GIS Data Analysis Interview Questions and Answers

1 :: What is spatial interpolation?

► 1. The process of establishing values for areas outside the boundary of an existing set of data points.
► 2. The process of modelling spatial pattern from a set of one or more data layers
► 3. The process of establishing values for areas between an existing set of discrete observations
► 4. The process of establishing a statistical relationship between two spatially correlated variables

The process of establishing values for areas between an existing set of discrete observations.

Is This Answer Correct?    17 Yes 3 No

2 :: Which of the following are considered the main problems facing overlay operations in GIS?

► 1. Selecting threshold criteria
► 2. Topological inconsistencies
► 3. The Modifiable Arial Unit Problem (MAUP)
► 4. Processing overheads
► 5. Visual complexity

Selecting threshold criteria
The Modifiable Arial Unit Problem (MAUP)
Visual complexity

Is This Answer Correct?    9 Yes 1 No

3 :: Assuming a pair of binary raster data layers, which of the following could be used as the equivalent of a Boolean AND overlay in cartographic modelling?

► 1. Layer 1 – layer 2
► 2. Layer 1 + layer 2
► 3. Layer 1 / layer 2
► 4. Layer 1 * layer 2

Layer 1 – layer 2
Layer 1 + layer 2
Layer 1 * layer 2

Is This Answer Correct?    5 Yes 4 No

4 :: What is point-in-polygon overlay?

► 1. A method interpolating point data
► 2. An overlay method used to determine which points lay within the boundary of a polygon
► 3. An overlay method used to determine the distance between a point and it is nearest neighboring polygon
► 4. An overlay method used to reclassify polygon data

An overlay method used to determine which points lay within the boundary of a polygon

Is This Answer Correct?    11 Yes 1 No

5 :: Which of the following overlay methods would you use to calculate the length of road within a forest polygon?

► 1. Erase
► 2. Union
► 3. Line-in-polygon
► 4. Point-in-polygon

Line-in-polygon

Is This Answer Correct?    9 Yes 3 No