Lesson 3.1 Attribute Editing and Topology

The process of modifying, correcting, or updating information stored in a GIS attribute table

The table that contains descriptive information associated with GIS features

The GIS editing mode used to make changes to feature attributes or geometry

The tool used to modify attribute values directly in a GIS table

The tool used to perform bulk calculations or updates to attribute fields

A new attribute column added to a GIS layer to store additional information

The process of checking attribute values for missing or incorrect information

A spatial data concept that describes how geographic features relate to one another

The topological relationship describing how line features connect through nodes

The topological concept in which arcs that connect to surround an area define a polygon

The topological relationship in which polygons sharing a boundary are considered adjacent

The intersection point where two or more arcs meet in a topological data model

A line segment between two nodes that has its own identification number and references its from-node and to-node

The node where an arc begins

The node where an arc ends

The topological model in which arcs are used to construct polygons and each arc is stored only once

The topological model describing the relationship between arcs and their connecting nodes

A polygon that represents the external area outside the study area in polygon topology

The spatial relationship in which two polygons share a common boundary

A polygon error in which the boundary does not completely loop back upon itself

A polygon error in which an area does not contain any attribute information

A polygon error caused when the shared boundary of two polygons does not meet exactly

A line error in which two lines do not extend far enough to meet each other

A line error in which a line extends beyond the feature it should connect to

The node left at the end of a line when lines fail to connect properly

The topology rule requiring polygon boundaries not to overlap

The topology rule requiring polygon features to have no empty spaces between them

The topology rule requiring connected line features to meet properly without unintended dangling ends

The topology rule requiring identical or repeated features to be absent

The QGIS tool used to detect and review topology errors in a vector dataset

The QGIS tool that can correct multiple geometry errors in a semi-automatic manner

The editing technique that uses the Vertex Tool, Node Tool, or Snapping to correct geometry

The QGIS function that helps features connect accurately to nearby vertices or line segments

The process of checking a dataset after corrections to determine whether topology errors remain

The process of combining or joining features into one geometry when correcting errors

The process of removing an unwanted duplicate or sliver feature

The type of GIS data quality concern involving whether spatial features are correctly located or shaped

The type of GIS data quality concern involving whether attribute information is correct

The purpose of applying topology rules to GIS data

The GIS concept that allows computers to determine and analyze spatial relationships among features

The type of analysis that relies heavily on nodes, connectivity, and topological relationships to determine routes

The type of analysis that uses topological relationships to determine adjacency, clustering, and nearest neighbors