topic Re: How to add point to map/service that must intersect layer with JS API or REST API? in ArcGIS Web AppBuilder Questions

How to add point to map/service that must intersect layer with JS API or REST API?

GeoffreyWest — Wed, 16 Nov 2016 00:31:18 GMT

I would like to write a function which allows a user to enter coordinates a via a widget for a WebApplication Builder application. The user should be able to enter coordinates and the point appears on the map and posts to a feature service if the coordinates intersect with a line feature/map service. Is there a widget that already harnesses this functionality, if not, how can this be done?

Re: How to add point to map/service that must intersect layer with JS API or REST API?

RobertScheitlin__GISP — Fri, 18 Nov 2016 13:35:10 GMT

Geoffrey,

There is not a widget out there for this custom workflow, but it can definitely be created as a custom widget. The main issue will be the precision that will be needed to get a point yo intersect a line.

Re: How to add point to map/service that must intersect layer with JS API or REST API?

Drew — Fri, 18 Nov 2016 14:28:01 GMT

As Robert mentioned this is a custom widget,
Below is a general description of the task at hand that might get you moving forward.

Create a blank Web App Builder widget
Have 2 input boxes for the X and Y values to be entered and a button.
When the user clicks the button, convert the users input into a Point object and a new Graphic.
Add the graphic to a new GraphicsLayer - dont forget to symbolize and add the Graphicslayer to the map.
Using the Point geometry run an intersect against your line(s) and see if it comes back true
- The geometryEngine can help with the intersect:
If the intersect is true then take your point and add it to a feature layer using the 'applyEdits' function.

Other factors to consider is the spatial reference of the XY and error checking

Drew