Representation of Simple Spatial Features in Vector Model: Types of Features in Vector Model (Especially for GATE-Geospatial 2022)

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A vector data model uses the geometrics objects of point, lines, and area to represent simple spatial features.

The fundamental concept of vector GIS is that all geographic features in the real work can be represented either as:

This Diagram Shows Feature Type

Point

A point is stored by its location (x, y) together with the able attribute of this point. For ex. 4 points below has their (x, y) locations and each point has attribute of deep amount of water contamination.

This Diagram Shows Feature Type Point

Line

Line entities can be defined as all features built up of straight-line segments made up of two or more coordinates. The simplest line required the storage of a begin point and an end point.

This Diagram Shows Feature Type Line

Area

An Area of polygons can be represented in various ways in a vector database. The simplest way to represents a polygon is an extension of the simple chain, i.e.. to represents each polygon as a set of xy coordinates on the boundary. Area is closed figures that represent shape and location of homogeneous feature such as states, soil type, and land use zones.

This Diagram Shows Feature Type of Area

A vector structure can provide a flexible and accurate representation of an object due to the fine resolution obtainable with coordinate points.

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