Waarom geeft mijn Arcade-expressie geen label weer in ArcGIS Online (terwijl de test wel slaagt)?

Question

Ik heb de onderstaande label-expressie geschreven om de leidinglengte en de vorm van de doorsnede te controleren en te bepalen of en hoe er een label voor een leiding wordt weergegeven. In ArcGIS Pro werkt de expressie prima. Wanneer ik de expressie in ArcGIS Online plak, wordt de code gevalideerd en wordt, zoals verwacht, een teststring weergegeven (voor beide labelfuncties in de expressie). Er worden echter geen labels op de kaart weergegeven. Ik heb een vergelijkbare (en eenvoudigere) functie die prima werkt. function ChooseLabelFormat(ML,PL,Sec){ //Roept de labelfunctie aan op basis van de leidingvorm return When( PL >= ML && Sec == 'Circular', GetMainLabel ($feature.NominalDiameter,$feature.Material), PL >= ML && Sec != 'Circular', GetMainLabelNC ($feature.Material,$feature.BoxHeight,$feature.BoxWidth), "") }; function GetMainLabel(Dia,Mat){ //Geeft de diameter en/of het materiaal terug, met uitzondering van de waarden -999 en Unk return When( Dia !=-999 && Mat != "Unk", Dia + "'' " + Mat, Dia !=-999 && Mat == "Unk", Dia + "''", Dia ==-999 && Mat != "Unk", Mat, "") }; function GetMainLabelNC(Mat,BH,BW){ //Geeft de hoogte x breedte en/of het materiaal terug, met uitzondering van de waarden -999 en Unk return When( BH !=-999 && Mat != "Unk", BH + "'' x " + BW + "'' " + Mat, BH !=-999 && Mat == "Unk", BH + "'' x " + BW + "'' ", BH ==-999 && Mat != "Unk", Mat, "") }; //Stelt variabelen in en roept de functie aan om labels weer te geven var Section = DomainName($feature, 'CrossSectionShape'); // Stel MinLabel in op de minimale objectlengte waarvoor een label wordt weergegeven: var MinLabel = 50; var PipeLen = $feature.SHAPE__Length; //var PipeLen = Length(Geometry($feature), 'feet') return ChooseLabelFormat(MinLabel,PipeLen,Section);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

XanderBakker · Answer

OK, so for some reason it does not like the functions (I guess). If I use this expression it seems to work: var Sec = DomainName($feature, 'CrossSectionShape'); var ML = 50; var PL = $feature.SHAPE__Length; var Dia = $feature.NominalDiameter; var Mat = $feature.Material; var BH = $feature.BoxHeight; var BW = $feature.BoxWidth; var GetMainLabel = When( Dia !=-999 && Mat != "Unk", Dia + "'' " + Mat, Dia !=-999 && Mat == "Unk", Dia + "''", Dia ==-999 && Mat != "Unk", Mat, ""); var GetMainLabelNC = When( BH !=-999 && Mat != "Unk", BH + "'' x " + BW + "'' " + Mat, BH !=-999 && Mat == "Unk", BH + "'' x " + BW + "'' ", BH ==-999 && Mat != "Unk", Mat, ""); var result = When( PL >= ML && Sec == 'Circular', GetMainLabel, PL >= ML && Sec != 'Circular', GetMainLabelNC, ""); return result;‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

XanderBakker · Answer

That is indeed very strange behavior. When I use the label expression and use it in the pop-up, it validates correctly with every feature. However, it does not return something in the pop-up or label. Very strange. I tried to rewrite the code and this resulted in the same behavior. function ChooseLabelFormat(ML,PL,Sec){ //Calls the label function based on pipe shape if (PL >= ML) { if (Sec == 'Circular') { return GetMainLabel($feature.NominalDiameter,$feature.Material); } else { return GetMainLabelNC($feature.Material,$feature.BoxHeight,$feature.BoxWidth); } } else { return ""; } } function GetMainLabel(Dia,Mat){ //Returns Diameter and/or material excluding -999 and Unk values if (Dia !=-999) { if (Mat != "Unk") { return Dia + "'' " + Mat; } else { return Dia + "''"; } } else { if (Mat != "Unk") { return Mat; } else { return ""; } } } function GetMainLabelNC(Mat,BH,BW){ //Returns HeightxWidth and/or material excluding -999 and Unk values if (BH !=-999) { if (Mat != "Unk") { return BH + "'' x " + BW + "'' " + Mat; } else { return BH + "'' x " + BW + "'' "; } } else { if (Mat != "Unk") { return Mat; } else { return ""; } } } //Set variables and call function for labeleling var Section = DomainName($feature, 'CrossSectionShape'); // Set MinLabel value as the minimum feature length to be labeled: var MinLabel = 50; var PipeLen = $feature.SHAPE__Length; //var PipeLen = Length(Geometry($feature), 'feet') return ChooseLabelFormat(MinLabel,PipeLen,Section);‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ Maybe something for support? If I retrieve the WKID of the geometry it will return 102100 (Web Mercator Auxiliary Sphere): return $feature.OBJECTID; // returns 306 return Geometry($feature).spatialReference["wkid"]; // returns 102100 which is (Web Mercator Auxiliary Sphere) return Length($feature, "meter"); // returns 22.8405.... return Length($feature, "feet"); // returns 74.9362.... return $feature["Shape__Length"]; // returns 57.2223.... return LengthGeodetic($feature, "meter"); // returns 17.4116.... return LengthGeodetic($feature, "feet"); // returns 57.1249.... ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ So the Shape__Length represents the length in feet (Geodetic). I will try one last thing to see if it works...

RobBlash · Answer

Thanks Xander Bakker‌ See example here: http://arcg.is/1Tzjiq There is one layer with the code in my original post, which does not produce a label. There is a second layer with the code shown below that does produce a label. //Returns Diameter and/or material excluding -999 and Unk values function GetMainLabel(Dia,Mat) { return When(Dia !=-999 && Mat != "Unk", Dia + "'' " + Mat, Dia !=-999 && Mat == "Unk", Dia + "''", Dia ==-999 && Mat != "Unk", Mat,"") } // Set MinLabel value as the minimum feature length to be labeled: var MinLabel = 50; var PipeLen = $feature.SHAPE__Length; //var PipeLen = Length(Geometry($feature), 'feet'); iif (PipeLen >= MinLabel, GetMainLabel ($feature.NominalDiameter,$feature.Material),'');‍‍‍‍‍‍‍‍‍ Regarding the length, that's actually commented out and the length is taken from Shape__Length. However, the data was in NJ State Plane when published, and it's my understanding that it stays that way and gets projected on the fly in AGOL. Is this not correct? The spatial reference WKID is 102711 (NJ state plane NAD83)per the json (see screen shot)