gis editing and topology

Question 1

logical consistency

Answer 1

measure of how well data features represent real-world features, in particular with respect to topology

Question 2

dangle

Answer 2

line feature that fails to connect to another line feature, leaving a gap

Question 3

undershoot

Answer 3

type of dangle in which a line falls short of meeting another line

Question 4

overshoot

Answer 4

type of dangle in which a line crossses too far over a line that it is supposed to meet exactly

Question 5

pseudonode

Answer 5

topology error in which only two lines meet at a coincident node instead of three or more

Question 6

planar topology

Answer 6

association of feature classes in a feature dataset, established by rules regarding the spatial realtionships between features , such as not overlapping each other

Question 7

stream digitizing

Answer 7

method of entering vertices automatically during editing, instead of clicking to create each one

Question 8

modify

Answer 8

editing technique used to edit individual vertices to change the shape of a feature

Question 9

reshape

Answer 9

an editing technique used to re enter part of an existing line or polygon

Question 10

map topology

Answer 10

temporay spatial relationships developed between features during editing in ArcMap to facilitate editing in features with common nodes or boundaries

Question 11

cluster tolerance

Answer 11

a defined distance used in topological editing, causing vertices to be made coincident if they are closer together than the tolerance distance

Question 12

node edge

Answer 12

the beginning and endpoint of a line feature

Question 13

validation

Answer 13

step performed on a planar topology to test the features against the defined topology rules and to identify errors