Question

What is difference between spatial and non-spatial data? Expalinn with examples.

Answer 1

Answer.
Spatial vs. Non-spatial Data

1.Spatial Data

Data that define a location. These are in the form of graphic primitives that are

usually either points, lines, polygons or pixels.

· Spatial data includes location, shape, size, and orientation.

o For example, consider a particular square:

its center (the intersection of its diagonals) specifies its

location

its shape is a square

the length of one of its sides specifies its size

the angle its diagonals make with, say, the x-axis specifies its

orientation.

· Spatial data includes spatial relationships. For example, the arrangement

of ten bowling pins is spatial data.

2.Non-spatial Data

Data that relate to a specific, precisely defined location. The data are often

statistical but may be text, images or multi-media. These are linked in the GIS

to spatial data that define the location.

· Non-spatial data (also called attribute or characteristic data) is that

information which is independent of all geometric considerations.

o For example, a person’s height, mass, and age are non-spatial data

because they are independent of the person’s location.

o It’s interesting to note that, while mass is non-spatial data, weight is

spatial data in the sense that something’s weight is very much

dependent on its location.

It is possible to ignore the distinction between spatial and non-spatial data.

However, there are fundamental differences between them:

o spatial data are generally multi-dimensional and auto correlated.

o non-spatial data are generally one-dimensional and independent.

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Answer 2

Spatial Data is data that identifies or is directly or indirectly referenced to a geographic location on earth. These locations could be natural, man-made, in the oceans or in the atmosphere. It is also known as Geospatial Data. Examples are coordinates and topology.

Non-spatial Data is data that cannot be referenced or identified, to any location on earth or its surrounding atmosphere. It is just numbers, characters, or logical statements.