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Query - Spatial Relationship

jaykapalczynski

I am trying to query and return data from a spatial relationship.

I have a county layer with many counties

I have another Layer that has larger polygons that are made up of multiple counties.

I want to use the larger polygon to select the smaller polygons that would be inside the geometry of the larger polygon.

I have tried all the possible spatial relationships

I think my issue is that the boundaries of the two Feature Layers coincide. Is there any other way to query these? Can I search by centroid of the polygon layer (create a centroid on the fly?)

        <SPAN class="keyword token">function</SPAN> <SPAN class="token function">queryCountiesthatIntersect</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
            <SPAN class="keyword token">var</SPAN> query <SPAN class="operator token">=</SPAN> countyLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">createQuery</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
            query<SPAN class="punctuation token">.</SPAN>geometry <SPAN class="operator token">=</SPAN> resultsLayer<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">;</SPAN> 
            query<SPAN class="punctuation token">.</SPAN>spatialRelationship <SPAN class="operator token">=</SPAN> <SPAN class="string token">"index-intersects"</SPAN><SPAN class="punctuation token">;</SPAN>
            query<SPAN class="punctuation token">.</SPAN>outFields <SPAN class="operator token">=</SPAN> <SPAN class="string token">"*"</SPAN><SPAN class="punctuation token">;</SPAN>
            query<SPAN class="punctuation token">.</SPAN>returnGeometry <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>

            <SPAN class="keyword token">return</SPAN> countyLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">queryFeatures</SPAN><SPAN class="punctuation token">(</SPAN>query<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>‍</SPAN><SPAN>‍</SPAN></SPAN>

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Accepted answers

rscheitlin

Jay,

There is redundancy in your code.

        <SPAN class="keyword token">function</SPAN> <SPAN class="token function">displayResults2</SPAN><SPAN class="punctuation token">(</SPAN>results<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
            <SPAN class="keyword token">var</SPAN> testPoly <SPAN class="operator token">=</SPAN> resultsLayer2<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">;</SPAN>
            <SPAN class="keyword token">var</SPAN> finalFeats <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
            results<SPAN class="punctuation token">.</SPAN>features<SPAN class="punctuation token">.</SPAN><SPAN class="token function">map</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>testPoly<SPAN class="punctuation token">.</SPAN><SPAN class="token function">contains</SPAN><SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">.</SPAN>centroid<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                    <SPAN class="keyword token">var</SPAN> cGra <SPAN class="operator token">=</SPAN> graphic<SPAN class="punctuation token">.</SPAN><SPAN class="token function">clone</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                    cGra<SPAN class="punctuation token">.</SPAN>symbol <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN>
                      type<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"simple-fill"</SPAN><SPAN class="punctuation token">,</SPAN>
                      style<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"solid"</SPAN><SPAN class="punctuation token">,</SPAN>
                      color<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="number token">240</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">248</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">255</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0.9</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
                      size<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"10px"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="comment token">// pixels</SPAN>
                      outline<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">{</SPAN>
                        <SPAN class="comment token">// autocasts as new SimpleLineSymbol()</SPAN>
                        color<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="number token">191</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">42</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">18</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0.9</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
                        width<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">1</SPAN> <SPAN class="comment token">// points</SPAN>
                      <SPAN class="punctuation token">}</SPAN>
                    <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">;</SPAN>
                    finalFeats<SPAN class="punctuation token">.</SPAN><SPAN class="token function">push</SPAN><SPAN class="punctuation token">(</SPAN>cGra<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                    resultsLayer3<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addMany</SPAN><SPAN class="punctuation token">(</SPAN>finalFeats<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="punctuation token">.</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

jaykapalczynski

Having a hard time following this..

I have:

CountyLayer var countyLayerWebMercator = new FeatureLayer({

this is the full county layer with hundreds of polygons

resultsLayer2 this is a graphic layer that houses the large polygon for the query.

this is the poly that I want to identify all the counties from the County Layer above

resultsLayer3 this is the graphics layer where I want to write all the counties that are within the resultsLayer2

all the polygons that have their centroid in resultsLayer2

Am I missing something?

<SPAN class="comment token">// SNIP CODE ABOVE BUT HERE IS TEH CALL </SPAN>

            <SPAN class="token function">queryCountiesthatIntersect</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="token function">then</SPAN><SPAN class="punctuation token">(</SPAN>displayResults2<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>err<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                console<SPAN class="punctuation token">.</SPAN><SPAN class="token function">log</SPAN><SPAN class="punctuation token">(</SPAN>err<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">function</SPAN> <SPAN class="token function">queryCountiesthatIntersect</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
            <SPAN class="keyword token">var</SPAN> query <SPAN class="operator token">=</SPAN> countyLayerWebMercator<SPAN class="punctuation token">.</SPAN><SPAN class="token function">createQuery</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
            query<SPAN class="punctuation token">.</SPAN>geometry <SPAN class="operator token">=</SPAN> resultsLayer2<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">;</SPAN> 
            query<SPAN class="punctuation token">.</SPAN>spatialRelationship <SPAN class="operator token">=</SPAN> <SPAN class="string token">"intersects"</SPAN><SPAN class="punctuation token">;</SPAN>
            query<SPAN class="punctuation token">.</SPAN>outFields <SPAN class="operator token">=</SPAN> <SPAN class="string token">"*"</SPAN><SPAN class="punctuation token">;</SPAN>
            query<SPAN class="punctuation token">.</SPAN>returnGeometry <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>

            <SPAN class="keyword token">return</SPAN> countyLayerWebMercator<SPAN class="punctuation token">.</SPAN><SPAN class="token function">queryFeatures</SPAN><SPAN class="punctuation token">(</SPAN>query<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="punctuation token">}</SPAN>


        <SPAN class="keyword token">function</SPAN> <SPAN class="token function">displayResults2</SPAN><SPAN class="punctuation token">(</SPAN>results<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>

            queryCountiesthatIntersect<SPAN class="punctuation token">.</SPAN><SPAN class="token function">then</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>results<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>

                <SPAN class="keyword token">var</SPAN> testPoly <SPAN class="operator token">=</SPAN> resultsLayer2<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">;</SPAN>

                results<SPAN class="punctuation token">.</SPAN>features<SPAN class="punctuation token">.</SPAN><SPAN class="token function">map</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                    <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>testPoly<SPAN class="punctuation token">.</SPAN><SPAN class="token function">contains</SPAN><SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">.</SPAN>centroid<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                        <SPAN class="comment token">//Now you know if the centroid of the county is in your polygon</SPAN>
                        <SPAN class="comment token">// and you can add that graphic to the map or whatever...</SPAN>
                        <SPAN class="comment token">// alert(testPoly.length);</SPAN>

                        <SPAN class="keyword token">var</SPAN> features3 <SPAN class="operator token">=</SPAN> graphic<SPAN class="punctuation token">.</SPAN>features<SPAN class="punctuation token">.</SPAN><SPAN class="token function">map</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
                            graphic<SPAN class="punctuation token">.</SPAN>symbol <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">{</SPAN>
                                type<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"simple-fill"</SPAN><SPAN class="punctuation token">,</SPAN>
                                style<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"solid"</SPAN><SPAN class="punctuation token">,</SPAN>
                                color<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="number token">240</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">248</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">255</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0.9</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
                                size<SPAN class="punctuation token">:</SPAN> <SPAN class="string token">"10px"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="comment token">// pixels</SPAN>
                                outline<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">{</SPAN>
                                    <SPAN class="comment token">// autocasts as new SimpleLineSymbol()</SPAN>
                                    color<SPAN class="punctuation token">:</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="number token">191</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">42</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">18</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0.9</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN>
                                    width<SPAN class="punctuation token">:</SPAN> <SPAN class="number token">1</SPAN> <SPAN class="comment token">// points</SPAN>
                                <SPAN class="punctuation token">}</SPAN>
                            <SPAN class="punctuation token">}</SPAN><SPAN class="punctuation token">;</SPAN>
                            <SPAN class="keyword token">return</SPAN> graphic<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> numCounties <SPAN class="operator token">=</SPAN> features3<SPAN class="punctuation token">.</SPAN>length<SPAN class="punctuation token">;</SPAN>
                        <SPAN class="token function">alert</SPAN><SPAN class="punctuation token">(</SPAN>numCounties<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
                        resultsLayer3<SPAN class="punctuation token">.</SPAN><SPAN class="token function">addMany</SPAN><SPAN class="punctuation token">(</SPAN>features3<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="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>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

rscheitlin

Jay,

the best I know of is that you can get the polygon centroid like this

<SPAN class="keyword token">var</SPAN> countyCentroid <SPAN class="operator token">=</SPAN> feature<SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">.</SPAN>cetroid<SPAN class="punctuation token">;</SPAN>‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

So you would do your query like this:

<SPAN class="keyword token">function</SPAN> <SPAN class="token function">queryCountiesthatIntersect_step1</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
  <SPAN class="keyword token">var</SPAN> query <SPAN class="operator token">=</SPAN> countyLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">createQuery</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
  query<SPAN class="punctuation token">.</SPAN>geometry <SPAN class="operator token">=</SPAN> resultsLayer<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">;</SPAN> 
  query<SPAN class="punctuation token">.</SPAN>spatialRelationship <SPAN class="operator token">=</SPAN> <SPAN class="string token">"intersects"</SPAN><SPAN class="punctuation token">;</SPAN>
  query<SPAN class="punctuation token">.</SPAN>outFields <SPAN class="operator token">=</SPAN> <SPAN class="string token">"*"</SPAN><SPAN class="punctuation token">;</SPAN>
  query<SPAN class="punctuation token">.</SPAN>returnGeometry <SPAN class="operator token">=</SPAN> <SPAN class="keyword token">true</SPAN><SPAN class="punctuation token">;</SPAN>

  <SPAN class="keyword token">return</SPAN> countyLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">queryFeatures</SPAN><SPAN class="punctuation token">(</SPAN>query<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>‍</SPAN><SPAN>‍</SPAN></SPAN>

then find if the resulting counties centroid is inside the polygon.

queryCountiesthatIntersect_step1<SPAN class="punctuation token">.</SPAN><SPAN class="token function">then</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN><SPAN class="punctuation token">(</SPAN>results<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
  <SPAN class="keyword token">var</SPAN> testPoly <SPAN class="operator token">=</SPAN> resultsLayer<SPAN class="punctuation token">.</SPAN>graphics<SPAN class="punctuation token">.</SPAN>items<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">.</SPAN>geometry‍‍<SPAN class="punctuation token">;</SPAN>
  results<SPAN class="punctuation token">.</SPAN>features<SPAN class="punctuation token">.</SPAN><SPAN class="token function">map</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">function</SPAN> <SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">if</SPAN><SPAN class="punctuation token">(</SPAN>testPoly<SPAN class="punctuation token">.</SPAN><SPAN class="token function">contains</SPAN><SPAN class="punctuation token">(</SPAN>graphic<SPAN class="punctuation token">.</SPAN>geometry<SPAN class="punctuation token">.</SPAN>centroid<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">{</SPAN>
      <SPAN class="comment token">//Now you know if the centroid of the county is in your polygon</SPAN>
      <SPAN class="comment token">// and you can add that graphic to the map or whatever...</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="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

jaykapalczynski

Can I grab the centroid for Query?

Can I somehow tell the query to look at the centroids of each little county and use those centroids to find the ones that are "contained"????

var parcelCentroid = feature.geometry.getExtent().getCenter();

query Object

Describes query operations that can be performed on features in the layer.

Specification:

maxRecordCount Number

The maximum number of records that will be returned for a given query.

supportsCentroid Boolean

Indicates if the geometry centroid associated with each polygon feature can be returned. This operation is only supported in ArcGIS Online hosted feature services.

jaykapalczynski

Should Return 11

Returns 3: Contains only gives me the ones that are completely contained within the Large Polygon....it does not give me the ones that are touching the boundary of the Large Polygon....those lines coincide and are not selected with Contains.

Returns 19: If I use Overlaps I get this....I get the ones that lie outside selected because the lines coincide.

rscheitlin

Jay,

I would try overlaps or contains.

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