GIS Unit III

What is the data stream?

• The process by which maps are transferred between GIS platforms.

• The flow of data from producer to GIS.

• The process by which raw spatial data is processed into an integrated GIS database.

• The flow of data from one user to another.

Keyboard entry is no longer used in GIS projects.

• True

• False

In point mode digitising points are added automatically at set time or distance intervals as the user moves the cursor across the map.

• True

• False

A pseudonode is a node which can be removed from a vector dataset without affecting the topology.

• True

• False

The node (2) in the above topology can be called as

• Pseudo node

• Arc node

• Dangle node

• Polygon node

What topology rule can be applied for removing the errors (Red colored region).

• Must not have gaps

• Boundary must be covered by

• Contains point

• Must not overlap

What rule can be applied to remove the error in the above spatial data?

• Must not overlap

• Must not have gaps

• Must not overlap with

• Must be covered by

What rule can be applied to remove the errors in the above spatial data?

• Point must be covered by line

• Point must be covered by boundary of

• Must be coincident with

• Point must be coincident

What rule can be applied to remove the error in the above spatial data?

• Must not overlap

• Must not self overlap

• Must not intersect

• Must not self intersect

What rule can be applied for removing the errors in the above spatial data?

• Must be covered by

• Must cover each other

• Must not overlap

• Must not overlap with