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Arcade im Label-Profil - Verwendung von zeitaktivierten Daten

EleanorDhuyvetter

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Hallo nochmal! <\/P>

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Ich wollte Arcade verwenden, um Labels zu erstellen, die Temperaturänderungen an Wetterstationen anzeigen. Die Stationsdaten stammen von einem REST-Link von nowcast's<\/A>-Website und sind zeitaktiviert, mit einigen Stunden vergangener Beobachtungen sowie der aktuellen zu jedem Zeitpunkt. An jedem Stationsstandort wollte ich jede aktuelle und -2-Stunden-Temperaturbeobachtung herausfiltern, dann die Differenz für eine einfache Trendanalyse finden und diese Differenz anzeigen. Der Code unten funktioniert bis zum Finden einer Temperatur für "aktuelle Zeit - 2 Stunden" (denke ich). Ich glaube nicht, dass ich diesen Teil korrekt schreibe, da die Daten zeitaktiviert sind.. Oder ich könnte etwas anderes übersehen. Wenn ich das jedoch ausführe, zeigt es mir nur die aktuelle Stationstemperatur an, daher denke ich, dass es die Daten von vor 2 Stunden nicht abruft. Ich habe das mit nur einem 1-Stunden-Zeitschritt getestet, und die Werte waren immer noch dieselben wie zur aktuellen Zeit. <\/P>

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Wenn Sie Einblicke in die Arbeit mit zeitaktivierten Layern über Arcade im Label-Profil haben, wäre ich sehr dankbar. Danke! <\/STRONG><\/P><\/P>\/\/ Definiere verwendete Variablen
$feature.obstime;
$feature["tmdb_f"];<\/P><\/P>\/\/ Setze die für die Trendanalyse verwendeten Zeiten<\/P>var current = DateAdd($feature.obstime, 0, "hours")
var not_current = DateAdd($feature.obstime, -2, "hours")<\/P><\/P>\/\/ Ziehe Temperaturwerte für jede obige Zeit heraus<\/P>var current_temp = 0
var previous_temp = 0<\/P>if ($feature.obstime == current) {
current_temp = $feature["tmdb_f"]
}<\/P>else if ($feature.obstime == not_current){
previous_temp = $feature["tmdb_f"]
}<\/P>
\/\/ Subtrahiere den aktuellen Wert vom vorherigen<\/P>var temp_trend = current_temp - previous_temp<\/P>return text(temp_trend) <\/P><\/P><\/BODY><\/HTML>

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XanderBakker

Just noticed that you are looking to do this in the label profile. This will not be possible since the FeatureSetBy functions that you will need are not available in the label profile.

All comments

XanderBakker

You are going to face a couple of challanges, although it is possible to access the multitemporal data and try to analyze the trend.

The obstime attribute is often empty. However there are 5 other fields that you can possibly use instead
Since the multitemporal data is represented by multiple points at the same location, the Arcade expression will be applied to all the points. In some case there will not be an observation two hours before
You will have to collect all the observations through filtering the locid, sort them by date and represent the current temp and the temp two hours before for each observation at the location.

XanderBakker

Just did a little test, but the data does not allow you to use the FeatureSetBy* functions, so there will be no way for Arcade to access the different observations at a single location.

Edit: When the layer is added separately, you do have access, so it is possible. Will post back a solution later.

XanderBakker

Below an example of what you can do. However, when I tested this, for some strange reason the data retrieved does not correspond to the data I retrieve manually. I will look into it later and see if I can correct the error.

<SPAN class="keyword token">var</SPAN> locid <SPAN class="operator token">=</SPAN> $feature<SPAN class="punctuation token">.</SPAN>locid<SPAN class="punctuation token">;</SPAN> <SPAN class="comment token">// "KELP"; </SPAN>
<SPAN class="keyword token">var</SPAN> sql <SPAN class="operator token">=</SPAN> <SPAN class="string token">"locid = '"</SPAN> <SPAN class="operator token">+</SPAN> locid <SPAN class="operator token">+</SPAN> <SPAN class="string token">"'"</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN>sql<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> fldlist <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">"locid"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"obstime"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"tmdb_f"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"validtime"</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> observations <SPAN class="operator token">=</SPAN> <SPAN class="token function">OrderBy</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Filter</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">FeatureSetByName</SPAN><SPAN class="punctuation token">(</SPAN>$map<SPAN class="punctuation token">,</SPAN><SPAN class="string token">"Station scale5"</SPAN><SPAN class="punctuation token">,</SPAN> fldlist<SPAN class="punctuation token">,</SPAN> False<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> sql<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"validtime ASC"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> cnt <SPAN class="operator token">=</SPAN> <SPAN class="token function">Count</SPAN><SPAN class="punctuation token">(</SPAN>observations<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN>cnt<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> result <SPAN class="operator token">=</SPAN> <SPAN class="string token">""</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>cnt <SPAN class="operator token">>=</SPAN> <SPAN class="number token">3</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"start"</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> i <SPAN class="operator token">=</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">for</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">var</SPAN> obs <SPAN class="keyword token">in</SPAN> observations<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        i <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> <SPAN class="number token">1</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN>obs<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">" - "</SPAN> <SPAN class="operator token">+</SPAN> i <SPAN class="operator token">+</SPAN> <SPAN class="string token">": "</SPAN> <SPAN class="operator token">+</SPAN> obs<SPAN class="punctuation token">.</SPAN>validtime <SPAN class="operator token">+</SPAN> <SPAN class="string token">" - "</SPAN> <SPAN class="operator token">+</SPAN> obs<SPAN class="punctuation token">.</SPAN>tmdb_f <SPAN class="operator token">+</SPAN> <SPAN class="string token">" - "</SPAN> <SPAN class="operator token">+</SPAN> obs<SPAN class="punctuation token">.</SPAN>obstime<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>i <SPAN class="operator token">==</SPAN> cnt<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
            <SPAN class="keyword token">var</SPAN> temp_curr <SPAN class="operator token">=</SPAN> obs<SPAN class="punctuation token">.</SPAN>tmdb_f<SPAN class="punctuation token">;</SPAN>
            <SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"found current..."</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
        <SPAN class="punctuation token">}</SPAN> 
        <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>i <SPAN class="operator token">==</SPAN> cnt<SPAN class="number token">-2</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
            <SPAN class="keyword token">var</SPAN> temp_min2 <SPAN class="operator token">=</SPAN> obs<SPAN class="punctuation token">.</SPAN>tmdb_f<SPAN class="punctuation token">;</SPAN>
            <SPAN class="token function">Console</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Found minus 2..."</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">var</SPAN> dif_temp <SPAN class="operator token">=</SPAN> temp_curr <SPAN class="operator token">-</SPAN> temp_min2<SPAN class="punctuation token">;</SPAN>
    result <SPAN class="operator token">=</SPAN> <SPAN class="string token">"Current temperature: "</SPAN> <SPAN class="operator token">+</SPAN> temp_curr <SPAN class="operator token">+</SPAN> <SPAN class="string token">"°F"</SPAN><SPAN class="punctuation token">;</SPAN>
    result <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> <SPAN class="string token">"Temperature 2 hours before: "</SPAN> <SPAN class="operator token">+</SPAN> temp_min2 <SPAN class="operator token">+</SPAN> <SPAN class="string token">"°F"</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>dif_temp <SPAN class="operator token">></SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        result <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> <SPAN class="string token">"Temperature has increased by "</SPAN> <SPAN class="operator token">+</SPAN> dif_temp <SPAN class="operator token">+</SPAN> <SPAN class="string token">"°F"</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>dif_temp <SPAN class="operator token"><</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
        result <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> <SPAN class="string token">"Temperature has decreased by "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>dif_temp<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"°F"</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
        result <SPAN class="operator token">+</SPAN><SPAN class="operator token">=</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> <SPAN class="string token">"No change in temperature"</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>
<SPAN class="punctuation token">}</SPAN> <SPAN class="keyword token">else</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// number of observations less than 3}</SPAN>
    result <SPAN class="operator token">=</SPAN> <SPAN class="string token">"There are only "</SPAN> <SPAN class="operator token">+</SPAN> cnt <SPAN class="operator token">+</SPAN> <SPAN class="string token">" observations..."</SPAN>
<SPAN class="punctuation token">}</SPAN>

<SPAN class="keyword token">return</SPAN> result<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>

XanderBakker

Just noticed that you are looking to do this in the label profile. This will not be possible since the FeatureSetBy functions that you will need are not available in the label profile.

EleanorDhuyvetter

Thank you very much for the effort with these responses, I have learned a lot with dissecting your workflow for future problems.

Is there anyway to do the first half that uses FeatureSet in ArcPro's attribute editor, then the rest in AGOL's label editor? What would need to happen for the attribute editor in arcpro to run whenever new data come in, updating the layer in AGOL and allowing the label scripts in AGOL (the last part) to run with the new and sorted data? Could I construct a model in model builder for the first part?

XanderBakker

I understand that you work for NOAA and might have access to the source data. It would be best to include in the update procedure of the data an additional field that you can use to label on, one that simply describes the change temperature. If this is stored in an actual field, you can also define you symbology on this type of data. I don't see how you would be able to do part in ArcGIS Pro and part of the expression in the label profile of Arcade (although you could have a simple expression that adds the °F to the data for display).

EleanorDhuyvetter

Sounds good, thank you for your help!

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