Hi,
I am trying to obtain the screen coordinates of a particular location in a MapView using a code similar to this:
<SPAN class="keyword token">var</SPAN> webmap <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">WebMap</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> view <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">MapView</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> lat <SPAN class="operator token">=</SPAN> <SPAN class="token function">Number</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="number token">32.473565</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> lon <SPAN class="operator token">=</SPAN> <SPAN class="token function">Number</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">93.791870</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> testPoint <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">Point</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">{</SPAN>type<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"point"</SPAN><SPAN class="punctuation token">,</SPAN> latitude<SPAN class="punctuation token">:</SPAN> lat<SPAN class="punctuation token">,</SPAN> longitude<SPAN class="punctuation token">:</SPAN> lon<SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> testScreen <SPAN class="operator token">=</SPAN> view<SPAN class="punctuation token">.</SPAN><SPAN class="token function">toScreen</SPAN><SPAN class="punctuation token">(</SPAN>testPoint<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>However, I keep getting a null testScreen variable. I assume the error is in line 5, but the Point object gets created, it seems, without any errors. I left out the require statements but I am including "esri/geometry/Point" and
"esri/geometry/ScreenPoint". Could someone provide some sample code that shows how to use toScreen to go from a given latitude/longitude to screen coordinates?
Thanks.
