![]() Instead of thinking about population density in Indonesia, a map reader's attention may be captured by the ocean trench bordering Java and Sumatra or forest cover in Papua New Guinea.Ī simpler, more neutral background is a better choice for a thematic map. However, their variety of colors and textures also distract from the focus of your map. These detailed layers are useful for exploring your data in its geographic context. Your map currently uses the World Topographic Map and World Hillshade layers as the basemap. ![]() Next, you'll learn how to mix and match basemap layers to create a simple background that complements your thematic data, rather than distracting from it. But your map has at least one more layer that should not be left in its default state: the basemap. When you work on your own map projects, you will often switch back and forth between layers to ensure that all map symbols work together in a cohesive map design.Īt the start of this tutorial, your thematic map layers were drawn with default symbols, which you changed to better communicate the data. In this tutorial, you symbolized one layer at a time. You learned how to group and rename symbol classes and redesign template symbols for your own purposes. In the Symbology pane, for Normalization, choose Area (square km).To normalize this population data, you'll divide the population of each province by its area to calculate the population density. The point of normalization is to convert values to a standardized scale so that comparisons are meaningful. When mapping geographic areas with colors, it's important to normalize your data, usually by converting counts to rates or ratios. Instead of mapping population, it would be better to map population density. This map is misleading because it doesn't indicate well where most of the population lives. But one is many times larger than the other, so population density must be very different. Central Kalimantan (on the island of Kalimantan, or Borneo) and the Special Region of Yogyakarta (on the island of Java) appear to have similar populations. The symbology of this map still has a problem. Sometimes cut-off values are meaningful, for example, if governmental funding is available at different tiers. When are graduated colors more appropriate than unclassed colors? Sometimes a map is easier to understand if values are grouped into bins representing small, medium, or large values. If you're using a different version of ArcGIS Pro, you may encounter different functionality and results. This tutorial was last tested on November 14, 2023, using ArcGIS Pro 3.2. Along the way, you'll learn about common design decisions that will help you create effective symbology for your own thematic maps. You'll symbolize province polygons, city points, and road lines. In this tutorial, you'll build a simple, clear, and attractive map of population in Indonesia. The map designer is less concerned with making the map resemble the place and more concerned with presenting a clear communication of the data, its patterns, and the message they want to convey with it. The color, size, and shape of symbols are varied so the most important map features are the most obvious, and the quantitative and qualitative relationships between the data are clear. As a result, thematic symbology is more abstract. ![]() While a topographic or reference map mostly depicts things that are visible on the ground, such as lakes, roads, or forests, a thematic map often visualizes phenomena that are not, such as election results, habitat ranges, and agricultural suitability.
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