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GEOG 6290 (1)
Final

# GEOG 6290 Final: Final exam review 1 Premium

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School
George Washington University
Department
Geography
Course
GEOG 6290
Professor
Marie Price
Semester
Spring

Description
Geospatial Statistics Final Exam Review 1 Interpolation – using points with known values to estimate values at other unknown points Different methods: - global (useall thepoints in calculatingavalue)vs. local (usejust somepointsin calculating a value) - exact (fits every observation point exactly) vs. inexact (doesn’t fit every point exactly) Deterministic forms of interpolation: 1. Inverse Distance Weighted (IDW) – local, exact, tends to make bullseye 2. Global Polynomial (trend surface analysis) – global, inexact, orders = how many bends in a surface 3. Local Polynomial – local, inexact, order = number of bends in a surface 4. Radial Basis Functions (Splining) – local, exact, fits a bendable line through all the points - Con: can’t assess the quality of interpolation, and can’t tell beforehand if best values have been chosen to perform the analysis
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