Getting to Know Geoinformatics Course

GIS software is only one of the components of a GIS.

• True

• False

Map projection is a process of converting from:

• a three-dimensional surface to a two-dimensional surface.

• a two-dimensional surface to a three-dimensional surface.

• a two-dimensional surface to a two-dimensional surface.

• None of the above.

Answer explanation

Map projection is the process of converting from the 3D surface of the Earth to the 2D surface of paper or screen

Which of the following statements is true?

• A coordinate system is based on a map projection.

• A map projection is based on a coordinate system.

• Map projection and coordinate system are unrelated.

The standard coordinate system for GPS reading is:

• NAD27

• NAD83

• WGS84

• none of the above

Which of the following is true about a line feature?

• A line feature is made of lines

•  A line connects two end points.

• The shape of a line is made of connected points.

• All of the above.

Which data structure stores raster data as a matrix and writes the cell values into a file by row and column?

• Cell by cell

• Run length code.

• Quad tree

• None of the above.

Which of the following is an example of a multiband raster?

• An elevation raster

• A vegetation raster

• A satellite image

Answer explanation

a satellite image is a composite of several measurers in different frequency ranges

Which of the following statements is NOT true about the polygon feature?

• A polygon is a two-dimensional object.

• A polygon has the properties of area and perimeter.

• A polygon may form a hole within another polygon.

• None of the above.

Some GPS receiver can collect the elevation in addition to the horizontal position of a point on the Earth's surface.

• True

• False

A conformal projection preserves the property of:

• relative size

• local shapes

• distances

• none of the above

Answer explanation

Conformal projections preserve local shapes and angles, but distort relative surfaces and distances