GIS Quiz 5

GIS (Geographic Information System)

A system for collecting, storing, analyzing, and displaying spatial data.

Layer

A collection of geographic features in GIS, such as roads or water bodies.

Spatial Data

Data that represents locations and shapes of features on a map.

Attribute Data

Information about spatial features, stored in tables.

Vector Data

Data stored as points, lines, or polygons.

Raster Data

Data stored in a grid of pixels.

Attribute Table

A table containing information about spatial features.

Record (Row)

Represents a single geographic feature in an attribute table.

Field (Column)

Represents an attribute of a geographic feature.

Sorting

Arranging data in ascending or descending order.

Field Calculation

Creating new values based on existing attribute data.

Statistics Calculation

Finding mean, median, max, min, and standard deviation.

String (Text Data)

A data type used for names and labels.

Integer

A data type used for whole numbers.

Float

A data type for decimal numbers with lower precision.

Double

A data type for decimal numbers with high precision.

Selection Tools

Methods to choose specific features in GIS.

Select by Attributes

Choosing features based on data values.

Select by Location

Choosing features based on their spatial relationship.

Switch Selection

Inverting selected and unselected features.

Clear Selection

Deselecting all features.

Arcade

A scripting language used in ArcGIS for custom calculations and selections.

Query

A request to extract specific data from a GIS database.

Identify Tool

A tool that displays attributes of a selected feature.

Table Join

Linking attribute tables to enhance GIS data.

One-to-One (1:1) Join

A single record in one table matches one record in another.

Many-to-One (M:1) Join

Multiple records in one table link to a single record in another.

One-to-Many (1:M) Join

A single record links to multiple records in another table.

Many-to-Many (M:M) Join

Multiple records in both tables match multiple records.

Summarized Join

Aggregating data before joining to simplify relationships.

Relate

A method for linking data without merging tables.

Identify by Shape

Selecting features by drawing a custom shape on the map.

Metadata

Information about a dataset, including source, format, and creation date.

Vector Attribute Table

A table linked to vector features (points, lines, polygons).

Raster Attribute Table

A table linked to raster cells containing values like elevation or temperature.