Getting maximum and minimum latitude and longitude of view

Question

How can I retrieve the maximum and minimum latitude and longitude of the current view using the arcGIS javascript API (4.x)?

I can get the center lat and lon by using:

MapView.center.latitude and MapView.center.longitude.

I can also get the height and width in pixels using:

MapView.height and MapView.width.

However, I can't convert the pixel size to a lat/lon as the MapView.resolution property is 0. The MapView.extent is also null.

I am asking as I would like to query a database and only get the entries with a latitude and longitude within the view to save having to draw every point.

Answer 1

You can get the Extent of the MapView, which contains its xmin, xmax, ymin, and ymax values.

To get the extent upon loading the MapView use:

view.on("layerview-create", function() { console.log(view.extent.xmin); console.log(view.extent.xmax); console.log(view.extent.ymin); console.log(view.extent.ymax); });