topic Re: How to get intersecting points of MapImageLayer features, selected by Rectangle? in ArcGIS JavaScript Maps SDK Questions

How to get intersecting points of MapImageLayer features, selected by Rectangle?

ChristianBischof — Sun, 24 Jan 2021 13:17:21 GMT

Hi folks,

I have a MapImageLayer which sublayer symbolizes roads of a country on a map. I want to sketch a rectangle over these Roads and get the intersection points (including the routes themselves) back.

So basically what I have is the MapImageLayer, which features I can also query but the only thing I get back are obviously all routes - I need to query it based on the "rectangle selection" which is currentyl sketched in a GraphicsLayer using the SketchViewModel.

Thanks in advance for your help!

Re: How to get intersecting points of MapImageLayer features, selected by Rectangle?

Anonymous User — Tue, 26 Jan 2021 13:25:58 GMT

Have you looked at the geometry engines intersect method? Might be what you are looking for.

Re: How to get intersecting points of MapImageLayer features, selected by Rectangle?

JohnGrayson — Tue, 26 Jan 2021 16:09:51 GMT

Do you have a simple CodePen showing what you've tried so far? The simplest approach is to use the queryFeatures() method on the Sublayer. You might also consider converting the Extent to a Polyline to simplify the intersect operation.

Re: How to get intersecting points of MapImageLayer features, selected by Rectangle?

UndralBatsukh — Wed, 27 Jan 2021 16:57:35 GMT

Hi there,

This simple test app show how to query features of a sublayer that intersect a rectangle. You'd have to modify it so that that you are querying all sublayers you need to query. Hope this helps.

Re: How to get intersecting points of MapImageLayer features, selected by Rectangle?

JohnGrayson — Thu, 28 Jan 2021 16:12:25 GMT

...and here's a slight modification to above codepen that shows how to only get features that intersect the extent boundary:

https://codepen.io/john-grayson/pen/GRNKPjw