GIS Basics

To analyze and visualize geospatial data

Vector and Raster

Resolution

A single entity of vector data with both geometry and attribute data

A vector data format used to store geometric shapes

Three

Symbology

Spatial data

To calculate the area, perimeter, or length of features

Metadata

.aprx

False

False

False

False

False

False

False

False

False

False

False

False

People = Involved in the handling of geospatial data Methods and procedures = Steps to follow in GIS analysis Data = Information stored in a GIS system Hardware = Physical devices used in a GIS system

Vector data = Used for continuous data such as elevation, soil pH Raster data = Has almost unlimited attributes per data point

Points = Represent buildings, sample plots, a tree, etc Lines = Used to represent roads, rivers, drainages, etc Polygons = Used to represent areas, ponds, stands, lakes, boundaries, etc Nodes = Intermediate points of a line

Feature = A single entity of vector data with geometry and attribute data Feature Class = A group of features with the same geometry type Attribute = Data associated with a feature Field = A column in an attribute table

Resolution = The dimension of the pixel size in a raster data Shapefile = A vector data format used to store geometric shapes Attribute table = A table containing associated data for a feature Record = A row in an attribute table

Geometry = The physical representation of a feature Attribute data = Information associated with a feature Feature = A single entity of vector data with geometry and attribute data Vertex = An intermediate point of a polygon

Spatial data = Data that is referenced to particular positions on the earth's surface Geodatabase = A collection of geographic datasets that are stored in a file system folder or a relational database management system Symbology = The use of symbols to represent the attributes and features of a map layer Metadata = Data about the data or information that describes items in GIS

Contents pane = Lists all the layers and tables in the map or scene and shows how the features are represented Catalog pane = Allows access to all items associated with a specific project in one place .aprx = Project file that contains items you create in the project, such as maps and scenes .jpg = Image file extension

Calculate geometry tool = Calculates the area, perimeter, or length of features Summarize data toolset = Contains tools that calculate total counts, lengths, areas, and basic descriptive statistics of features and their attributes Define projection tool = Overwrites the coordinate system information (map projection and datum) stored with a dataset Heads-up digitizing (HUD) = Process involves the user manually tracing geographic features from a digital image or map on a computer screen

Layer = Stores the path to a dataset and other layer properties, but doesn't contain the actual data Point-of-event table = A tabular data structure where each row represents a specific point or event location Geospatial database = A set of digital base maps that describes the “geography” of the Earth’s surface Shapefile = A file type that must have a minimum of three file types: .shp, .shx, and .dbf

Row selection = The row is highlighted in blue in the attribute table Feature selection = The polygon or other feature is highlighted blue on the map, and the record is also highlighted blue in the attribute table Layer selection = The layer is highlighted in the contents pane Data selection = The data is highlighted in the catalog pane

.aprx = ArcGIS Pro project file .shp = Shapefile that stores feature geometry .jpg = Image file extension .dbf = Shapefile that stores attribute data