An important element of many geospatial applications is the ability to search for features that meet certain criteria. The nature of those criteria might be spatial (e.g., land parcels adjacent to a particular street) or non-spatial (e.g., land parcels owned by a particular person).
In Lesson 6, we’ll see how Query objects can be used in an Esri JS API app to answer both spatial and non-spatial questions. Before that, however, we’ll look at the API’s Search widget, which can be used to find values in a layer’s attribute table or to find places when configured to work with a locator service.
At the successful completion of this lesson, you should be able to:
- configure the Search widget using sources (layers and/or locators).
- understand the concept of a promise (in a JS context).
- set a layer's definition expression.
- define and execute queries.
If you have any questions now or at any point during this week, please feel free to post them to the Lesson 6 Discussion Forum. (That forum can be accessed at any time by clicking on the Discussions tab within Canvas.)