GIST 52 pre final question bank

To enable 'write access' on a file one should: (A) move the data from an external drive to their local c drive (B) Single left click a file, then right click over the file to access properties and uncheck 'read only' (C) Single left click a folder, then right click over the folder to access properties and uncheck 'read only' (D) both B or C (E) both A and B

(D) both B or C -(B) Single left click a file, then right click over the file to access properties and uncheck 'read only' -(C) Single left click a folder, then right click over the folder to access properties and uncheck 'read only'

Planar Topology requires which of the following: All features must occur on a two-dimensional surface There can be no overlaps among lines or polygons in the same layer Lines may not cross over or under other lines At each line crossing there must be an intersection (vertex or node) All of the above

-All features must occur on a two-dimensional surface -There can be no overlaps among lines or polygons in the same layer -Lines may not cross over or under other lines At each line crossing there must be an intersection (vertex or node)

Which is the smaller-scale map: 1 inch to 1 mile 1:5,000 1:12,000 1:24,000

1 inch to 1 mile

Which is the larger-scale map: 1 inch to 1 mile 1:5,000 1:12,000 1:24,000

1:5,000

Which map will typically show more detail? A large scale map A small scale map

A large scale map

What is root mean square error (RMSE)? A measure of the error propagation as a mathematical effect of navigation satellite geometry on positional measurement precision. A measure of the difference between locations that are known and locations that have been interpolated or digitized. A measure of the unavoidable misrepresentation of one or more metric properties of a map, such as area, direction, distance, shape, or scale.

A measure of the difference between locations that are known and locations that have been interpolated or digitized.

_____________ refers to the closeness of a measured value to a known value. Accuracy

Accuracy

In order set the topological constraint of "no gaps" between features between layers, which rule must be used: (hint: refer to ArcGIS Topology Poster) Must Not Have Gaps Must not Overlap Must be covered by the feature class of Area boundary must be covered by boundary of

Area boundary must be covered by boundary of

____________ ______________ allows the user to specify the units in real-measurements (meters, feet etc) to provide a more intuitive display of features. Midpoint Snapping Classic Snapping Tangent Snapping Midpoint Snapping

Classic Snapping

Topological rules can be applied within geodatabases and to shapefiles. True False

False

The below are all examples of: Fused: multiple features may be grouped to form a larger feature. Simplified: boundary of shape details are lost or "rounded off." Displaced: feature may be offset to prevent overlap or to provide a standard distance between mapping symbols. Omitted: Small features in a group me be excluded from the map Exaggerated: standard symbol sizes are often chosen which are much larger when scaled than true to real world dimensions. Digitization errors Feature generalization Hard copy map distortion Inappropriate map scale

Feature generalization

Is the true transformation error at any point on the map likely to be larger, smaller, or about equal to the RMSE? Smaller About equal Larger

Larger

What are control points? Control points define the geographic boundaries for displaying GIS information. These points define the boundaries of the data and represent the top, bottom, left, and right coordinates edges of the extent. These are the edges of the map extent. One of various locations on a paper or digital map that has known coordinates and is used to transform another dataset spatially coincident but in a different coordinate system into the coordinate system of the control point. Control points remain through all pyramid levels of a terrain dataset. They are never filtered or thinned away. This ensures they are present in the terrain surface regardless of what resolution pyramid level is being used. Hence the always preserve the elevation (z) values at their specific location.

One of various locations on a paper or digital map that has known coordinates and is used to transform another dataset spatially coincident but in a different coordinate system into the coordinate system of the control point.

__________ identifies the closeness of two or more measurements to each other. Accuracy Precision

Precision

Who is known as the Father of GIS?

Roger Tomlinson

____________ are small gaps that are often a by product of imprecise digitization of features. Overlaps Slivers Overshoots Undershoots

Slivers

Is media deformation more problematic with large-scale paper maps or small scale paper maps when conducting manual digitization? Small scale paper maps. Large scale paper maps.

Small scale paper maps.

Digitization positional errors may be less (say 2 meters) than the required positional accuracy of the data (say 5 meters) yet still prevent: The correct geo-referencing, ruber-sheeting, or transformation of the data. The generation of correct networks or polygons. The creation of topologic rules.

The generation of correct networks or polygons.

What is topology? Topology is a system of interconnected elements, such as lines connecting points the supports routing and connectivity analysis. Examples include highways connecting to cities, streets interconnected to each other at street intersections, and sewer and water lines that connect to houses. Topology is shape-invariant spatial properties of line or area features such as adjacency, contiguity, and connectedness, often recorded in a set of tables. Topology allows you to create features that connect to each other so your edits are more accurate, with fewer errors.

Topology is shape-invariant spatial properties of line or area features such as adjacency, contiguity, and connectedness, often recorded in a set of tables.

Digitizing requires that the editor have permissions to modify old files or to write new files in a workspace and data on a hard drive may be 'write protected' so that it cannot be edited.

True

Snapping options allow you to set the snapping tolerance in map units or pixels. True False

True

The Error Inspector window enables a user to sort errors by rule set, see the count of errors associated with a specific rule, show errors within visible extent only and toggle between what are errors and what have been marked as exceptions. Additionally, the interface enables the user to zoom to a specific error on the map. True

True

When digitizing a polygon, each time you left click, you are placing a 'vertex' for a polygon. Double clicking will end the curation of the shape and "close" the polygon.

True

Which of the following transformations will likely have the smallest average error at a set of independent test points? affine, RMSE = 14.23 affine, RMSE = 9.8 2nd-order polynomial, RMSE = 9.7 3rd-order polynomial, RMSE = 6.45

affine, RMSE = 9.8

When you select other functions during a digitizing or editing session, in order to start editing again - you will often have to: right click on the layer being edited re-set snapping settings re-activate the data layer and click on the kind of feature you'd like to add

re-activate the data layer and click on the kind of feature you'd like to add