Representing the Real World in Geographic Information System
Learn how you can represent the real world in geographic information systems, and data types in this free online course.
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CertificationView course modules
This course will begin by introducing you to the meaning of data, the kind of data that can be handled by geographic information systems, the different data models, and examples of data models. This includes the vector data model, the two types of vector data models which are the spaghetti data model and the topological data model. You will learn about representing the real world in the surface model, surface representation, and how you can represent the real world in terms of surface models. This will lead you to digital terrain, the digital surface model, and the digital elevation model.
Next, you will understand how to do georeferencing, the different kinds of systems, and different projections. You will be familiar with geoid, the different kinds of the geoid, and how we look at the geoid as a reference point. You will also be familiar with datums, how we look at datums, and certain coordinate systems. Moving on, you will be knowledgeable about maps, how maps are represented; the meaning of a map, and what you should look out for in a map.
Lastly, you will be brought up to speed about coordinate reference systems, geographical coordinate-system, geodetic datum, and representation of the earth. You will gain an understanding of the components of the coordinate reference system and the two important systems in which earth is referenced. You will further understand the things that you have to look at before you start analyzing a particular map. This will then lead you to how to identify a map, and the scale on a map, even without knowing the scale.Start Course Now
Data Types and Data Models
Data Types and Data Models - Learning Outcomes
Types of Data
Vector Data Model
Raster Data Model
Triangulated Irregular Network
Data Types and Data Models - Lesson Summary
Querying, Georeferencing and Map Projections
Querying, Georeferencing and Map Projections - Learning Outcomes
Querying and Georeferencing
Elevation, Relative and Discrete Referencing
Maps and Numbering
Querying, Georeferencing and Map Projections - Lesson Summary
By the end of this course, you should be able to:
- Discuss how you can represent a real-world in geographic information system
- Identify the different types of data n GIS
- List the different types of data models in GIS with examples
- Explain the meaning of a data model as used in GIS
- Define spatial data as used in geographic information system
- Explain the meaning of topology as used in geographic information system
- Describe how to do a georeferencing in geographic information system
- Define geoid and datums as used in geographic information system
- Identify the two types of georeferencing in GIS
- Define continuous georeferencing as used in GIS
- Describe relative georeferencing and polar georeferencing as used in GIS
- List the three major categories by which discrete georeferencing can be done
All Alison courses are free to enrol, study and complete. To successfully complete this Certificate course and become an Alison Graduate, you need to achieve 80% or higher in each course assessment. Once you have completed this Certificate course, you have the option to acquire an official Certificate, which is a great way to share your achievement with the world. Your Alison Certificate is:
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