topic Re: lat,lng to webmercator in ArcGIS JavaScript Maps SDK Questions

lat,lng to webmercator

timgogl — Sat, 11 Dec 2021 19:58:03 GMT

ok, well i have been searching for info on this for a chunk of the day today, and finally found this thread that looked like it was what i needed....

so i new have this function:

  function findLocation(){
   
   console.log('find location');
   var lat = latToFind;  //44.071
   var lng = lngToFind; //-122.199
   
   console.log('make new point');
   var pt = new esri.geometry.Point(lng,lat,new esri.SpatialReference({'wkid':2994}));
   console.log(pt);
   console.log('make new webmercator point');
   var xyPt = new esri.geometry.geographicToWebMercator(pt);
   console.log(xyPt);
   var symbol = new esri.symbol.SimpleMarkerSymbol(esri.symbol.SimpleMarkerSymbol.STYLE_DIAMOND, 14,
           new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID,
            new dojo.Color(MARK_OUTLINE_COLOR), 2), new dojo.Color(MARK_FILL_COLOR));
   var graphic = new esri.Graphic(xyPt,symbol);
   
   console.log('add graphic');
   map.graphics.add(graphic);
   
  }

so, this code all seams to run ok... the console logs all my messages with no errors.
however....

my graphic is not being added to the map (or at least not on the visible map).

when i examine the xyPt information inside the console, i noticed that the wkid is 102100.

so, my question is, what am i doing wrong, how can i get this functionality but have the wkid remain 2994?

thanks for any help you can offer.

Re: lat,lng to webmercator

timgogl — Wed, 22 Dec 2010 23:19:24 GMT

ok. i got this one figured out... i need to use the project method from the geometry service....

thanks for taking a look.

Re: lat,lng to webmercator

PaulForbess — Mon, 03 Jan 2011 19:55:26 GMT

there are also these methods:

esri.geometry.webMercatorToGeographic(geometry)
esri.geometry.geographicToWebMercator(geometry)

Re: lat,lng to webmercator

BrandonCales — Sat, 11 Dec 2021 19:58:06 GMT

Mind sharing your code?

ok, well i have been searching for info on this for a chunk of the day today, and finally found this thread that looked like it was what i needed....

so i new have this function:
  function findLocation(){
   
   console.log('find location');
   var lat = latToFind;  //44.071
   var lng = lngToFind; //-122.199
   
   console.log('make new point');
   var pt = new esri.geometry.Point(lng,lat,new esri.SpatialReference({'wkid':2994}));
   console.log(pt);
   console.log('make new webmercator point');
   var xyPt = new esri.geometry.geographicToWebMercator(pt);
   console.log(xyPt);
   var symbol = new esri.symbol.SimpleMarkerSymbol(esri.symbol.SimpleMarkerSymbol.STYLE_DIAMOND, 14,
           new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID,
            new dojo.Color(MARK_OUTLINE_COLOR), 2), new dojo.Color(MARK_FILL_COLOR));
   var graphic = new esri.Graphic(xyPt,symbol);
   
   console.log('add graphic');
   map.graphics.add(graphic);
   
  }
so, this code all seams to run ok... the console logs all my messages with no errors.
however....

my graphic is not being added to the map (or at least not on the visible map).

when i examine the xyPt information inside the console, i noticed that the wkid is 102100.

so, my question is, what am i doing wrong, how can i get this functionality but have the wkid remain 2994?

thanks for any help you can offer.