Curvature Type of Slope for Remote Sensing Analysis: Profile, Planform and Standard (Especially for GATE-Geospatial 2022)

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The Curvature function displays the shape or curvature of the slope. There are three types of curvature:

Diagram Shows Curvature Type

Profile

The profile curvature is parallel to the slope and indicates the direction of maximum slope. It affects the acceleration and deceleration of flow across the surface.

  • A negative value (A) indicates that the surface is upwardly convex at that cell, and flow will be decelerated.
  • A positive profile (B) indicates that the surface is upwardly concave at that cell, and the flow will be accelerated.
  • A value of zero indicates that the surface is linear (C)
This Diagram Shows Profile Curvature

Planform

The Planform curvature (commonly called plan curvature) is perpendicular to the direction of the maximum slope.

  • A positive value indicates the surface is laterally convex at that cell.
  • A negative plan (B) indicates the surface is laterally concave at that cell.
  • A value of zero indicates the surface is linear (C)
Diagram Shows Planform Curvature

Standard

The Standard curvature combines both the profile and planform curvatures. The profile curvature affects the acceleration and deceleration of flow and, therefore, influences erosion and deposition. The plan curvature influences convergence and divergence of flow. Considering both plan and profile curvature together allows you to understand more accurately the flow across a surface.

This Diagram Shows Standard Curvature Generates Both Profile …

In above diagram, the columns show the planform curves and the rows show the profile curve. The planform columns are positive, negative, and 0 – going from left to right. The profiles curves are negative, positive, and 0-going from top to bottom.

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