Lec 2- Data models

Question 1

What is a raster, used for what?

Answer 1

A raster is one of two basic data structures that uses a field divided into a grid of cells or pixels, used to represent continuous (or discrete) data. such as temperatures or elevations.

Question 2

What is vector, what used for?

Answer 2

a vector is one of two basic data structures that uses points, polygons, and lines. used for discrete data (People Places defintite things)

Question 3

5 functional Elements of GIS

Answer 3

Data acquisition, Preprocessing, Data-management, Manipulation, and analysis, and Product generation.

Question 3

5 functional Elements of GIS

Answer 3

Data acquisition, Preprocessing, Data-management, Manipulation, and analysis, and Product generation.

Question 4

Define Abstraction

Answer 4

The principle of ignoring aspects of the subject that are no relevant to the current purpose

Question 5

Discrete data

Answer 5

(object) clearly defined object such as a tree or house

Question 6

Continuous Data

Answer 6

field, an object that exists everywhere and may vary continuously, temperature, elevation