HI How to query graphiclayer with polygon ? Thank you.

Chengyi, Well then you need to do exactly what I mentioned then. require ( [ "esri/geometry/geometryEngine" ] , function ( geometryEngine ) { view . graphics . forEach ( function ( gra ) { if ( geometryEngine . intersects ( gra , userDrawnGraphic ) ) { /* now do something */ } } ) ; } ) ;

nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Query Graphic

chengyiwang

How to query graphiclayer with polygon ?

Thank you.

Finde mehr Beiträge mit dem Tag

Accepted answers

rscheitlin

Chengyi,

Well then you need to do exactly what I mentioned then.

<SPAN class="token function">require</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">"esri/geometry/geometryEngine"</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>geometryEngine<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN> 
&nbsp; view<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN><SPAN class="token function">forEach</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>gra<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN><SPAN class="punctuation token">(</SPAN>geometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">intersects</SPAN><SPAN class="punctuation token">(</SPAN>gra<SPAN class="punctuation token">,</SPAN> userDrawnGraphic<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">/* now do something */</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">}</SPAN>
&nbsp; <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="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

chengyiwang

Scheitlin

year,this is I needed. thankyou verymuch.

rscheitlin

Chengyi,

Well then you need to do exactly what I mentioned then.

<SPAN class="token function">require</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">"esri/geometry/geometryEngine"</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>geometryEngine<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN> 
&nbsp; view<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN><SPAN class="token function">forEach</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>gra<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN><SPAN class="punctuation token">(</SPAN>geometryEngine<SPAN class="punctuation token">.</SPAN><SPAN class="token function">intersects</SPAN><SPAN class="punctuation token">(</SPAN>gra<SPAN class="punctuation token">,</SPAN> userDrawnGraphic<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <SPAN class="comment token">/* now do something */</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="punctuation token">}</SPAN>
&nbsp; <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="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

chengyiwang

Thank you very much !

Let me explain. Many ploygon are drawn on the graphic when the map is initialized,then I want to draw a new ploygon to search the old ploygon with 4.5 arcgis api for javascript . How to do?

rscheitlin

To query a graphics layer you have to loop through the layers graphics and perform your operation on each graphic.

You can use GeometryEngine methods like intersects:

https://developers.arcgis.com/javascript/3/jsapi/esri.geometry.geometryengine-amd.html#intersects

Or if the geometry you want to check is a point geometry, to check if it is inside a polygon then you can use Polygon.contains

https://developers.arcgis.com/javascript/3/jsapi/polygon-amd.html#contains

Nimm an der Unterhaltung teil

Angemeldete Mitglieder können Beiträge verfassen, Updates folgen und mehr. Neu hier? Registriere ein kostenloses Konto.

Schnellzugriffe

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.