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Pertemuan 06 Fungsi Analisis pada SIG

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

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  1. Pertemuan 06Fungsi Analisis pada SIG Matakuliah : T0234 / Sistem Informasi Geografis Tahun : 2005 Versi : 01/revisi 1

  2. Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : • Menunjukkan fungsi-fungsi analisis dari suatu pemodelan dengan SIG (C3, TIK06)

  3. 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

  4. Jenis Fungsi Analisis (1) • Reclassification • Buffering • Neighborhood • Integrating data-Map Overlay • Spatial Interpolation • Analysis of Surfaces • Network Analysis

  5. 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.

  6. 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 :

  7. 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)

  8. 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)

  9. 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

  10. Jenis Fungsi Analisis (7) Network Analysis : • Location-allocation Model • Route Tracing • Quantitative Spatial Analysis • Exploratory & Descriptive Statistics • Predictive Statistics • Prescriptive Statistics

  11. Pengukuran dalam SIG • Pengukuran Raster • Length • Pythagorean Distance • Manhattan Distance • Proximity Distance • Perimeter • Area • Pengukuran Vector • Distance • Area

  12. 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

  13. Permasalahan dalam analisis data Permasalahan dalam vector & raster overlay : • The modifiable areal unit problem. • Ecological fallacy • Selecting threshold criteria • Visual complexity

  14. Penutup • Mahasiswa diharapkan telah mampu menunjukkan fungsi-fungsi analisis dari suatu pemodelan dengan SIG.

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