Designing Map Interfaces by Michael Gaigg

Author:Michael Gaigg [Gaigg, Michael]
Language: eng
Format: epub
Tags: User Interfaces, Cartography, Geographic Information Systems, Human-Computer Interaction, UI/UX
Publisher: Esri Press
Published: 2022-11-01T16:11:47+00:00

How

Show all the features without any geographic restrictions. Let users define a geography through interface components such as a drop-down list. Order the list of options alphabetically and consider adding a search field to reduce the options if the list is long. When the user selects an option from the list, all the features that do not fall within the selected geography will be removed.

The spatial filter usually filters features by an attribute of the feature set. Alternatively, the filter may run a server-side or client-side query. Client-side queries have the advantage that the data is already available in the browser and the filter can be applied immediately. Server-side queries often require an explicit button click to apply the filter query. Regardless of the filter mechanism, always provide an easy way to clear the filter.

For lesser-known geographies, help users by letting them browse a hierarchical set of geographies, such as selecting a state from a drop-down list to reveal a second drop-down list for selecting a county within that state. The following patterns describe alternative approaches on how to filter data spatially:

Browse geographies lists all the options for easy browsing instead of lengthy drop-down lists.

Feature selection describes how the map can be used to draw an arbitrary filter area.

Buffer defines a spatial filter by creating a buffer zone around a selected feature.

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