER scene of the 21nd of July 2001 Western part of the study area. Resampled spatial resolution: ± 20x20 m. Geometric accuracy: RMSE 88,530 m.
0 12500 meterN
Palmerais
Forêt claire
Forêt galerie
Digitised vegetation categories on the Corona mosaic.
0 12500 meterN
Step 3Step 3: Image Classification
0 12500 meterN
NDVI from –1 up to –0,60NDVI from –0,59 up to –0,20NDVI from –0,19 up to 0,00NDVI from 0,01 up to 0,20NDVI from 0,21 up to 0,40NDVI from 0,41 up to 0,60NDVI from 0,61 up to 0,80NDVI from 0,81 up to 1,00
NDVI-classification of the SPOT scene.
N0 12500 meter
NDVI-classification of the ASTER scene.
NDVI from –1 up to –0,60NDVI from –0,59 up to –0,20NDVI from –0,19 up to 0,00NDVI from 0,01 up to 0,20NDVI from 0,21 up to 0,40NDVI from 0,41 up to 0,60NDVI from 0,61 up to 0,80NDVI from 0,81 up to 1,00
Multitemporal Colour Composite
N0 12500 meter
Exercise 1:Create a Satellite Images mosaic.
Exercise 2: Digitize all tree vegetation on the Corona image.
Exercise 3:Create a (false) colour composite selecting the correct the spectral bands.
Students learn how to:-Work with digital images-Interpret digital images-Work with photo editing software-Reduce the inaccuracies EXTRA- Georeference
Students learn how to: -Interpret a Corona image-Work with Remote Sensing software or GIS such as ILWIS or ArcView, …-Label the digitised objects and work with attributes
Students learn how to:- Create a (false) colour composite- Select the correct spectral bands- Stretch the spectral bands to become a clear and readable image- Interpret a (false) colour composite- Work with Remote Sensing software or GIS such as ILWIS or ArcView, …EXTRA:- Remove noise
Exercise 4:Create a NDVI image.
Exercise 5:Create a multi temporal colour composite.
Students learn how to:- Create an NDVI image- Combine different spectral bands- Visualise an NDVI image- Interpret an NDVI image- Work with Remote Sensing software or GIS such as ILWIS or ArcView, …
Students learn how to:-Work with the colour cube- Interpret satellite images- Interpret combined satellite images- Create binary images- Work with Remote Sensing software or GIS such as ILWIS or ArcView, …
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