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Pertemuan 06 Fungsi Analisis pada SIG. Matakuliah : T0234 / Sistem Informasi Geografis Tahun : 2005 Versi : 01/revisi 1. Learning Outcomes. Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menunjukkan fungsi-fungsi analisis dari suatu pemodelan dengan SIG (C3, TIK06).

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pertemuan 06 fungsi analisis pada sig

Pertemuan 06Fungsi Analisis pada SIG

Matakuliah : T0234 / Sistem Informasi Geografis

Tahun : 2005

Versi : 01/revisi 1

learning outcomes
Learning Outcomes

Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu :

  • Menunjukkan fungsi-fungsi analisis dari suatu pemodelan dengan SIG (C3, TIK06)
outline materi
Outline Materi
  • Materi 1 : Jenis Fungsi Analisis
  • Materi 2 : Pengukuran dalam SIG
  • Materi 3 : Perbedaan analisis data Raster dan Vektor
  • Materi 4 : Permasalahan dalam analisis data
jenis fungsi analisis 1
Jenis Fungsi Analisis (1)
  • Reclassification
  • Buffering
  • Neighborhood
  • Integrating data-Map Overlay
  • Spatial Interpolation
  • Analysis of Surfaces
  • Network Analysis
jenis fungsi analisis 2
Jenis Fungsi Analisis (2)

Reclassification :

  • Usually to produce a new simple code image from a complex original image, is a very useful technique to be used in further analysis.
jenis fungsi analisis 3

Points

Line

Area

Jenis Fungsi Analisis (3)

Buffering :

  • Is used to identify a zone of interest around an entity or set of entities. Buffer zones around :
jenis fungsi analisis 4
Jenis Fungsi Analisis (4)

Neighborhood :

  • The values of individual cells are altered on the basis of adjacency

E.q. : Filtering, will change the value of a cell based on the attributes of neighboring cells.

Applying 3x3 square filter to recalculate value for cell c4 (in the right)

Minimum Filter c4 = 1

Maximum Filter c4 = 3

Mean Filter c4 = 1.89

Modal Filter c4 = 2 (most frequently occurring class)

Diversity Filter c4 = 3 (number of different classes : 1,2,3)

jenis fungsi analisis 5
Jenis Fungsi Analisis (5)

Integrating data-Map Overlay :

  • Vector Overlay
  • Point in Polygon
  • Line in Polygon
  • Polygon on Polygon
  • Raster Overlay
  • Point in Polygon (using add)
  • Line in Polygon (using add)
  • Polygon on polygon (using add)
  • Polygon on polygon (Boolean alternative)
jenis fungsi analisis 6
Jenis Fungsi Analisis (6)

Spatial Interpolation :

  • Local or Global
  • Exact or approximate
  • Gradual or Abrupt
  • Deterministic or stochastic
  • Analysis of Surfaces :
  • Calculating Slope & Aspect
  • Visibility Analysis
jenis fungsi analisis 7
Jenis Fungsi Analisis (7)

Network Analysis :

  • Location-allocation Model
  • Route Tracing
  • Quantitative Spatial Analysis
    • Exploratory & Descriptive Statistics
    • Predictive Statistics
    • Prescriptive Statistics
pengukuran dalam sig
Pengukuran dalam SIG
  • Pengukuran Raster
    • Length
      • Pythagorean Distance
      • Manhattan Distance
      • Proximity Distance
    • Perimeter
    • Area
  • Pengukuran Vector
    • Distance
    • Area
analisis data raster vektor
Analisis data Raster & Vektor

Perbedaan analisis data Raster dan Vektor :

  • Users need to be aware of the strengths & weakness of different type of GIS (raster & vector).
  • Have limitations of some of the functions they routinely apply (e.q. length measurements).
  • GIS analyst should be able to produce useful answers by combining data analysis functions into an analysis scheme.
  • New analysis tools frequently start out in the academic domain
permasalahan dalam analisis data
Permasalahan dalam analisis data

Permasalahan dalam vector & raster overlay :

  • The modifiable areal unit problem.
  • Ecological fallacy
  • Selecting threshold criteria
  • Visual complexity
penutup
Penutup
  • Mahasiswa diharapkan telah mampu menunjukkan fungsi-fungsi analisis dari suatu pemodelan dengan SIG.