GIS For Engineering (MCQ) 5

Question 1

In GIS, what does OGC stand for, and why is it important for engineering applications?

Accepted Answer

Open Geospatial Consortium; it defines interoperability standards for spatial data and services

Answer

The Open Geospatial Consortium (OGC) publishes open standards such as WMS, WFS, and GeoJSON that ensure different GIS systems can exchange spatial data seamlessly.

Question 2

A GIS analyst overlays a parcel layer with a flood zone layer and needs to keep ALL parcels, showing which ones intersect the flood zone and which do not. Which tool is most appropriate?

Accepted Answer

Spatial Join

Answer

A Spatial Join appends flood zone attributes to all parcels based on their spatial relationship, preserving all parcels regardless of whether they intersect the flood zone.

Question 3

What is the primary advantage of a file geodatabase over a shapefile for engineering GIS projects?

Accepted Answer

File geodatabases support field names longer than 10 characters, subtypes, domains, and relationship classes

Answer

File geodatabases overcome shapefile limitations: field names are not restricted to 10 characters, and they support domains, subtypes, topology, relationship classes, and attachments.

Question 4

Which interpolation method is considered an exact interpolator because it passes through all input data points?

Accepted Answer

Spline

Answer

Spline (specifically regularized spline) is an exact interpolator that fits a mathematically smooth surface that passes exactly through all input data points.

Question 5

In GIS coordinate systems, what is a 'false easting' and 'false northing' used for?

Accepted Answer

To shift the origin so all coordinates in the zone are positive

Answer

False easting and northing are constant values added to coordinates to eliminate negative values within a projected zone, simplifying calculations and avoiding sign errors.

GIS - Geographic Information System Practice Test

GIS - Geographic Information System Practice Test

GIS For Engineering (MCQ) 5