MediaLayer hitTest not returning Source Pixel value (4.25 js-api-next)

LukeCalladine

Hey all,

I'm having a play with the new MediaLayer and ControlPointsGeoreference and I've run into the following issue - appreciate its on the next branch of the JSAPI.

Is there any way to identify the ImageElements source pixel value from a MediaLayer from a hitTest click on the MapView?

Cheers,

Luke

Sage_Wall

Your right Luke, we don't have complete documentation up for the next branch, but what I can do is add better descriptions of a couple methods you'll likely have interest in here and in the changelog.  Once we release 4.25 we'll have everything documented and there will be a new sample as well.

 

// toMap() - Converts the given sourcePoint to a mapPoint
const mapPoint = controlPointGeoreference.toMap({x: 100, y: 250})

// toSource() - Converts the given mapPoint to a sourcePoint.
// The sourcePoint represents a point in terms of pixels relative
// to the top-left corner of the element.
view.on("click", async (event) => {
    const hitTestResult = await view.hitTest(event);
    const mapPoint = hitTestResult.results[0].mapPoint;
    const sourcePoint = controlPointsGeoreference.toSource(mapPoint);
    console.log("mapPoint:", mapPoint, "sourcePoint", sourcePoint);
});