CHAPTER III
Methodology Of Research
21
III.4.3.2.
Treatment methodology of land use maps.
Steps of analysis and treatment of the satellite images :
 Acquisition of satellite images Landsat
- Year 1990 : USGS Landsat 5_TM with a Treatment level 1
- Year 2000 : USGS Landsat 5_TM with a Treatment level 1
- Year 2010 : USGS Landsat 5_TM with a Treatment level 1
- Year 2020 : USGS Landsat8_OIL with a Treatment level 2
 Layer staking : Toolbox > Open> selection of the 7 bands TIFF
 Image cropping: in order to to extract the study zone.
 Supervised classification: in ENVI software and with the Maximum Likelihood
classification.
III.4.3.4.
Environmental variables
Table 4: Environmental data collection and treatment.
Variable
Input Data
Treatment of data
Water resources
Collection of data of water
recourses including sanitation,
dams and drinking water supply.
Interpretation of the input
data in order to determine
the skikda’s vulnerability of
water.
Agriculture and
forests
Data of agriculture and forests
areas in the municipalities of
Skikda.
Presentation of the input
data in four maps using
ARCgis software in order to
compare between the
distribution of the
agriculture and forests area
in coastal and non-coastal
municipalities
•
Fishing
resources
The data explains the
ecological and pollution
level of the wilaya.