In GIS, a 'raster' data model differs from a 'vector' model in that raster:
Choose the correct answer
Only stores points, not areas
Uses regular grid cells for continuous spatial data; vector uses points/lines/polygons for discrete features
Cannot store elevation data
Can only be used for road networks
Correct Answer
B. Uses regular grid cells for continuous spatial data; vector uses points/lines/polygons for discrete features
Why is this the answer?
Raster: divides space into regular grid cells (pixels), each with attribute value. Good for: continuous data (DEM, satellite imagery, slope, rainfall). Resolution = cell size. Vector: represents features as points, lines, polygons with precise coordinates. Good for: discrete features (roads, buildings, boundaries). Raster: fast overlay analysis, requires more storage for fine resolution; Vector: compact, precise boundaries.
Related Surveying MCQs
More solved Surveying questions for AE/JE Civil Engineering exams.
- A 'Digital Elevation Model' (DEM) is used in GIS for:
- 'Contour interval' selection for a topographic survey depends on:
- The 'EDM' (Electronic Distance Measurement) instrument measures distances using:
- The 'photogrammetric control' (ground control points) in aerial survey are required for:
- The 'photogrammetric stereomodel' from two overlapping aerial photos allows...
- The 'corrections' applied to measured chain/tape lengths include all EXCEPT:
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