Question: What Are The 4 Standard Types Of Projections?

What are the 3 planes of projection?

[FIGURE 3-2] Projections of the point are made onto three of the surfaces that make up the box: the top or “H” (horizontal) plane, the front or “F” (frontal) plane, and the right side or “P” (profile) plane..

What is 1st and 3rd angle projection?

To get the first angle projection, the object is placed in the first quadrant meaning it’s placed between the plane of projection and the observer. For the third angle projection, the object is placed below and behind the viewing planes meaning the plane of projection is between the observer and the object.

What is 1st angle of projection?

First-angle projection: In this type of projection, the object is imagined to be in the first quadrant. Because the observer normally looks from the right side of the quadrant to obtain the front view, the objects will come in between the observer and the plane of projection.

How do you read 1st and 3rd angle drawings?

For the first angle projection, place the object in the first quadrant and in the third quadrant for the third angle projection. The object is placed between the plane of projection and observer for the first angle projection and between the object and observer for the third angle projection.

What is the most accurate flat map?

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 is isometric drawing?

An isometric drawing is a type of 3D drawing that is set out using 30-degree angles. It’s a type of axonometric drawing in which the same scale is used for every axis, resulting in a non-distorted image.

How do you start an orthographic drawing?

Creating an Orthographic ProjectionChoose a front view. … Decide how many views are needed to completely describe the object. … Draw the visible features of the front view.Draw projectors off of the front view horizontally and vertically in order to create the boundaries for the top and right side views.Draw the top view.More items…

What are the different types of projection?

6.4. 2 Types of Projection6.4. 2.1 Perspective projection. … 6.4. 2.2 Orthographic projection. … Fisheye projection. This is a spherical projection. … 6.4. 2.4 Ultra wide angle projection. … 6.4. 2.5 Omnimax projection. … 6.4. 2.6 Panoramic projection. … 6.4. 2.7 Cylindrical projection. … 6.4. 2.8 Spherical projection.

What are the 4 types of map projections?

Three of these common types of map projections are cylindrical, conic, and azimuthal.Cylindrical Map Projections. Cylindrical map projections are one way of portraying the Earth. … Conic Map Projections. … Azimuthal Map Projection.

What are the two main types of projection?

There are two main types of projection:1)Parallel and Convergent2)Perspective and Parallel3)Parallel and Orthographic4)Station-point and Perspective5)NULL

How many types of orthographic projections are there?

two types3. Types of orthographic drawing Orthographic drawing (also known as orthographic projection) consists of two types: first angle projection, and third angle projection.

Cylindrical ProjectionCylindrical Projection – Mercator One of the most famous map projections is the Mercator, created by a Flemish cartographer and geographer, Geradus Mercator in 1569.

What are the 3 principal views?

For this object three views are created: front, top, and right side. The views are aligned so that common dimensions are shared between views.

What is 3rd Angle Projection?

3rd Angle project is where the 3D object is seen to be in the 3rd quadrant. It is positioned below and behind the viewing planes, the planes are transparent, and each view is pulled onto the plane closest to it. The front plane of projection is seen to be between the observer and the object.

What are the 5 map projections?

Top 10 World Map ProjectionsMercator. This projection was developed by Gerardus Mercator back in 1569 for navigational purposes. … Robinson. This map is known as a ‘compromise’, it shows neither the shape or land mass of countries correct. … Dymaxion Map. … Gall-Peters. … Sinu-Mollweide. … Goode’s Homolosine. … AuthaGraph. … Hobo-Dyer.More items…•