gis chapter 3

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1. Polygons are three-dimensional and are constructed from elevation points and contour lines Answers: True False
FALSE
2. Which of the following coverages only require feature IDs and pairs of x-,y- coordinates:polygon,TIN,line, point
POINT
3. If an arc joins two nodes, the nodes are said to be adjacent and incident with the arc.  True False
TRUE
4. Which of the following involve the use of the z axis? Answers: polygons,DEMs,polylines TIN
5. TIN data structure includes L-poly and R-poly Answers: True False
FALSE
6. If an arc joins one node to another in the direction toward the other one (say from 15 to 16), it is given an adjacency matrix number of ________
1
7. The points where arcs meet or intersect are called _____________Answers: TINS,arcs,joints,nodes
nodes
8. Which of the following cannot contain multiple nodesAnswers: lines, polygons,polylines, points
points
9. The number ___ in the matrix means an arc is incident from a node, ____ means an arc is incident to a node Answers:
1;-1
10. If you zoom in infinitely on a point... Answers: only the ends disappear, the edges disappear it becomes so small that it can no longer be resolvedit is still there
it is still there
11. geometric objects used by vector models include all but which of the following. Answers: lines, points, polygons, circles
circles
12. Graphic files store: class data, spatial data, attribute data, elevation data
spatial data
13. The _______ is a commonly used vector data model for terrain mapping and analysis, especially for 3-D display. Answers: polyline, DEM, polygon, TIN
tin
14. In a polygon arc list, an arc that outlines a hole is given a value of _____Answers:
0
15. The vector data model for ArcGIS is called a Answers: TIN, geodatabase, coverage, shapefile
GEODATABASE
 Author: natelh ID: 327683 Card Set: gis chapter 3 Updated: 2017-01-27 12:47:39 Tags: gis Folders: Description: gis Show Answers: