Arcade Expression - intersecting feature sets with overlapping/split attribute options
Here is what I have so far:
var intersectLayer =Intersects(FeatureSetByName($map,"PC FPs nonTidal Regulated"), $feature)
var Hazard = "";
for (var f in intersectLayer) {
if (Hazard == "") {
Hazard = f.PC_FHA
} else {
Hazard += " And " + f.PC_FHA;
}
}
return Hazard
What I am looking for next is when there's a parcel that intersects both PC_FHA_NonTidal And PC_FHA_Floodway_NonTidal, I want it to return the option with a higher risk for instance PC_FHA_NonTidal. The parcel referenced is within both areas (hatched and blue symbology) and I want to default to the higher risk flood answer (whatever it ends up being- this is for proof of concept at this stage). The end goal is to have all the risk layer intersections added to the parcel layer for customers to find out information but I am stuck when there are multiple options for a specific parcel boundaries. The popup will end up being very similar to the floodplain inquiry solution but more specific parameters because I want to default to a specific answer when multiple intersecting options are found. Does that make sense? Thank you!
Hi Allison Goldberg ,
I had a moment to think about how to avoid these redundant lines and this is what should work:
var FEMA = OrderBy(Intersects($feature, FeatureSetByName($map,"FEMASupportData - Storm Surge 2016")), "CATEGORY DES");
var cnt = Count(FEMA);
var parcelarea = AreaGeodetic($feature, "square-feet");
var result = "FEMA:";
var dct = {};
if (cnt > 0) {
for (var FEMApol in FEMA) {
var intersectarea = AreaGeodetic(Intersection($feature, FEMApol), "square-feet");
var category = Text(FEMApol.CATEGORY);
if (HasKey(dct, category)) {
dct[category] += intersectarea;
} else {
dct[category] = intersectarea;
}
}
for (var category in dct) {
var percentage = (dct[category] * 100.0) / parcelarea;
result += TextFormatting.NewLine + " - Category: " + category + " (" + Round(percentage, 2) + "%)";
}
} else {
result = "No risk detected";
}
return result;and a visual result:
I was hoping you could maybe help me again for another application. I am working on an attribute expression that involves multipart features. Do I need to convert to single-part to get the desired results? I want to display all future land use options but not duplicate the values. Currently it is showing each multi-part option multiple times. Ideally I would like it (for this example) to be P/ROS/RL. Any idea how to properly format that so the value in the attribute expression occurs only one time? This is what I have so far to display all potential options but want to remove it when it show up multiple times:
var intersectLayer =Intersects(FeatureSetByName($map,"Future Land Use - Unincorporated"), $feature)
var FutureLandUse = "";
for (var f in intersectLayer) {
if (FutureLandUse == "") {
FutureLandUse = f.LANDUSECODE
} else {
FutureLandUse += " / " + f.LANDUSECODE;
}
}
return FutureLandUse
Any help would be appreciated. Can't seem to find much documentation related to this issue, only ones associated with removing duplicates for labeling. Thank you.
