Question Examples for a Geography Class

Question Examples for a Geography Class

Document details
Category: Geography Essay
Subcategory: Regional Geography
Words: 1578
Pages: 8

What is meant by geodetic datum? (1 mark)Geodetic datums (1) were created to define the size and shape of the Earth and the origin and orientation of the coordinate systems used to map the planet. Hundreds of different datums have been used to frame position descriptions since the first estimates of the Earth's size were made by Aristotle. Datums have evolved from those describing a spherical Earth to ellipsoidal models derived from years of satellite measurements.Modern geodetic datums range from flat-earth models used for plane surveying to complex models used for international applications which completely describe the size, shape, orientation, gravity field, and angular velocity of the Earth. While cartography, surveying, navigation, and astronomy all make use of geodetic datums, the science of geodesy is the central discipline for the topic.Referencing geodetic coordinates to the wrong datum can result in position errors of hundreds of meters. Different nations and agencies use different datums as the basis for coordinate systems used to identify positions in geographic information systems, precise positioning systems, and navigation systems. The diversity of datums in use today and the technological advancements that have made possible global positioning measurements with sub-meter accuracies requires careful datum selection and careful conversion between coordinates in different datums.httpwww.colorado.edugeographygcraftnotesdatumdatumf.html According to Princeton University (2), httpswww.princeton.eduachaneytmvewiki100kdocsDatum(geodesy).html A geodetic datum (plural datums, not data) is a reference from which measurements are made. In surveying and geodesy, a datum is a set of reference points on the Earth's surface against which position measurements are made, and (often) an associated model of the shape of the Earth (reference ellipsoid) to define a geographic coordinate system. Horizontal datums are used for describing a point on the earth's surface, in latitude and longitude or another coordinate system. Vertical datums measure elevations or depths. In engineering and drafting, a datum is a reference point, surface, or axis on an object against which measurements are made.What is meant by NAD27 and where it is...

“A good sample is better than the advice"
Hire EliteEssayWriters to Write Your Assignment!
similar examples
An Overview of the Lesotho-Maseru Geography and People in Africa
Category: Geography
785 words
2 pages
Lesotho - MaseruReligion and Language About 90 percent of the people of Lesotho are Christians, mainly Roman Catholics, Lesotho Evangelicals, and Anglicans. Most of the remainder follow traditional beliefs. English and Sesotho, a Bantu language, are the country s official languages.GOVERNMENT Under the terms of the constitution of 1965, which ...
An Introduction to the Culture and Geography of Gibraltar
Category: Geography
1858 words
4 pages
IntroductionGibraltar has loomed large in the history books for 3000 years. Its name comes from Tarik, the leader of the Arabic army that invaded Spain in the eighth century. Over the centuries the Arabic name Gibel Tarik has altered to its present form of Gibraltar. The Rock remained in Arab ...
An Overview of the Geography and the Physical Characteristics of the Earth’s Surface in a Certain Area
Category: Geography
2492 words
4 pages
Geography refers to the physical characteristics of the earths surface in a certain area. These features include the nature and distribution of life on Earth, including human life and the effects of human activities on the physical appearance of Earth. It is significant to note that the World is full ...
An Introduction to the Geography of the Okefenokee Swamp
Category: Geography
465 words
1 pages
The Okefenokee Swamp is located in Georgia and has played a major part in state's history. Many people have lived in the swamp, from the Indians to the White settlers. People have tried to drain it and cut down the trees but it still exists today. We need to take ...
An Introduction to the Geography of the Congo Basin
Category: Geography
2037 words
6 pages
The Congo basin is a vast area of land in Africa which straddles the Equator. Its historical records begin with the 'discovery of the Congo River by the Potugese'.(Nelson 19942) This land was inhabited long before European arrival, the Mongo and other indigenous people of this area already lived in ...
A Look at the Types of Landslides and Examples of Major Landslides
Category: Geography
380 words
1 pages
Landslides When a lot of soil, rocks and other stuff slides down a hill it is called a landslide. Landslides are caused by rain and melting snow that goes into cracks in the earth on top of a mountain or hill. Then the earth is weakened because the water makes ...
GET EVEN A BETTER ESSAY!
It's a lifetime discount time!
15% off
Save this discount code:
15OFFJUST4U