![]() ![]() For larger-scale maps, users expect detail and realism. They also expect interactive maps that support zooming at a minimum but also potentially support query, analysis, and customization. They expect current data and sometimes continuously updated data (e.g., maps that show monitoring sites). Users will likely also have certain expectations for web map content. ![]() Web maps can also be portals for downloading or uploading content. The map can be linked to databases that report attribute information, display images, play sounds when users click related map features, or perform analyses by accessing geoprocessing functionality. It is possible to show less on the map itself (e.g., labels or detailed features) and still convey information. Since the web environment is well suited for interaction, more information can be immediately shared using mouse-overs, ToolTips, information boxes, labels, and hyperlinks. The additive (top) and subtractive (bottom) color systems ![]() These characteristics challenge web mapmakers to design maps that possess high levels of graphic and information clarity. Users also expect what they are viewing to be of immediate and personal use to them. They do not focus long on content or tasks before becoming distracted, so not only should a web map display quickly, its functions should respond rapidly and its purpose should be immediately understood. Typically, web users have relatively short attention spans and high expectations. When designing a web map, as with any map you make, the first thing to ask is, "What is the purpose for this map?" The answer will disclose the map's audience and how it will be used by that audience. A web mapping application refers to both the script that is created to define the interface and the elements and functions provided through the interface. For mapmakers using Esri software, a web map is compiled in ArcGIS for Desktop's ArcMap, and the interface, map elements (e.g., legend, scale bar), query elements, and report elements are created using the ArcGIS viewers or ArcGIS APIs, available for JavaScript, Flex, and Silverlight. This article will help you take those differences into account and create more effective web maps.Ī web map is a map and related content presented in an online environment with an appropriate interface and optional functionality for queries and reports. Web maps have characteristics that make them different from print maps or other on-screen maps. Comparison of the web Mercator (left) and Winkel Tripel projections (right) ![]()
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