'Thiessen polygon' diaporamas de présentation

CHAPTAR-2 MEASUREMENT OF PRECIPITATION Ch. Karamat Ali (C.E) Department of Civil Engineering

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Lecture 4. Interpolating environmental datasets

Lecture 4. Interpolating environmental datasets. Outline creating surfaces from points interpolation basics interpolation methods common problems. Introduction. Definition:

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Grid-based Map Analysis (Spatial Analysis/Statistics)

Traditional GIS. Spatial Analysis. Forest Inventory Map. Erosion Potential (Surface). Points, Lines, Polygons Discrete Objects Mapping and Geo-query. Cells, Surfaces Continuous Geographic Space Contextual Spatial Relationships. Spatial Statistics. Traditional Statistics.

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Precipitation

Precipitation. Precipitation: water falling from the atmosphere to the earth. Rainfall Snowfall Hail, sleet Requires lifting of air mass so that it cools and condenses. . Mechanisms for air lifting. Frontal lifting Orographic lifting Convective lifting. Definitions.

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Spatial Interpolation

Spatial Interpolation. Chapter 13. Introduction. Land surface in Chapter 13 Also a non-existing surface, but visualized as a surface Statistical surface: precipitation, snow accumulation, water table, population density.

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Point Estimation: 2. Methods: 2.1 Nearest Neighbor (Thiessen Polygon)

Lecture 20: Spatial Interpolation III. Topics:. Point Estimation: 2. Methods: 2.1 Nearest Neighbor (Thiessen Polygon) 2.2 Triangulation (fitting a plane). References:. Chapter 11, Isaaks, E. H., and R. M. Srivastava, 1989. Applied

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