Gis Test 2 Review Cards

Front 1

ArcCatalog

Back 1

- the ArcGIS application used for file management (browse, organize, rename, etc. GIS files).

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Attribute

Back 2

the overall or general name of a characteristic used to describe a feature

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Attribute value

Back 3

the specific quantity or quality that an attribute is assigned for a particular feature, such a numeric value, or a description entered by hand or selected from a menu

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Attribute Table

Back 4

a table (much like a spreadsheet) that contains attribute information linked to a spatial feature. Usually, each feature is linked to one record or row in the table. Each record has one or many attributes.

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Active theme

Back 5

A window or theme is "active" in ArcMap when the ArcMap application is "focused" on that particular object; some functions will only work on the "active" Theme; a theme is active when it is clicked on

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Base station

Back 6

a GPS receiver that is at an known, fixed location that is used to derive correction information for nearby portable GPS receivers (rovers).

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Database file (*.dbf)

Back 7

format used for attribute data in ArcMap; a collection of data organized in a systematic way.

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Data Dictionary

Back 8

a file, used in collecting GPS data, that contains a list of features, their attributes and values that the attributes are assigned.

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Differential Correction

Back 9

correction method applied to receiver data using known point to determine a correction factor; corrects for atomospheric delays, clock errors, and ephemeris errors.

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GIS (Geographic Information System)

Back 10

A collection of hardware, software, geographic data, and personnel designed to capture, store, update, manipulate, analyze, and display geographically referenced information.

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GPS

Back 11

Global Positioning System; a navigational system used to determine location relative to the surface of the earth.

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KML (Keyhole Markup Language)

Back 12

a file format used to display geographic data in an earth browser or mapping site such as Google Earth

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Label (Annotation)

Back 13

text information used to identify a feature or location in a spatial layer

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Line or Arc

Back 14

a series of connecting X, Y positions (length, and no area)

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Multipath (error)

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signals bounce off local objects such as chain link fences; multipath errors cannot be corrected

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Node

Back 16

(1) the end or beginning point of a line, or (2) an intersection of two or more lines

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Point

Back 17

a single location having an X, Y (and sometimes - Z) position (no area, or length)

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Polygon

Back 18

one or more connecting lines that form a single, closed spatial feature (area and perimeter)

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Query

Back 19

A logical statement used to select features or records (e.g. from an attribute table)

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Raster

Back 20

Data format consisting of rows and columns forming cells

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Record

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One line (or row) of an attribute table; each record is linked to one feature in a layer and can have one or more columns.

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Rover

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a hand-held GPS receiver carried in the field

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Real-time DGPS

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differential correction 'on-the-fly' using a network of ground-based reference stations that broadcast correction factors (e.g see SBAS).

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SBAS (Satellite Based Augmentation System)

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a general term referring to a system that supports wide-area or regional augmentation (e.g. differential correction) through the use of additional satellite-broadcast messages. The WAAS utilizes an SBAS to broadcast correctio factors for real-time differential correction.

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Shapefile (*.shp)

Back 25

a geospatial vector data format used in ArcMap GIS software. Each shapefile can contain multiple features of the same type of geometry (points or lines or polygons) and requires an accompanying *.dbf and *.shx file in order to open in ArcMap.

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Track

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a series of connected waypoints (i.e. a line) logged on a recreational GPS. Tracks are usually a 'bread-crumb' trail of

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Vector

Back 27

Data format consisting of points, lines, and polygons

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Waypoint

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a point of known location. Coordinates of points recorded on a recreational GPS rover are referred to as waypoints.

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Elements of a Cartographic Presentation

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Data frame
Title
Legend or Key
Scale
Data Source
Map Credit
Neatline or Border
North arrow

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Data frame

Back 30

this is the map image itself, the representation or view you intend to show your audience.

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Title

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the name of the map; titles should say something about the subject or theme of the map presentation. The title can also include a time element if the map represents conditions at a particular point in time or a time period.

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Legend or Key

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an explanation of colors or symbols used in the map. Generally, a “Legend” refers to descriptions of what colors represent on a map and “Key” refers to descriptions of symbology. Either term may be used if the there is a mix of colors and symbols.

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Scale

Back 33

a representation of the relation between distance on a map and distance on the ground. Scale can be expressed as a representative fraction (e.g. 1/24,000), as an equivalency (e.g. 1 in. = 2,000 ft.), or as a graphic (e.g. a bar scale).

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Data Source

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the source or originator (e.g person or agency) of the data used in the analysis or represented on the map.

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Map Credit

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the author or person who prepared the map (you) and the date the map was prepared.

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Neatline or Border

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the neatline encompasses the data frame (i.e. it is around the map image); a border usually encompasses everything in the layout.

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North arrow

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last, but not least, an arrow indicating north. This is almost always true north, though magnetic north (current or as existed at the time the data were created) may also be used.