Intro to GIS Tools and Processes_Book 2

1. An area that is drawn at a uniform distance around a feature is called a

Buffer

Census

Clip

Dissolve

(Unit 2, Lesson 4)

Explanation

(Unit 2, Lesson 4)

2. Add-on software products that run with ArcGIS to enhance its capabilities are called

Extensions

Layouts

Scripts

Tables

Extensions are add-on software products that enhance the capabilities of ArcGIS. These extensions provide additional functionality and tools that are not included in the core ArcGIS software. They can be used to perform specialized tasks, such as spatial analysis, 3D visualization, or data management. By installing and using extensions, users can customize and extend the functionality of ArcGIS to better suit their specific needs and requirements.

Explanation

Extensions are add-on software products that enhance the capabilities of ArcGIS. These extensions provide additional functionality and tools that are not included in the core ArcGIS software. They can be used to perform specialized tasks, such as spatial analysis, 3D visualization, or data management. By installing and using extensions, users can customize and extend the functionality of ArcGIS to better suit their specific needs and requirements.

3. Map elements such as a legend, scale bar, north arrow, etc. are needed for a map layout because

They are legally required for all printed maps.

A map cannot be printed from ArcMap without these elements

Otherwise the data contained in the map cannot be fully understood.

They serve to map the map layout more attractive.

(Unit 2, Lesson 1)

Explanation

(Unit 2, Lesson 1)

4. A component of an ArcGIS project that displays data about map features in tabular form is called a

Attribute Table

Layout

Project

View

(Unit 2, Lesson 1 )

Explanation

(Unit 2, Lesson 1 )

5. The process of cropping the extent of one layer to the extent of another layer is called

Clipping features

Dissolving features

Inputting features

The process of cropping the extent of one layer to the extent of another layer is referred to as "clipping features". This involves using the boundary of one layer to define the extent of another layer, resulting in the second layer being trimmed or clipped to match the boundary of the first layer. This technique is commonly used in GIS (Geographic Information System) applications to limit the display or analysis of data to a specific area of interest.

Explanation

The process of cropping the extent of one layer to the extent of another layer is referred to as "clipping features". This involves using the boundary of one layer to define the extent of another layer, resulting in the second layer being trimmed or clipped to match the boundary of the first layer. This technique is commonly used in GIS (Geographic Information System) applications to limit the display or analysis of data to a specific area of interest.

6. If you could not find the exact school that you were looking for on an ArcMap map display, what would be the best (quickest) way to find it?

Use the Identify tool and click on the schools

Open the school table, click on the record, then look for the selected school on the map.

Use the Measure to find the shortest route

Use the Measure to find the closest school.

(Unit 2, Lesson 1)

Explanation

(Unit 2, Lesson 1)

7. Collections of geographic data that are alike are called

Charts

Layers

Projects

Scripts

(Unit 1, Lesson 1 )

Explanation

(Unit 1, Lesson 1 )

8. Which of the following is an example of a quantitative attribute?

Address

Name

Population

Telephone number

Population is an example of a quantitative attribute because it can be measured and expressed as a numerical value. It represents the total number of individuals or objects in a particular group or area. In contrast, address, name, and telephone number are examples of qualitative attributes as they are descriptive in nature and cannot be measured or expressed numerically.

Explanation

Population is an example of a quantitative attribute because it can be measured and expressed as a numerical value. It represents the total number of individuals or objects in a particular group or area. In contrast, address, name, and telephone number are examples of qualitative attributes as they are descriptive in nature and cannot be measured or expressed numerically.

9. Joining tables is a very important feature in ArcView because

Data needed for analysis may be contained in two tables

Only one table may be used in each ArcView project.

Some data may be incorrect

It must be done in every ArcView project.

(Unit 2, Lesson 2)

Explanation

(Unit 2, Lesson 2)

10. What would be the best zoom function to use if you wanted to get a closer look at some selected records on the map?

Zoom In

Zoom to Full Extent

Zoom to Layer

Zoom to Selected Features

(Unit 2, Lesson 1)

Explanation

(Unit 2, Lesson 1)

11. What is the data file extension of an ArcMap project file?

.apr

.doc

.mxd

.prj

(Unit 1, Lesson 1)

Explanation

(Unit 1, Lesson 1)

12. A component of an ArcMap project that contains layers that form interactive maps is called a

Attribute Table

Chart

Data frame

View

(Unit 2, Lesson 1 )

Explanation

(Unit 2, Lesson 1 )

13. Where can the symbology for a data file be specified in ArcMap?

Data Frame Properties

Effects

Layer Properties

Page Setup

(Unit 2, Lesson 1 )

Explanation

(Unit 2, Lesson 1 )

14. The act of using computer drawing tools to draw feature data using remotely sensed image data is called

Clipping

Dissolving

Heads-up digitizing

Georeferencing

(Unit 2, Lesson 3)

Explanation

(Unit 2, Lesson 3)

15. What would be the best legend type to use on an ArcView map layout to plot ballparks in a county?

Graduated color

Graduated symbol

Single symbol

Unique values

(Unit 2, Lesson 1)

Explanation

(Unit 2, Lesson 1)

16. Measurements taken in GIS analysis may differ based on the coordinate system and map projection used because

The features being measured would probably differ

The units of measurement would be different.

Different map projections have different degrees of distortion.

Locations on the face of the Earth are constantly changing making accurate measurement impossible.

(Unit 2, Lesson 5)

Explanation

(Unit 2, Lesson 5)

17. In order to display data from a table of longitude/latitude coordinates in ArcMap, what option must be used?

Display X,Y Data

Geocoding

Geoprocessing

Georeferencing

To display data from a table of longitude/latitude coordinates in ArcMap, the option that must be used is "Display X,Y Data." This option allows the user to input the table containing the coordinates and specify which columns represent the X and Y values. ArcMap then plots the data points on the map based on the provided coordinates, allowing for visualization and analysis of the spatial data.

Explanation

To display data from a table of longitude/latitude coordinates in ArcMap, the option that must be used is "Display X,Y Data." This option allows the user to input the table containing the coordinates and specify which columns represent the X and Y values. ArcMap then plots the data points on the map based on the provided coordinates, allowing for visualization and analysis of the spatial data.

18. What is the technique that can be used to attach features to elements such photos, documents and web pages so that by clicking on a feature the element can be opened and viewed?

Attaching

Hyperlinking

Joining

Relating

Hyperlinking is the technique that can be used to attach features to elements such as photos, documents, and web pages. By clicking on a feature, the element can be opened and viewed. Hyperlinks are commonly used in websites to navigate between different pages or to open specific content within a page. They provide a convenient way to connect and access related information or resources.

Explanation

Hyperlinking is the technique that can be used to attach features to elements such as photos, documents, and web pages. By clicking on a feature, the element can be opened and viewed. Hyperlinks are commonly used in websites to navigate between different pages or to open specific content within a page. They provide a convenient way to connect and access related information or resources.

19. Satellite images, scanned data and photographs are examples of what type of data?

Feature data

Image data

Theme data

Vector data

(Unit 1, Lesson 3 )

Explanation

(Unit 1, Lesson 3 )

20. The various models that are used to approximate the shape of the Earth are called

Spheres

Coordinates

Datums

Ellipsoids

The term "datums" refers to the various models or reference systems that are used to approximate the shape of the Earth. These datums are used in geodesy and cartography to accurately represent the Earth's surface. Spheres, coordinates, and ellipsoids are not used to approximate the shape of the Earth, making them incorrect options.

Explanation

The term "datums" refers to the various models or reference systems that are used to approximate the shape of the Earth. These datums are used in geodesy and cartography to accurately represent the Earth's surface. Spheres, coordinates, and ellipsoids are not used to approximate the shape of the Earth, making them incorrect options.

21. An ArcMap file that contains data frames, layouts, scripts, and sometimes charts is called a

Cartographic file

Map Document

Projection

Selection

Bk2_U1L1

Explanation

Bk2_U1L1

22. How would data that lists the addresses of all restaurants in your county appear in an ArcGIS attribute table?

Column

Menu

Record

Row

(Unit 2, Lesson 1)

Explanation

(Unit 2, Lesson 1)

23. What would be the best attribute-related query expression to use if you wanted to find all areas in the county with per capita income of at least $15,000?

([Aggreg_Inc] > 15000)

([PerCapInc] never> 15000)

([PerCapInc] > 15000)

([PerCapInc] not < 15000)

(Unit 2, Lesson 4)

Explanation

(Unit 2, Lesson 4)

24. What ArcGIS function allows you to navigate more quickly to data storage locations?

Add Data

Browse

Connect to folder

Menus

(Unit 2, Lesson 3 )

Explanation

(Unit 2, Lesson 3 )

25. Locations of interest that can be taken with a GPS unit are called

Waypoints

Markers

Routes

Bearings

Waypoints are locations of interest that can be taken with a GPS unit. They are specific coordinates or points on a map that can be saved and used for navigation purposes. By marking a waypoint, users can easily navigate back to that location or plan a route based on multiple waypoints. Waypoints are commonly used in outdoor activities such as hiking, boating, and geocaching, as well as in professional fields like surveying and mapping.

Explanation

Waypoints are locations of interest that can be taken with a GPS unit. They are specific coordinates or points on a map that can be saved and used for navigation purposes. By marking a waypoint, users can easily navigate back to that location or plan a route based on multiple waypoints. Waypoints are commonly used in outdoor activities such as hiking, boating, and geocaching, as well as in professional fields like surveying and mapping.

26. The ArcGIS program that allows you to view and analyze geographic data is called

ArcCatalog

ArcMap

ArcToolbox

ArcGeography

Bk2 U1L1

Explanation

Bk2 U1L1

27. Which of the following is an example of a Select by Attribute query?

Selecting all roads that intersect streams

Selecting all schools contained in a congressional district

Selecting all census tracts with a per capita income less than $15,000

Selecting all schools located within 1 mile of a railroad

Unit 2, Lesson 2)

Explanation

Unit 2, Lesson 2)

28. What would be the best attribute-related query expression to use if you wanted to find all elementary schools in Smith county?

(([County_Name] = Smith) and (([School_Type] = “Elementary”) not (“Middle School”) and not (“High School”))

(([ County_Name] = Smith) and (([School_Type] = “Elementary”))

(([County_Name] = Smith) or (([School_Type] = “Elementary”))

(([County_Name] = Smith) or (([School_Type] = “Elementary”) not (“Middle School”) and not (“High School”))

(Unit 2, Lesson 4)

Explanation

(Unit 2, Lesson 4)

29. Using degrees for distance measurement in GIS analysis is not recommended because

Degrees of longitude differ because they do not have constant distance between them as you move from equator to pole.

Degrees differ based on the temperature of a region.

Degrees differ based on the elevation of a region.

Degrees are not used for identifying locations for data generated since 1957.

(Unit 2, Lesson 5)

Explanation

(Unit 2, Lesson 5)

30. In creating overlays, a union differs from an intersect because

A union can only be performed using polygon features

An intersect can be performed on all data layers and a union cannot

A union contains overlapping and non-overlapping areas from each data set.

An intersect contains overlapping and non-overlapping areas from each data set.

A union differs from an intersect because a union combines the overlapping and non-overlapping areas from each data set, while an intersect only includes the overlapping areas. This means that a union will result in a larger combined area, including all the features from both data sets, while an intersect will only include the common features that overlap between the two data sets.

Explanation

A union differs from an intersect because a union combines the overlapping and non-overlapping areas from each data set, while an intersect only includes the overlapping areas. This means that a union will result in a larger combined area, including all the features from both data sets, while an intersect will only include the common features that overlap between the two data sets.

31. How would data that lists the name, address and phone number of one restaurant in your county appear in an ArcGIS attribute table?

Column

Field

Menu

Row

(Unit 2, Lesson 1)

Explanation

(Unit 2, Lesson 1)

32. A query performed using the Definition Query in Layer Properties differs from a Select by Attribute query because

Only the features meeting the query criteria will display in the map.

The features meeting the query criteria will display in a different color.

Only point feature data can be used in the query.

Only polygon feature data can be used in the query

A query performed using the Definition Query in Layer Properties differs from a Select by Attribute query because only the features meeting the query criteria will display in the map. This means that when using a Definition Query, only the features that meet the specified criteria will be shown on the map, while all other features will be hidden. This allows for a more focused and customized view of the data on the map based on specific query criteria.

Explanation

A query performed using the Definition Query in Layer Properties differs from a Select by Attribute query because only the features meeting the query criteria will display in the map. This means that when using a Definition Query, only the features that meet the specified criteria will be shown on the map, while all other features will be hidden. This allows for a more focused and customized view of the data on the map based on specific query criteria.

33. The ArcGIS program that allows you to preview and create new data files is called

ArcCatalog

ArcMap

ArcToolbox

ArcGeography

(Unit 1, Lesson 1)

Explanation

(Unit 1, Lesson 1)

34. The ArcGIS program that allows you to change data projections and convert data files from one type to another is called

ArcCatalog

ArcMap

ArcToolbox

ArcGeography

(Unit 2, Lesson 4)

Explanation

(Unit 2, Lesson 4)

35. Where can the coordinate system for a map display be specified in ArcMap?

Data Frame Properties

Effects

Layer Properties

Page Setup

(Unit 2, Lesson 1 )

Explanation

(Unit 2, Lesson 1 )

36. The process of aligning an image to another image or feature data layer is called

Georeferencing

Addressing

Blocking

Geocoding

(Unit 2, Lesson 5)

Explanation

(Unit 2, Lesson 5)

37. Data represented as points, lines, and polygons are of what type of data?

Continuous data

Feature data

Image data

Raster data

(Unit 1, Lesson 3 )

Explanation

(Unit 1, Lesson 3 )

38. Programs written in Visual Basic programming language that allow you to customize ArcView GIS are called

Extensions

Layouts

Scripts

Tables

Scripts in Visual Basic programming language allow users to customize ArcView GIS. Scripts are used to automate repetitive tasks, create new tools, and enhance the functionality of ArcView GIS. They provide a way to extend the capabilities of the software and tailor it to specific needs. With scripts, users can create custom workflows, automate data processing, and perform complex analysis.

Explanation

Scripts in Visual Basic programming language allow users to customize ArcView GIS. Scripts are used to automate repetitive tasks, create new tools, and enhance the functionality of ArcView GIS. They provide a way to extend the capabilities of the software and tailor it to specific needs. With scripts, users can create custom workflows, automate data processing, and perform complex analysis.

39. Data frame properties differ from layer properties because

Data frame properties can only be changed once in a project.

Data frame properties are changed only in ArcCatalog

Data frame properties are the only properties that determine how data is displayed in a map layout.

Unit 2 Lesson 1

Explanation

Unit 2 Lesson 1

40. Different map projections are used for different GIS projects because

Only UTM coordinate systems can be used for computer-aided geographic analysis.

The same map projection cannot be used for more than one project

Spherical coordinate systems are the best systems to use for GIS analysis

The map projection that is best for the study area should be used.

(Unit 2, Lesson 5)

Explanation

(Unit 2, Lesson 5)

41. What would be the best expression to use in Select By Location query to find where all railroad crossings were located in the county?

Railroads that are within a distance of 0 of streets

Railroads that are completely contained by streets

Streets that intersect railroads

Streets that are within a distance of 0 ft of railroads

(Unit 2, Lesson 2)

Explanation

(Unit 2, Lesson 2)

42. The process of reducing the amount of detail in a layer by removing boundaries of areas with the same attribute value is called

Clipping features

Dissolving features

Inputting features

Resulting features

Dissolving features is the process of reducing the amount of detail in a layer by removing boundaries of areas with the same attribute value. This means that areas with the same attribute value will be merged together, resulting in a simplified representation of the data. This can be useful when trying to generalize or simplify a dataset, especially when dealing with large amounts of data or when trying to create more generalized maps or visualizations.

Explanation

Dissolving features is the process of reducing the amount of detail in a layer by removing boundaries of areas with the same attribute value. This means that areas with the same attribute value will be merged together, resulting in a simplified representation of the data. This can be useful when trying to generalize or simplify a dataset, especially when dealing with large amounts of data or when trying to create more generalized maps or visualizations.

43. A shapefile differs from a geodatabase because

A shapefile can contain a single feature class and a geodatabase can contain multiple feature classes.

A shapefile can contain only point, line or polygon feature types but a geodatabase can use other geometric types.

A shapefile cannot be created in ArcCatalog but a geodatabase can.

A shapefile is the only data format that can be viewed in ArcCatalog.

(Unit 1, Lesson 3)

Explanation

(Unit 1, Lesson 3)

44. To create a new data layer from selected records in an existing data layer, what ArcMap option must you use?

Add data

Export data

Import data

Rectify data

(Unit 2, Lesson 4)

Explanation

(Unit 2, Lesson 4)

45. The display that is used to show the distribution of pixel values in a data layer is called a

Attribute table

Data Frame Properties

Histogram

Layer Properties

(Unit 1, Lesson 1 )does not use the word “histogram”

Explanation

(Unit 1, Lesson 1 )does not use the word “histogram”

46. The process of creating map features from a table of addresses is called

Addressing

Blocking

Geocoding

Georeferencing

(Unit 2, Lesson 3)

Explanation

(Unit 2, Lesson 3)

47. A component of an ArcGIS project that displays data frames, charts, reports and other graphic elements that may be printed is called a

Extension

Layout

Script

Table

(Unit 1, Lesson 2 )

Explanation

(Unit 1, Lesson 2 )

48. In creating overlays, a union differs from an intersect because

A union can only be performed using polygon features

An intersect can be performed on all data layers and a union cannot.

A union contains overlapping and non-overlapping areas from each data set.

An intersect contains overlapping and non-overlapping areas from each data set.

A union differs from an intersect because it combines both overlapping and non-overlapping areas from each data set. In other words, when performing a union, the resulting overlay will include all the features from both data sets, regardless of whether they overlap or not. This is in contrast to an intersect, which only includes the overlapping areas from each data set.

Explanation

A union differs from an intersect because it combines both overlapping and non-overlapping areas from each data set. In other words, when performing a union, the resulting overlay will include all the features from both data sets, regardless of whether they overlap or not. This is in contrast to an intersect, which only includes the overlapping areas from each data set.

49. What would be the best legend type to use on an ArcMap map layout to plot per capita income in various areas of a county?

Graduated color

Graduated symbol

Single symbol

Unique value

The best legend type to use on an ArcMap map layout to plot per capita income in various areas of a county would be Graduated color. This legend type allows for the representation of different income levels using a color gradient, making it easy to visually compare and understand the variations in per capita income across different areas.

Explanation

The best legend type to use on an ArcMap map layout to plot per capita income in various areas of a county would be Graduated color. This legend type allows for the representation of different income levels using a color gradient, making it easy to visually compare and understand the variations in per capita income across different areas.

50. Surfaces are better types of data layers to be used for continuous data than features because

Continuous data cannot be displayed as feature data

Because every point on the Earth has a specific temperature, elevation, rainfall, etc. associated with it.

Surface data is homogeneous

Feature data is heterogeneous.

(Unit 1, Lesson 1)

Explanation

(Unit 1, Lesson 1)

51. Using a GPS point log is important when collecting waypoints because

Objects may be moved and this could be one way of keeping track of the past positions

It will allow the user to provide a description of what is actually at that location

It will give your teacher a log of where you have been

It is a good exercise in descriptive analysis

Using a GPS point log is important when collecting waypoints because it will allow the user to provide a description of what is actually at that location. This means that the user can record important information about the specific place or object they are marking, providing context and details that may be useful later on. This can help in accurately documenting and understanding the locations visited or objects observed during data collection.

Explanation

Using a GPS point log is important when collecting waypoints because it will allow the user to provide a description of what is actually at that location. This means that the user can record important information about the specific place or object they are marking, providing context and details that may be useful later on. This can help in accurately documenting and understanding the locations visited or objects observed during data collection.

52. Which of the following is an example of a legend type that is best used to display a quantitative attribute?

Graduated color

Multiple attributes

Single symbol

Unique value

The correct answer is "Graduated color". Graduated color is a legend type that is best used to display a quantitative attribute. It uses a range of colors to represent different values of the attribute, with darker or lighter shades indicating higher or lower values respectively. This type of legend is effective in visually representing the varying levels or intensities of a quantitative attribute, making it easier for viewers to interpret and understand the data.

Explanation

The correct answer is "Graduated color". Graduated color is a legend type that is best used to display a quantitative attribute. It uses a range of colors to represent different values of the attribute, with darker or lighter shades indicating higher or lower values respectively. This type of legend is effective in visually representing the varying levels or intensities of a quantitative attribute, making it easier for viewers to interpret and understand the data.

53. The process that allows dynamic labels placed on a map display to be moved or edited is called

Annotation

Dynamic editing

Redraw

Refresh

(Unit 2, Lesson 2 )does not use the word “annotation”

Explanation

(Unit 2, Lesson 2 )does not use the word “annotation”

54. Where can the display units for a map display be specified in ArcMap?

Data Frame Properties

Effects

Layer Properties

Page Setup

(Unit 2, Lesson 1 )

Explanation

(Unit 2, Lesson 1 )

55. A layer data file differs from a shapefile because

A layer file is the only type of data that can be viewed in ArcMap

A layer file can be created in ArcCatalog but a shapefile cannot.

A layer file retains its symbology properties and a shapefile does not.

A shapefile is the only type of data that can be viewed in ArcMap

(Unit 1, Lesson 3)

Explanation

(Unit 1, Lesson 3)

56. When using data with differing coordinate systems, which coordinate system is used when ArcMap reprojects data "on-the-fly?"

Geographic

The projection of the last layer added to ArcMap

The projection of the first layer added to ArcMap

UTM

(Unit 2, Lesson 5)

Explanation

(Unit 2, Lesson 5)

57. The default classification method ArcMap uses to automatically group data values is

Natural Breaks

Quantile

Defined Interval

Manual

ArcMap uses the Natural Breaks classification method as the default method to automatically group data values. This method identifies natural groupings in the data by minimizing the variance within each group and maximizing the variance between groups. It is particularly useful for data that has distinct clusters or gaps. This method allows for the creation of meaningful and visually appealing maps by grouping similar values together.

Explanation

ArcMap uses the Natural Breaks classification method as the default method to automatically group data values. This method identifies natural groupings in the data by minimizing the variance within each group and maximizing the variance between groups. It is particularly useful for data that has distinct clusters or gaps. This method allows for the creation of meaningful and visually appealing maps by grouping similar values together.

58. Which of the following is an example of a Select by Location query?

Selecting all census tracts with a per capita income less than $15,000

Selecting all schools located inside the city limits

Selecting all high schools in a school district

Selecting all cities with populations greater than 100,000

(Unit 2, Lesson 2)

Explanation

(Unit 2, Lesson 2)

59. Where can the data source for a data file be specified in ArcMap?

Data Frame Properties

Effects

Layer Properties

Page Setup

(Unit 2, Lesson 1 )

Explanation

(Unit 2, Lesson 1 )

60. What ArcCatalog function allows you to find other data layers that have the same geographic extent?

Connect to folder

Create thumbnail

Identify

Search

(Unit 1, Lesson 3 )

Explanation

(Unit 1, Lesson 3 )

61. What must be created in ArcCatalog to perform geocoding?

Address table

Geocoding service

New shapefile

Reference table

(Unit 2, Lesson 3)

Explanation

(Unit 2, Lesson 3)

62. What would be the best legend type to use on an ArcMap map layout to plot all of the states in the U.S. (with a different color representing each state)?

Graduated color

Graduated symbol

Single symbol

Unique value

(Unit 2, Lesson 4)

Explanation

(Unit 2, Lesson 4)

63. What would be the best way to go to a specific area of interest within a layer in a map quickly?

Bookmark

Find

Fixed Zoom In

Zoom to Layer

(Unit 1, Lesson 1)

Explanation

(Unit 1, Lesson 1)

64. Which ArcGIS program must be used to permanently reproject a data layer?

ArcCatalog

ArcMap

ArcToolbox

Reprojection Extension

ArcToolbox must be used to permanently reproject a data layer in ArcGIS. ArcToolbox is a collection of tools and functions in ArcGIS that allows users to perform various geoprocessing tasks, including data transformation and projection. It provides a wide range of tools for data management, analysis, and conversion, making it the appropriate program to use for permanently reprojecting a data layer.

Explanation

ArcToolbox must be used to permanently reproject a data layer in ArcGIS. ArcToolbox is a collection of tools and functions in ArcGIS that allows users to perform various geoprocessing tasks, including data transformation and projection. It provides a wide range of tools for data management, analysis, and conversion, making it the appropriate program to use for permanently reprojecting a data layer.

65. What would be the best legend type to use on an ArcMap map layout to plot world cities with varying populations?

Graduated color

Graduated symbol

Single symbol

Unique value

The best legend type to use on an ArcMap map layout to plot world cities with varying populations would be Graduated symbol. This legend type allows for the representation of different population sizes using varying symbol sizes, making it easy to visually compare the population of different cities on the map.

Explanation

The best legend type to use on an ArcMap map layout to plot world cities with varying populations would be Graduated symbol. This legend type allows for the representation of different population sizes using varying symbol sizes, making it easy to visually compare the population of different cities on the map.

Intro To GIS Tools And Processes_book 2