Table of Contents
What is Mercator projection method?
The Mercator projection is a cylindrical map projection presented by the Flemish geographer and cartographer Gerardus Mercator in 1569.
What is map projection in PDF?
A map projection is used to portray all or part of the round Earth on a flat surface. This cannot be done without some distortion. Every projection has its own set of advantages and disadvantages.
How do you calculate Mercator projection?
The formula for Mercator’s projection is T(ϕ, θ)=(θ, ln(|sec(ϕ) + tan(ϕ)|)). Of course, there are a huge number of map projections. Two more cylindrical projections are shown in figure 2.
What is the problem with Mercator projections?
The popular Mercator projection distorts the relative size of landmasses, exaggerating the size of land near the poles as compared to areas near the equator. This map shows that in reality, Brazil is almost as large as Canada, even though it appears to be much smaller on Mercator maps.
Why is Mercator projection used?
This map, with its Mercator projection, was designed to help sailors navigate around the globe. They could use latitude and longitude lines to plot a straight route. Mercator’s projection laid out the globe as a flattened version of a cylinder. All the latitude and longitude lines intersected at 90-degree angles.
What are Mercator chart used for?
This projection is widely used for navigation charts, because any straight line on a Mercator projection map is a line of constant true bearing that enables a navigator to plot a straight-line course.
What are the 4 map projection properties?
These map projection properties are area, shape, distance, and direction. These four map projection properties described for facets of a map projection that can either be held true, or be distorted. Of the four projection properties, area and shape are considered major properties and are mutually exclusive.
What is the difference between normal Mercator and Transverse Mercator?
Description. The transverse Mercator projection, also known as the Gauss-Krüger projection, is similar to Mercator except that the cylinder touches the sphere or ellipsoid along a meridian instead of the equator. The result is a conformal projection that does not maintain true directions.
Why is the Mercator map used?
This map, with its Mercator projection, was designed to help sailors navigate around the globe. They could use latitude and longitude lines to plot a straight route. Mercator’s projection laid out the globe as a flattened version of a cylinder.
What is the meaning of Mercator?
Mercator (countable and uncountable, plural Mercators) (chiefly attributive) Pertaining to an orthomorphic map projection, in which meridians appear at right-angles to the equator, and lines of latitude are horizontal lines whose distance from each other increases with distance from the equator.
Why is a Mercator map useful?
Is Mercator map accurate?
Because the linear scale of a Mercator map increases with latitude, it distorts the size of geographical objects far from the equator and conveys a distorted perception of the overall geometry of the planet.
Who uses a Mercator map?
The Mercator projection was mainly used for maps. This made it possible for the entire globe to be drawn on a flat sheet. It is also used for marine navigation since the lines of constant direction appear as straight lines on the map.
What type of map projection is Mercator?
Introduction
| Projection | Type | Comments |
|---|---|---|
| Mercator | cylindrical | Created in 1569 Best Used in areas around the Equator and for marine navigation |
| Robinson | pseudo-cylindrical | Created in the 1963 Best Used in areas around the Equator |
| Transverse Mercator | cylindrical | Created in 1772 Best Used for areas with a north-south orientation |
Why is the Mercator projection popular?
It became the standard map projection for navigation because it is unique in representing north as up and south as down everywhere while preserving local directions and shapes. The map is thereby conformal. As a side effect, the Mercator projection inflates the size of objects away from the equator.
What is the best map projection?
AuthaGraph. This is hands-down the most accurate map projection in existence. In fact, AuthaGraph World Map is so proportionally perfect, it magically folds it into a three-dimensional globe. Japanese architect Hajime Narukawa invented this projection in 1999 by equally dividing a spherical surface into 96 triangles.
What are 3 types of map projections?
Conceptually, there are three types of surfaces that a map can be projected onto: a cylinder, a cone, and a plane. Each of these surfaces can be laid flat without distortion. Projections based on each surface can be used for mapping particular parts of the world.
Why is the Mercator projection used?
What is the main difference between Mercator and UTM projection?
The transverse Mercator map projection is an adaptation of the standard Mercator projection which flips the cylinder 90 degrees (transverse). The UTM projection flattens the sphere 60 times by shifting the cylinder central meridian 6° for each zone. This gives cartographers a map to work with always in meters.
What are the advantages and disadvantages of a Mercator map?
Advantage: The Mercator map projection shows the correct shapes of the continents and directions accurately. Disadvantage: The Mercator map projection does not show true distances or sizes of continents, especially near the north and south poles. Who Uses it? Sailors use a Mercator map to navigate.
What is a Mercator projection and what is its purpose?
The Working of Mercator Projection. You can understand the construction of the Mercator projection by taking a cylinder with a globe inside.
What are the pros and cons of the Mercator projection?
Mercator Projection. Pros – Shows true direction and shape Cons – Landmasses in higher latitudes appear larger than they are and Landmasses in lower latitudes appear smaller than they are Ship navigators might use this. Robison Projection.
Who would use a Mercator projection?
Web Mercator, Google Web Mercator, Spherical Mercator, WGS 84 Web Mercator or WGS 84/Pseudo-Mercator is a variant of the Mercator projection and is the de facto standard for Web mapping applications. It rose to prominence when Google Maps adopted it in 2005. It is used by virtually all major online map providers, including Google Maps, Mapbox, Bing Maps, OpenStreetMap, Mapquest, Esri, and many others. Its official EPSG identifier is EPSG:3857, although others have been used historically.
What was the original purpose of the Mercator projection?
The Mercator Map. The Mercator projection was developed in 1569 by Gerardus Mercator as a navigational tool.