topic Re: How do I create bookmarks (in the javascript code) using point and scale (rather than extent)? in ArcGIS JavaScript Maps SDK Questions

How do I create bookmarks (in the javascript code) using point and scale (rather than extent)?

WWUMap — Sat, 11 Dec 2021 17:49:14 GMT

Hi,

I'm using the Bookmarks widget, preloading bookmarks in the JavaScript code.
It works fine using type: extent:

new Bookmark({
name: "Test1",
viewpoint: {
targetGeometry: {
type: "extent",
xmin: -122.486,
ymin: 48.738,
xmax: -122.484,
ymax: 48.739
} } }),

But the scale isn't working for type: point:

new Bookmark({
name: "Test2",
viewpoint: {
targetGeometry: {
type: "point",
longitude: -122.488,
latitude: 48.73,
scale: ???
} } }),

How do I specify / use the scale parameter?

thanks,

~stefan (javascript beginner)

Re: How do I create bookmarks (in the javascript code) using point and scale (rather than extent)?

LaurenBoyd — Tue, 14 Dec 2021 01:41:18 GMT

Hi Stefan,

The scale property needs to be set on the Viewpoint, not on the target geometry. See the example below:

const bookmark = new Bookmark({ name: "Test", viewpoint: { scale: 1600, targetGeometry: { type: "point", longitude: -122.488, latitude: 48.73 } } });

The following sample shows this same code in action on lines 55-66: https://codepen.io/laurenb14/pen/JjrEYmO?editors=1000

Hope that helps!

-Lauren

Re: How do I create bookmarks (in the javascript code) using point and scale (rather than extent)?

WWUMap — Tue, 21 Dec 2021 19:35:36 GMT

Thanks LaurenBoyd - exactly what I was looking for!