2. Objective
• know the location of areas prone to landslides
in sumedang
Data Preparation
• Contour
• River
• Roads
• Soil
• Geology
• Landuse
3. Processing of Data
• Import Data
• Creating Coordinate System
• Vektor to raster
• Contour to slope
• Segment to buffer
• Spatial Multi Criteria Evaluation
• Layout Map
4. Impor Data
Firstly before process data, we must import data vektor “shp” if we want to using in ILWIS.
Kind of process is :
1. Click file on Menu bar then choose Import/Map then it would appear dialog box Import
2. Choose file vektor countour (shp)/write output then click OK
3. Now, do the process Import until all data finish import
Write Name Output
6. Creating Coordinate System
1. Click File/Create/Coordinate System
2. Give Name and Choose Coordsystem Projection
3. Choose CoordSystem Projection
Write Name
8. 4. Click Ellipsoid/WGS 84/OK
5. Click Datum/WGS 1984/OK
6. Change “Zone (48)” aggre with zone
located UTM Earth
7. Uncheck “Northem Hemisphere”
9. Input Coordinat to Vektor Data
1. Browse your folder data file. Right Click to Vektor Contour then choose properti
2. Change Coordinat System then choose Sumedang2
3. Click Apply and OK
4. Now, do the same process 1 – 3 for other vektors data (River, Road, Geology, Luse,
contour and Soil)
11. Changes Polygon and Segment to Raster
Before make rasters data we must choose attribute score for
classification
1. Right Click data choose Vektor Operation/Attribute Map
2. Change Attribute,choose SKOR_GEOL and give name to output then
choose Define or show
12. Cont.. 3. Right Click to Polygon Geology then
choose Polygon to Raster
4. Give “Name” to Output then
choose Georeference,
5. Change Coordinate System then
choose Sumedang2
6. Give name for Georeference then
Change Pixel size become 15 m/OK
7. Click Define and Show if you want
to see display output raster data.
8. Now, do the process 1 – 8 for other
polygon, but for contour your
choose attribute TINGGI and you
must choose same Georeference to
other data
14. Segment to raster
1. Right click data river then choose Rasterize/Segment to raster
2. Give name to Output Raster Map and then choose georeference
“Sumedang2”/Define
15. Creating River Buffer
1. Open Operation-list
2. Double click Distance calculation
3. Choose Source Map/ Give name/write the number 100 in coloum max on
the value range
4. Now, do the process Segment to Raster and Creating River for data Roads
Display River Buffer
16. Creating Slope using Contour Data Raster
1. Create an interpolated height map from segment contour lines
2. To calculate height differences in X-direction: start the Filter
operation, select the Digital Elevation Model as the input map and
select linear filter dfdx. Call the output map for example DX.
3. To calculate height differences in Y-direction: start the Filter
operation again, select the Digital Elevation Model as input map
and select linear filter dfdy. Call the output map for example DY.
4. To calculate a slope map in percentages from these maps DX and
DY, type on the command line of the Main window: SLOPEPCT =
100 * HYP(DX,DY)/ PIXSIZE(DEM)
5. Creating Domain to classification SLOPECT
17. Creating DEM
1. Right click contour_height then choose contour Interpolate
2. Give name of the Output then choose sumedang2 georeference
3. Define
19. Creating DFDX and DFDY
1
2
3
1. Right click DEM data then choose Image Processing/Filter
2. Input DEM data then filter name choose DFDX and give name to
output/Define
3. Now , do the same process for make data DFDY.
21. Creating SLOPECT
SLOPEPCT = 100 * HYP(DX,DY)/ PIXSIZE(DEM)
1. Copy formula SLOPECT on the command line of the Main window
“SLOPEPCT = 100 * HYP(DX,DY)/ PIXSIZE(DEM)” then change DX,DY
and DEM using your data
2. Click Define or Show
26. Spatial Multi Criteria Evaluation
1. Click Spatial Multi criteria Evaluation/Problem Analysis
2. Change name New Goal become to your goal
3. Click Insert Spatial Factor for creating faktor into your
group then write name
27. Cont..
4. Creating factor associated with the group that was created.
5. Input data maps that are relevant to the criteria that have been made, The
maps are used as input must have a georeferenced raster format and the
same. For inputting the map, double click on the pink up as shown below
Creating Factor
28. Making Standardization
1. Click Multi Criteria Analysis choose factor then click standardize..
2. For the case of industrial estates suitability select standardization "Cost"
as closer to the access roads leading to and from the site the better.
Then to select the method of "Goal“for X2 as the maximum distance.
29. Cont..
3. Group Factor for distance from the river using standardization 'Benefit'
and methods of Goal, enter the demarcation of the river that must not
be built X1 (eg 100m)
4. Now, do the procces “3” for the Soil, Geology and Land use but don’t
you change value on methods of Goal
30. Cont..
• Creating standardize for slope
• Add slope-skor then enter the range value 0-1
• Explain to them based on the steepness of slope, a value of 0 = 15 - > 45%,
but a value of 1 = 0 – 15%
• Click Refresh Attribute List then OK
31. Standardize all the factor
1. After all the factors and constraints in the standardization, the next step
is to give weight to each factor.
2. Next we sort of criteria which are most influential to the criteria of the
smallest
Click This
33. Display Output SMCE
A value of 1 indicates that the area prone to landslides and a value
of 0 indicates that the low area to landslides
34. Making Layout
1. Create domain for classification and combine Domain with Output
Data
2. Create Layout from existhing map, choose file then create layout
35. Cont.
3. Click Insert to make map view, legenda and other information from
map.
4. After making other legenda and map information, click file then choose
export to Bitmap/write name/OK
