How to convert an array of (X,Y) point to (Lat,Long)

MuralidharMoka — Sun, 12 Dec 2021 06:28:21 GMT

I have an array of projected (X,Y) points, which I am trying to convert to array of (lat,long).

I wrote the following method which will take a single (X, Y ) and give me ( Lat, Long). This works.

But I do not know how to use this to process my (X,Y) array. This should be simple, but could not get it.


function getLatLong(X,Y){

        return  (new Promise(function (resolve, reject) {
            require(["esri/tasks/GeometryService",
                    "esri/geometry/Point",
                    "esri/tasks/ProjectParameters",
                    "esri/SpatialReference"],
                function (GeometryService, Point, ProjectParameters, SpatialReference) {
                    var XCoord = parseInt(X, 10);
                    var YCoord = parseInt(Y, 10);

                    var inSR = new SpatialReference({wkid: 2274});
                    var outSR = new SpatialReference({wkid: 4326});

                    var gsvc = new GeometryService("https://mapviewtest.memphistn.gov/arcgis/rest/services/Utilities/Geometry/GeometryServer");
                    var inputpoint = new Point(XCoord, YCoord, inSR);
                    var prjParams = new ProjectParameters();
                    prjParams.geometries = [inputpoint];
                    prjParams.outSR = outSR;

                     gsvc.project(prjParams);

                     gsvc.on("project-complete",function(outputpoint){
                        resolve(outputpoint);
                    });

                    gsvc.on("error",function(err){
                        reject(err);
                    })
                });
        }));//promise
    }

Thanks

Muralidhar Moka

Re: How to convert an array of (X,Y) point to (Lat,Long)

KellyHutchins — Fri, 26 Jul 2019 16:54:02 GMT

ProjectParameters.geometries accepts an array of input geometries to project. So instead of providing one point as you do in your code above

 prjParams.geometries = [inputpoint];

You can loop through all your x,y coordinates create input points and set them all to the prjParams.geometries.

topic How to convert an array of (X,Y) point to (Lat,Long) in ArcGIS JavaScript Maps SDK Questions

How to convert an array of (X,Y) point to (Lat,Long)

Re: How to convert an array of (X,Y) point to (Lat,Long)