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APPLICATIONS OF GIS EXAM QUESTIONS WITH 100% VERIFIED ANSWERS
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APPLICATIONS OF GIS EXAMQUESTIONS WITH 100% VERIFIED
ANSWERS
.shp file* - ANSWER - a vector data storage format (shapefile) for storing
the location, shape, and attributes of geographic features.
- stored in a set of related files and contains one feature class.
active data frame* - ANSWER The data frame currently being worked on
- for example, the data frame to which layers are being added. The
active data frame is highlighted on the map, and its name is shown in
bold text in the table of contents.
active layer - ANSWER The layer that is currently active.
arc* - ANSWER 1. On a map, a shape defined by a connected series of
unique x,y coordinate pairs. An arc may be straight or curved.
2. a coverage feature class that represents lines and polygon
boundaries. One line feature can contain many arcs. Arcs are
topologically linked to nodes and to polygons. Their attributes are stored
in an arc attribute table (AAT). Nodes indicate the endpoints and
intersections of arcs; they do not exist as independent features.
Together, the from-node and the to-node define the direction of the arc
ArcGIS* - ANSWER A suite consisting of a group of geographic
information system (GIS) software products produced by ESRI. It is a
system for working with maps and geographic information. It is used for:
creating and using maps; compiling geogrpahic data; analyzing mapped
information; sharing and discovering geographic information; ;using
maps and geogrpahic information in a range of applications; and
managing geographic information in a database.
ArcGIS documents - ANSWER it is the map blah blah
,area feature - ANSWER One of the three types of features: point, line,
and area. The area feature is a 2D plane produced by a polygon of a
certain shape.
arithmetic function - ANSWER A type of methematical function that
performs a calculation on the values of cells in an input raster. There are
six arithmetic functions in ArcGIS Spatial Analyst: Abs, Int, Float, Round
up (Ceil), Round down (Floor) and Negate
Operators - ANSWER Arithmetic - *, /, -, +
Boolean - True or False
Relational - ==, >, <, <>, >=, <=
ASCII files* - ANSWER "American Standard Code for Information
Interchange". The de facto standard for the format of text files in
computers and on the internet that assigns an 8-bit binary number to
each alphanumeric or special character. ASCII defines 256 possible
characters.
attributes* - ANSWER Nonspatial information about a geogrpahic
feature in a GIS, usually stored in a table and linked to the feature by a
unique identifier. For example, attributes of a river might include its
name, length, and sediment load at a gauging station.
attribute query* - ANSWER A request for records of features in a table
based on their attribute values
attribute table - ANSWER A database or tabular file containing
information about a set of geographic features, usually arranged so that
each row represents a feature and each column represents one feature
attribute. In raster datasets, each row of an attribute table corresponds
to a certain zone of cells having the same value. In a GIS, attribute
tables are often joined or related to spatial data layers, and the attribute
values they contain can be used to find, query, and symbolize features
or raster cells.
attribute table: field and records - ANSWER Field are the columns.
Records are the rows.
, auto-label* - ANSWER A tool that automatically labels a certain layer
based on a selected field (usually NAME)
bitmap* - ANSWER An image format in which one or more bits represent
each pixel on the screen. The number of bits per pixel determines the
shades of gray or number of colors that a bitmap can represent
Boolean expression* - ANSWER an expression, named for the English
mathematician George Boole (1815-1864), that results in a true or false
(logical) condition. For example, in the Boolean expression "HEIGHT >
70 AND DIAMETER = 100," all locations where the height is greater than
70 and the diameter is equal to 100 would be given a value of 1, or true,
and all locations where this criteria is not met would be given a value of
0, or false.
Boolean operator - ANSWER a logical operator used in the formulation
of a Boolean expression. Common Boolean operators include AND,
which specifies a combination of conditions (A and B must be true); OR,
which specifies a list of alternative conditions (A or B must be true);
NOT, which negates a condition (A but not B must be true); and XOR
(exclusive or), which makes conditions mutually exclusive (A or B may
be true but not both A and B).
byte - ANSWER The smallest addressable unit of data storage within a
computer; almost always equivalent to 8 bits and containing one
character.
CAD - ANSWER (Computer-Aided Design). A computer-based system
for the design, drafting, and display of graphical information. Such
systems are mostly commonly used to support engineering, planning,
and illustrating activities.
CAD feature class - ANSWER A read-only member of a CAD feature
dataset, comprised of one of the following: polylines, points, polygons,
multipatch, or annotation. The feature attribute table of a CAD feature
class is a virtual table comprised of select CAD graphic properties and
any existing field attributes values.
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