Creating Thematic Area Maps With ArcGIS Pro (2023)

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A thematic map "is used to display the spatial patternof a theme or attribute" (Slocum et al. 2009, 1). This is distinctfrom a general-reference map which provides a general overviewof information, often representing multiple variables.

A commonly-seen thematic map in the USA is red-state / blue-state choroplethmap showing the predominance of political parties in presidential elections.

Creating Thematic Area Maps With ArcGIS Pro (1)

This tutorial covers the basic steps for creating maps of areas in ArcGIS Pro.

  1. Start the Map
  2. Acquire the Data
  3. Subset the Data (Optional)
  4. Symbolize the Features
  5. Label the Features (Optional)
  6. Present the Map
  7. Save Your Project

Start the Map

Start a New Project

To create a new map in a new project:

  1. Log in to ArcGIS Pro.
  2. When presented with options on the start screen, start your new project with a Map.
  3. Give the project a meaningful title so you can keep track of what is in differentprojects.

Add a Map to an Existing Project

If you have an existing project you can add anadditional map to the project by going to the Inserttab and selecting Map.

You may want to rename your maps so it isclear what map is what.

Duplicate an Existing Map

If you want to make a map similar to a map youalready have in your project, or just want to make a revisedversion of an existing map without destroying the old one:

  1. View the Catalog Pane.
  2. Copy the existing map.
  3. Paste to create the new map.
  4. Rename the maps with meaningful names to avoid getting them confused.
  5. Modify the new map as desired.

Acquire the Data

Feature Services

Data sources that wish to make their data available to the public oftenmake it available as feature services. One major provider of feature servicesin the ESRI ecosystem is ArcGIS Online, which is tightly integrated intoArcGIS Pro. Some services in ArcGIS Online are provided by ESRI, whileothers are provides by organizations or individuals that use ArcGIS Online to disseminatetheir data privately or to the general public.

The examples in this tutorial use electoral data from the 2012 and 2016 US presidential election. The data is provided as the Minn 2016 Electoral States feature service from the University of IllinoisArcGIS Online organization.

This data was originally sourced from the Associated Press via Politico andrepresents election-night returns that do not exactly reflect official finalvote totals.

Shapefiles

The ESRI shapefile is a file format developed by ESRI in the late 1990s.While the format has many limitations and is obsolete, it is a well-establishedformat that works with a wide variety of software, so it is still commonly usedto share geospatial data.

(Video) Making a World Thematic Map in ArcGIS Pro

The term shapefile is a misnomer since a shapefile is actually acollection of at least three (and usually more) separate interrelated filesthat store the locational data, the characteristics associated with thoselocations, and other information about the data. Some common files associatedwith a shapefile include (listed by the file extension):

  • .shp: Contains the feature geometry (points, lines, polygons)
  • .shx: An index file that indicates where specific features are in the .shp file
  • .dbf: A dBase IV database file of attributes associated with each of the shapes in the .shp file
  • .prj: The coordinate system and projection used by the feature geometry (optional)
  • .cpg: The character encoding used by the attributes (optional)
  • .qpj: The coordinate system and projection in a format used by QGIS (optional)

For convenience, all these files are usually compressed into a single .ziparchive file for distribution on websites and servers.

This example uses a shapefile of ward boundaries in Chicago from the city'sopen data portal.

  1. Download the shapefile .zip archive from the website.
  2. In Windows Explorer, Extract the contents of the .zip archive file (0:40).
  3. Add Data and add the shapefile to the map (0:53).
  4. Change the projection to an appropriate projection if the shapefileseems to have come in as unprojected lat/long. WGS 1984 Web Mercatoris a safe choice unless you have a specific need for another projection (1:12).
  5. Right click on the new shapefile layer and selectData -> Export Features. This will start the Feature Class to Feature Classtool. This step is needed to copy the shapefile data into the projectgeodatabase so it will be saved when you package your project (1:20).
  6. For Output Feature Class provide a short but descriptive namewith no punctuation or spaces.
  7. Run the to save the shapefile data. This should add thedata as a new layer to your map.
  8. Delete the old shapefile layer (2:15).

Subset the Data (Optional)

There may be situations where you only need to display only some ofthe features in a layer. For those situations you can use a definition queryto select a subset of points based on criteria you specify.

Subset Based On A Single Field Value

If you want to only work with features that have a specific value fora single field, you can perform a definition with a single clause.

For example, this shows features from the Minn 2012-2016 Electoral Countiesfor only counties in Illinois:

  1. Right click on the layer you want to subset and click Properties and Definition Query.
  2. Add a New definition query.
  3. Add the conditions you want to define what features will be displayed. For this example,we choose the features where the ST state abbreviation field is equal to the value IL.
  4. Apply the query and click OK to finish.

Subset Based On a Ranges of Values

Queries can also be configured to subset ranges of values.

For example this example we show the counties in the Minn 2014-2018 ACS Countieslayer that are in Illinois. Unlike the electoral county layer above, this layer doesnot have a state field for selection. However, it does have FIPS (Federal Information Processing System)codes for the counties.

County FIPS codes are five digits, with the first two digits indicatingthe state and the last three digits indicating the county. For illinois the FIPS state code is 17, so we can perform a definition query where the FIPS field is greater than or equal to 17000 and less than or equal to 17999.

Symbolize the Features

The choice of how to symbolize the data is based on the characteristics of the data as well as the particular storythat you want to tell with your map.

The following subsections describe how to use a variety of differentsymbologies for different types of variables.

Categorical Choropleth

A choropleth is a type of map where areas are colored based on a singlevariable that describes some characteristic of those areas. Choroplethscan be used to visualize both categorical and quantitative variables.

(Video) Making A Map in ArcGIS Pro

The following video shows how to create a choropleth using a categoricalvariable.

  1. Modify the symbology for Unique Values based on the categoricalvariable you want to map. For this example we use the
  2. Choose colors for the categories. In this case we use the standardhighly-saturated red / blue palette common for maps of this type inthe media since 2000.
  3. You might consider different base maps, or perhaps no base mapat all.

Single-Color Quantitative Choropleths

Choropleths can also be used to visualize quantitative variables.When displaying a single variable, it is common to use a sequential color schemewith a range of lightness or saturation of a single hue that clearlyconveys high versus low.

This example uses the percentage of the Democratic vote in the 2012 election.In contrast to the stark, divisively categorical red-state / blue-state maps,this type of map shows that there are Democratic voters in all 50 states.

While this map is not as effective for communicating electionresults as the red-state / blue-state map (where there is indeed only one winner),this map is more effective at communicating the complexitiesof the US electorate.

  1. Right click the layer to modify the Symbology and select the variable you are going to map.
  2. Choose an appropriate classification method. The default of Natural Breaks (Jenks) is usually a safe choice.
  3. Choose a Color Scheme for the categories.
  4. Consider other base map options.

Two-Color Quantitative Choropleths

There are situations where the purpose of the map is to showdivergence above or below a central value. In such cases, theuse of two separate colors for high and low values in a divergingcolor scheme is effective.

An example of this is US election data, where most voters choose betweentwo candidates from two opposing parties. Using the percentage of the Democratic vote bystate, red for low values represents more people voting for Republicancandidates, while blue for high values represents more people votingfor Democratic candidates. The unsaturated grey in the middleindicates a balance.

Like the single-color map, this map offers a nuanced view of theelectoral landscape. However, the two-color map also pointsout balanced "swing" areas where efforts at politicalpersuasion can be effective for winning elections.

  1. Right click the layer to modify the Symbology and select the variable you are going to map.
  2. Choose an appropriate classification method. The default of Natural Breaks (Jenks) is usually a safe choice.
  3. Create a custom Color Scheme with two colors at the extremesand grey in the middle.

Graduated Symbol Maps

One approach for mapping quantitative values for irregularly sized areas(like states) is to use a graduated symbol map rather than a choropleth. Acommon example of this is the "bubble" map that uses differentlysized circles based on the variable being mapped. Although circles are mostcommon, other types of icons can be used for aesthetic variety.

Graduated symbol maps are also more appropriate than choropleths whenmapping counts rather than amounts (rates). Counts are variables that indicate size,such as the size of the population. With choropleth maps our eyes see the landarea as the size, and when the size indicated by the variable is not the sameas the sizes of the areas, we get an incorrect impression of where the largerand smaller values are located.

This example is a bubble map of the count of Republican voters in the 2012 electionby state. Unlike the red-state / blue-state choropleth, this shows that thelarge, sparsely-populated states are actually a less significant source of Republicanvotes than more densely-populated states.

Dot Density Maps

Another approach for mapping counts is the dot density map,where individual dots represent a certain portion of the overall count.

In this example, this allows us to map the counts of both Republican and Democraticvotes simultaneously.

(Video) Exercise 2:2: Basic Thematic Map-Making with GIS Software (Part 1 of 3) (ArcGIS Pro Walkthrough)

The disadvantage with a dot density map is that dots imply specific locations.Because the dots are distributed randomly across the area, this map doesnot accurately convey the exact spatial distribution of the voters.This can be remedied by using data for smaller areas (like counties),although data for smaller areas can sometimes be more difficult toacquire and less accurate for sparsely-populated areas where peopleare difficult to poll.

Cartograms

Another solution to the irregular area problem is to create a mapwhere the colored polygons are resized and reshaped based on population. Thiscreates significant geographic distortion and is less of a map thana map-like graphic.

This example uses polygons for a continuous cartogram of US statessized by population in the Minn 2020 Cartogram State Continuouslayer in ArcGIS Online. This and other cartograms are availablehere.

  1. Add Data the cartogram layer.
  2. Turn off the base map since a cartogram distorts geography.
  3. Join the two layers so the electoral data can be displayedin the cartogram polygons.
  4. Adjust the Symbology to use the display variable.

Label the Features

If the geographic areas being depicted should be fairly obviousto most readers, labeling the features can be a distraction. However,you have a limited number of features and you suspect some audiencemembers may not be familiar with the names of the areas depicted bythe features, you may want to add labels.

Automatic Labels

  1. Right click on the layer in the Contents paneand click to turn on Label.
  2. If you need to change the attribute used for the labels,right click on the layer in the Contents pane,select Labeling Properties..., delete the existingExpression, and double click the attribute youwant in the Fields box.
  3. Adding a Halo around the labels can help make them more legible over the base map.

Annotation Layer

One challenge with labels is dealing with situations wherelabels for features that are close together overlap. ArcGIS Protries to move the labels around so they all fit, but thealgorithm sometimes doesn't know enough about the datato make appropriate choices. In those cases, you need to createan annotation layer.

  1. Turn on labels and adjust the properties for how you want the labels to look.
  2. Right click on the layer and select Convert Labels To Annotations.
  3. For the Output Database use the project database, which willprobably be your only option.
  4. Run the tool.
  5. On the Edit tab, click Modify.
  6. In the modification options, select Annotation.
  7. Move the labels where you want them.
  8. Right-click to add leader lines if needed.

Present the Map

Once you have your map set up, you need to create a layout thatarranges the mapped area with associated mapping elements that conveyinformation needed to fully interpret the map.

Standalone Print Layout

If you want to print your map to paper or include it in a presentationin a manner where the map stands on its own with no additional content, you need a standalone layout that includes descriptive map elements.

Procedures forcreating standalone layouts are described here.

Map elements on a standalone layout

Figure Layout

If you wish to include your map as a figure in a report or other kindof document that provides context for the map, a figure layout with a minimal set of map elements will be less cluttered and use document space more efficiently.

Procedures forcreating figure layouts are described here.

Figure layout

Save the Project

Save A Project Package

When you are done with a project, you should save it as a project package on ArcGIS Online:

  1. This package willsave all of your maps, layouts, and local data togetherso that you can reopen the package later on any computerif you need to modify or recreate any maps.
  2. You can share the package in case you want someoneelse to be able to use the materials you created in the project.
  3. Saving this to ArcGIS online will protect you from losing your data ifsomething happens to your normal work computer.

Saving Failure

Project packaging will commonly fail with cryptic errors related to history.A typical error is error 00246 "Geoprocessing history items with errors cannot be included in this package."

(Video) THEMATIC MAPPING IN ARCGIS SOFTWARE (2020)

Project packages contain a list of tool operations performed in thepast so you can audit or recreate your work if needed. If any of those operations failed,or if the data sources have been modified or deleted, the history itemsare invalid and ArcGIS Pro will refuse to save the project package.

You can fix this by going into Analysis -> History and deletinghistory items (especially ones with red failure marks beside them),then trying the save again.

Reopen a Project Package

Lying With Maps

Mark Monmonier's (1991) book How to Lie with Maps details a number ofways that cartographic choices are also choices about what story a map tells.Both the comparative ease of map making facilitated by software like ArcGISOnline and ArcGIS Pro, in tandem with the subtle complexity of standardcartographic techniques, makes it fairly easy to intentionally orunintentionally to tell stories with maps that may not be justified by theunderlying data.

The Uneven Density Problem

Because we visually associate smaller and larger sizes with lower and higher values,creating choropleths of areas with widely differing levels ofpopulation density can create a mistaken interpretation of the variable being mapped.

The classic example of this is the red-state / blue-state map.Partisan choropleths can create a mistaken impression of Republican dominance since the land area ofthe US is dominated by sparsely-populated rural areas that lean Republican,while much of the the population lives in smaller, densely-populated urbanareas that lean Democratic but appear less dominant in a choropleth.

As described above, the uneven density problembe mitigated with bubble maps, dot-density maps, or cartograms.

Creating Thematic Area Maps With ArcGIS Pro (4)

The Modifiable Areal Unit Problem

The choice of different types of areas, such as counties vs. states, canalter the results of your analysis of the exact same phenomenon on the ground.For example, the impression given by a red-state / blue-state map isvery different than one based on counties or congressional districts.Smaller areas expose fine-grained differences better than than larger areas,but make it harder to see broad patterns.

Creating Thematic Area Maps With ArcGIS Pro (5)

Unusual Colors

Nonstandard color choices can create a reversed impressionof what the data actually represents. For example, creating ared-state / blue-state map where red is used for Democrats andblue is used for Republicans would be misleading in contemporary America.

Creating Thematic Area Maps With ArcGIS Pro (6)

Ill-Fitting Categorization Schemes

Likewise, the use of categorization schemes or thresholds that do notfit the distribution of the values in the data can over- or underemphasizethe contrasts between areas.

Creating Thematic Area Maps With ArcGIS Pro (7)

The Classification Problem

In some cases, using categories rather than continuous color schemes cancreate clear distinctions when the situation is actually more nuanced. Again,the red-state / blue-state map implies that everyone in a red state is aRepublican and vice versa, falling into theecological fallacy.While such a map is reflective of the binary nature of the electoral college,if you are trying to actually map the political landscape, mappingcontinuous values emphasizes the purpleness of US society.

Creating Thematic Area Maps With ArcGIS Pro (8)

Counts vs. Rates

For data like health conditions, mapping counts as choroplethscan make the situation in dense, populous areas seem more seriousthan it may actually be. Normalizing counts into rates, or using graduated symbol or dot-density maps can address this issue.

Creating Thematic Area Maps With ArcGIS Pro (9)

Is A Map The Appropriate Visualization?

You should ask if reducing an issue to Cartesian"where" is actually a meaningful representation of the situation.While proximity is still important, advances in communication andtransportation mean that distantly separated groups andindividuals can have closer social connections than peoplewho are physically closer.

(Video) ArcGIS Pro Creating a thematic map by joining values from Excel table

For example, a map of election results by county will showthe rural/urban divide, with rural areas leaning toward the GOPand urban areas leaning toward the Democratic Party. However, thisrequires some understanding of the urban geography of the USAand is inexact. A box-and-whisker plot showing the % GOP votebased on level of urbanization (1 = highest, 6 = lowest) showsmuch more clearly the dominance of Democrats in urban counties (1)and the GOP in rural counties (6).

The following video shows how to make such a chart.

FAQs

What are the four 4 types of thematic maps? ›

Types of Thematic Maps. There are several different types of thematic maps. These types include isoline maps, cartogram maps, choropleth maps, graduated symbol maps, heat maps, dot-density maps, and flow-line definition maps.

What is used to create thematic maps? ›

Normally, thematic maps use coastlines, city locations, and political boundaries as their basis. The map's theme is then layered onto this base map via different mapping programs and technologies such as geographic information systems (GIS).

What is the best use for a thematic map? ›

A choropleth map is a thematic map where geographic regions are colored, shaded, or patterned in relation to a value. This type of map is particularly useful when visualizing a variable and how it changes across defined regions or geopolitical areas.

What is the difference between maps and thematic maps? ›

A thematic map focuses on the spatial variability of a specific distribution or theme (such as population density or average annual income), whereas a reference map focuses on the location and names of features.

What are three examples of thematic maps? ›

Weather, population density and geology maps are examples of thematic maps.

What is the most common type of thematic map? ›

Choropleth maps are perhaps the most frequently used thematic maps for portraying statistical data, and therefore benefit from their familiarity across general audiences. A proportional symbol map is a thematic map that scales the size of a point symbol proportional to the represented value.

Why thematic maps is widely used in GIS? ›

The primary purpose of a thematic map is to visually portray a non-visual phenomenon, usually the attributes of geographic features (e.g., the median income of a county). A good thematic map clearly shows geographic patterns that mirror patterns in the real-world phenomenon.

What is the role of GIS in thematic mapping? ›

Researchers can use their own existing data sets within the GIS software to create thematic maps. The software allows you to present visual representations of statistical analyses of data in the form of a thematic map.

What are 3 features of a thematic map? ›

Thematic maps are single-topic maps that focus on specific themes or phenomena, such as population density, rainfall and precipitation levels, vegetation distribution, and poverty.

Is topographic map a thematic map? ›

Other authors define topographic maps by contrasting them with another type of map; they are distinguished from smaller-scale "chorographic maps" that cover large regions, "planimetric maps" that do not show elevations, and "thematic maps" that focus on specific topics.

What is the difference between a choropleth map and a dot map? ›

The choropleth map seen below of San Bernardino county population density uses random dots in this manner. Dot density maps, on the other hand, show the geographic density distribution of a phenomenon by placing dots representing a certain quantity of the phenomenon where they are most likely to occur.

What is the difference between a heat map and choropleth map? ›

The key difference between choropleth maps and heat maps is the shape of colored areas. In choropleths, shapes are defined by standard geographical boundaries, not by the data itself. A true geographic heatmap is an isopleth map (has data drawn shapes) that depict hotspots on a map to present concentrations of values.

What are disadvantages of a thematic map? ›

Does not present exact values. Provide general information about spatial patterns. It can be difficult to distinguish between two distinct shades. Variation in maps are hidden.

What are the 7 types of maps? ›

Some of the different types of maps are:
  • Physical Maps.
  • Topographic Maps.
  • Political Maps.
  • Weather Maps.
  • Economic Maps.
  • Resource Maps.
  • Population Maps.
  • World Maps.
6 Oct 2021

Which of the following would not be considered a thematic map? ›

Answer: World map is NOT an EXAMPLE of thematic maps.

What are the 5 themes of a map? ›

Geographers study the processes that cause changes like these. To help you understand how geographers think about the world, consider geography's five themes—location, place, region, movement, and human-environment interaction.

Which symbols are used in thematic map? ›

Common thematic mapping techniques using point symbols are dot maps and proportional symbol maps. On a dot map one dot represents a unit of some phenomena, and dots are placed at locations where the phenomenon is likely to occur (Slocum et al., 2005).

What does thematic mean in GIS? ›

Geographic Information Systems technology allows researchers and other users to compile layers of information into 'themes'. Thematic data layers are information data sets that have a common feature or attribute placed in the same layer of spatial data.

What is the difference between thematic and general purpose maps? ›

The emphasis in general purpose maps is on location. Wall maps, most maps found in atlases, and road maps are all in this category. Thematic maps, also referred to as special-purpose maps, illustrate the geographical distribution of a particular theme or phenomenon.

Is GIS mapping qualitative or quantitative? ›

These remotely sensed data are commonly known as quantitative data because they represent the actual quantity of land surface characteristics in each pixel. Among them, land use/cover data is frequently used in GIS analysis and spatial modelling.

What is the difference between topographic and thematic maps? ›

Answer: Topographic maps are general purpose which shows the visible features of the landscape such as relief, water bodies and roads. For example base, relief and city maps. Thematic maps are special purpose where the emphasis is placed on a particular element.

Are thematic maps qualitative? ›

The two principal types of thematic maps can be categorized as qualitative and quantitative.

What are the 6 types of maps? ›

Types of Maps
  • Political Map. A political map shows the state and national boundaries of a place. ...
  • Physical Map. A physical map is one which shows the physical features of a place or country, like rivers, mountains, forests and lakes. ...
  • Topographic Map. ...
  • Climatic Map. ...
  • Economic or Resource Map. ...
  • Road Map. ...
  • Scale of a Map. ...
  • Symbols.

Can you make 3D maps in ArcGIS? ›

3D is an integral part of ArcGIS Pro. Any 2D map can be converted to a 3D scene for data visualization, exploration, or analysis.

How do you Create an express map? ›

Build an express map and add features to it
  1. Step 1: Start an express map. ...
  2. Step 2: Add some points. ...
  3. Step 3: Fill out pop-up attributes. ...
  4. Step 4: Customize a point's symbolization. ...
  5. Step 5: Add some numbered points. ...
  6. Step 6: Draw some lines. ...
  7. Step 7: Clean up your lines. ...
  8. Step 8: Create some areas (click-and-place and freehand)

How does a bivariate map work? ›

A bivariate map portrays two variables, which represent two different phenomena simultaneously on a map. Bivariate maps enable users to visualize the spatial relationship between two variables, such as the relationship between population density and crime density, or between rainfall volume and forest density.

What are the disadvantages of using a choropleth map? ›

Although choropleths give a good visual impression of change over space there are certain disadvantages to using them: They give a false impression of abrupt change at the boundaries of shaded units. Choropleths are often not suitable for showing total values.

What are choropleth maps best for? ›

When to use choropleth maps. Choropleth maps are great to show a clear regional pattern in the data, or for local data. Regional patterns could be an unusually high unemployment rate in neighboring counties or the contrast between cities and rural areas.

What type of data is best visualized with a heat map? ›

Because of their reliance on color to communicate values, Heat Maps are perhaps most commonly used to display a more generalized view of numeric values. This is especially true when dealing with large volumes of data, as colors are easier to distinguish and make sense of than raw numbers.

Are choropleth maps quantitative or qualitative? ›

2.1 Choropleth mapping. Choropleth maps are among the most prevalent types of thematic maps. Choropleth maps represent quantitative data that is aggregated to areas (often called “enumeration units”).

What is a choropleth map in Arcgis? ›

A choropleth map (from Greek χῶρος ("area/region") + πλῆθος ("multitude")) is a thematic map in which areas are shaded or patterned proportionally to the value of a particular variable measured for each area. Most often the variable is quantitative, with a color associated with an attribute value.

What is the weakness of thematic analysis? ›

While thematic analysis is flexible, this flexibility can lead to inconsistency and a lack of coherence when developing themes derived from the research data (Holloway & Todres, 2003).

Do thematic maps tell a story? ›

Thematic maps are maps that tell a story about a place. Thematic maps display the same geographical or political data shown on general maps as a base layer but then map some physical, economic, or cultural phenomenon or top of that base layer.

What are the pros and cons of thematic analysis? ›

The advantage of Thematic Analysis is that this approach is unsupervised, meaning that you don't need to set up these categories in advance, don't need to train the algorithm, and therefore can easily capture the unknown unknowns. The disadvantage of this approach is that it is phrase-based.

What is a thematic map Class 4? ›

- Maps showing specific information are called thematic maps. - Different themes like road maps, rainfall maps, forest distribution maps, industry maps, etc are examples of thematic maps. - All the naturally occurring resources can be pointed by making thematic maps.

What is a thematic map Grade 4? ›

A thematic map is a type of map that portrays the. geographic pattern of a particular subject matter. (theme) in a geographic area.

How many types of Class 4 maps are there? ›

8 Different Types of Maps.

What are the 4 general classes of map projections? ›

What Are The 4 Main Types Of Map projections
  • Azimuthal projection.
  • Conic projection.
  • Cylindrical projection.
  • Conventional projection or Mathematical projection.

Is a topographic map a thematic map? ›

Other authors define topographic maps by contrasting them with another type of map; they are distinguished from smaller-scale "chorographic maps" that cover large regions, "planimetric maps" that do not show elevations, and "thematic maps" that focus on specific topics.

What is not considered a thematic map? ›

A physical map is different from a thematic map.

What is a qualitative thematic map? ›

Qualitative thematic maps: These maps show the locations and spatial distributions of specific geographic features. Examples are planning maps, geologic maps, soils maps, transportation network maps, distribution of flora and fauna species, and so on.

What are the 7 different types of maps? ›

Some of the different types of maps are:
  • Physical Maps.
  • Topographic Maps.
  • Political Maps.
  • Weather Maps.
  • Economic Maps.
  • Resource Maps.
  • Population Maps.
  • World Maps.
6 Oct 2021

What is thematic map graphic organizer? ›

Types of Graphic Organizers

A Descriptive or Thematic Map works well for mapping generic information, but particularly well for mapping hierarchical relationships. When information contains cause and effect problems and solutions, a Problem and Solution Map can be useful for organizing.

What is the importance of thematic maps? ›

The most common purpose of a thematic map is to portray the geographic distribution of one or more phenomena.

What are the 3 methods of map classification? ›

Maps are generally classified into one of three categories: (1) general purpose, (2) thematic, and (3) cartometric maps.

Which map projection is the most accurate? ›

AuthaGraph. The AuthaGraphy projection was created by Japanese architect Hajime Narukawa in 1999. It is considered the most accurate projection in the mapping world for its way of showing relative areas of landmasses and oceans with very little distortion of shapes.

Which projection is most widely used? ›

The most popular projection is the Mercator projection. The Mercator projection was created in 1569 by Gerardus Mercator for navigational purposes and became popular because it shows relative sizes accurately and is useful for navigation.

What is the most common style of map projection? ›

One of the most famous map projections is the Mercator, created by a Flemish cartographer and geographer, Geradus Mercator in 1569. It became the standard map projection for nautical purposes because of its ability to represent lines of constant true direction.

Videos

1. How to create thematic (choropleth) maps in ArcGIS, Part I
(Chris Goranson)
2. Arc GIS Thematic Map Tutorial
(Victoria Stromberg)
3. ArcGIS Pro - Quick Guide 05: Making Bivariate & Multivariate Maps
(Easy Gisy)
4. Exercise 2:2: Basic Thematic Map-Making with GIS Software (Part 2 of 3) (ArcGIS Pro Walkthrough)
(GIScience)
5. Creating a map legend in ArcGIS Pro
(CWU Geography)
6. Visualize Temporal Data in ArcGIS Pro
(ArcGIS)
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