Can I zoom into a polygon with buffer?

LindaM — Tue, 21 Feb 2017 16:41:50 GMT

I need to let the map zoom into a free-draw polygon’s buffer; the buffer can be 10 – 100 miles defined by the users, the buffer value is defined as BufferDistance.

I know for a circle with buffer, it can be defined such as

var circleBuffer = new Circle(centerPoint, {

"radius": this.circle.radiusValue

});

And then the map extent is set as:

this.map.setExtent(circleBuffer.getExtent());

I test this circle statement, it can zoom into the circle buffer very well.

My question is: what if I want to zoom into a free-draw polygon with buffer? How do I get the extent of this polygon with buffer (not just polygon itself)? In esri/geometry domain, a polygon constructor does not include any optional parameter like radius/buffer. I tried the following:

this.map.setExtent(polygon.geometry.getExtent());

It can only zoom into the polygon itself, not the polygon buffer. Thanks!

Re: Can I zoom into a polygon with buffer?

RobertScheitlin__GISP — Tue, 21 Feb 2017 16:53:14 GMT

Linda,

You have to use the GeometryService buffer method first and use the returned promise to set the maps extent.

GeometryService | API Reference | ArcGIS API for JavaScript 3.19 | buffer

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Can I zoom into a polygon with buffer?

Re: Can I zoom into a polygon with buffer?