Symbolika bodů podle polohy

ThomasButton

Ahoj všichni, POMOC.

Potřebuji / chtěl bych změnit symboliku, konkrétně barvu bodu z jedné vrstvy podle jeho polohy vůči bodu v jiné vrstvě. Například pokud se bod z vrstvy A nachází do 10 metrů od bodu z vrstvy B, změní se na zelený, a pokud ne, bude červený. Mám hexadecimální kódy barev, o kterých vím, že je lze použít v Arcade, takže to není problém. 

Nejsem programátor, ale rychle se učím. Zkoušel to už někdo nebo něco podobného? (Určitě ano.) Pokud ano, ocenil bych trochu pomoci. S Esri a GIS začínám teprve v posledních měsících, takže se mám hodně co učit

Moc předem děkuji.

XanderBakker

The functionality available inside an Arcade expression depends on where is it applied (the profile so to speak). For a point from label A to know something about a point from layer B, requires access to another layer with functions like FeatureSetBy* and those are not available in the symbology profile. You can however create an additional field and calculate that field using an Arcade expression with access to the other layer. 

I can imagine you would do something like this:

<SPAN class="comment token">// create a buffer of 10m arround your point in layer A</SPAN>
<SPAN class="keyword token">var</SPAN> BufferA <SPAN class="operator token">=</SPAN> <SPAN class="token function">BufferGeodetic</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">10</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'meters'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

<SPAN class="comment token">// Access your layer B</SPAN>
<SPAN class="keyword token">var</SPAN> LayerB <SPAN class="operator token">=</SPAN> <SPAN class="token function">FeatureSetByName</SPAN><SPAN class="punctuation token">(</SPAN>$datastore<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"LayerB"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

<SPAN class="comment token">// Intersect the buffer A and layer B;</SPAN>
<SPAN class="keyword token">var</SPAN> IntersectAandB <SPAN class="operator token">=</SPAN> <SPAN class="token function">Intersects</SPAN><SPAN class="punctuation token">(</SPAN>LayerB<SPAN class="punctuation token">,</SPAN> BufferA<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

<SPAN class="comment token">// To speed this up with a single request you can nest the statements above:</SPAN>
<SPAN class="keyword token">var</SPAN> IntersectAandB <SPAN class="operator token">=</SPAN> <SPAN class="token function">Intersects</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">FeatureSetByName</SPAN><SPAN class="punctuation token">(</SPAN>$datastore<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"LayerB"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token function">BufferGeodetic</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">,</SPAN> <SPAN class="number token">10</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'meters'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

<SPAN class="comment token">// Check the number of features found</SPAN>
<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="token function">Count</SPAN><SPAN class="punctuation token">(</SPAN>InterectAandB<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="string token">"green"</SPAN><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">return</SPAN> <SPAN class="string token">"red"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

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