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Converting geometry($feature) coordinates in a pop-up to decimal degrees?

DenaS

In arc gis online, I have a point feature map. When I create a new feature, I would like it to calculate the latitude and longitude in decimal degrees.

Right now, I am using the following code in the Arcade, but the coordinates are in the wrong format for my uses.

var geom = Geometry($feature);
return "(" + Round(geom.x, 3) + ", " + Round(geom.y, 3) + ")";

example of the returned data: (-17583389.106, 2474881.059)

What is the right expression for obtaining decimal degrees instead of what is provided above?

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Accepted answers

XanderBakker

Hi Dena S ,

You can do this and that would simplify the expression to something like this:

<SPAN class="keyword token">function</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN>x<SPAN class="punctuation token">,</SPAN> y<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// Converts XY point from Spherical Mercator EPSG:900913 to lat/lon in WGS84 Datum</SPAN>
     <SPAN class="comment token">// Source: http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/</SPAN>
    <SPAN class="keyword token">var</SPAN> originShift <SPAN class="operator token">=</SPAN> <SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="number token">6378137.0</SPAN> <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lon <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>x <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lat <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>y <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    lat <SPAN class="operator token">=</SPAN> <SPAN class="number token">180.0</SPAN> <SPAN class="operator token">/</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="token function">Atan</SPAN><SPAN class="punctuation token">(</SPAN> <SPAN class="token function">Exp</SPAN><SPAN class="punctuation token">(</SPAN> lat <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">-</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="punctuation token">[</SPAN>lat<SPAN class="punctuation token">,</SPAN> lon<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

<SPAN class="comment token">// use functions to get the desired output </SPAN>
<SPAN class="keyword token">var</SPAN> latlon <SPAN class="operator token">=</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> <SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">return</SPAN> <SPAN class="token function">Round</SPAN><SPAN class="punctuation token">(</SPAN>latlon<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">6</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> <SPAN class="token function">Round</SPAN><SPAN class="punctuation token">(</SPAN>latlon<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">6</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>

All comments

KaraUtter

@XanderBakker I need the decimal degrees to appear like they do in your script, but when I copied and pasted it into my arcade expression builder in Map Viewer, it returns the following error that I don't understand:

XanderBakker

Hi Dena S ,

You can do this and that would simplify the expression to something like this:

<SPAN class="keyword token">function</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN>x<SPAN class="punctuation token">,</SPAN> y<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// Converts XY point from Spherical Mercator EPSG:900913 to lat/lon in WGS84 Datum</SPAN>
     <SPAN class="comment token">// Source: http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/</SPAN>
    <SPAN class="keyword token">var</SPAN> originShift <SPAN class="operator token">=</SPAN> <SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="number token">6378137.0</SPAN> <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lon <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>x <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lat <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>y <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    lat <SPAN class="operator token">=</SPAN> <SPAN class="number token">180.0</SPAN> <SPAN class="operator token">/</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="token function">Atan</SPAN><SPAN class="punctuation token">(</SPAN> <SPAN class="token function">Exp</SPAN><SPAN class="punctuation token">(</SPAN> lat <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">-</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="punctuation token">[</SPAN>lat<SPAN class="punctuation token">,</SPAN> lon<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

<SPAN class="comment token">// use functions to get the desired output </SPAN>
<SPAN class="keyword token">var</SPAN> latlon <SPAN class="operator token">=</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> <SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">return</SPAN> <SPAN class="token function">Round</SPAN><SPAN class="punctuation token">(</SPAN>latlon<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">6</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> <SPAN class="token function">Round</SPAN><SPAN class="punctuation token">(</SPAN>latlon<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">6</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>

DenaS

Thank you Xander Bakker‌!

This definitely worked.

How do I keep the coordinates in decimal degrees (21.69046, -157.962533) instead of converting to DMS (21°41'53.0"N 157°57'45.1"W)

Finally, is there documentation that describes the code that you used in the above expression, so that I can have a better understanding of how it works?

Many thanks!

XanderBakker

Hi Dena S ,

I assume that the coordinates are in Web Mercator Auxiliary Sphere,which is the default coordinate system in ArcGIS Online. Does the location correspond to the Northern part of O'ahu?

If so, you can use the expression below to obtain a multiline text string containing the coordinates.First go into configuration of your pop-up. The scroll down to where you can define your Arcade expressions and add a new expression. Copy and paste the code below:

<SPAN class="keyword token">function</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN>x<SPAN class="punctuation token">,</SPAN> y<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// Converts XY point from Spherical Mercator EPSG:900913 to lat/lon in WGS84 Datum</SPAN>
     <SPAN class="comment token">// Source: http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/</SPAN>
    <SPAN class="keyword token">var</SPAN> originShift <SPAN class="operator token">=</SPAN> <SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="number token">6378137.0</SPAN> <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lon <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>x <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lat <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>y <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    lat <SPAN class="operator token">=</SPAN> <SPAN class="number token">180.0</SPAN> <SPAN class="operator token">/</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="token function">Atan</SPAN><SPAN class="punctuation token">(</SPAN> <SPAN class="token function">Exp</SPAN><SPAN class="punctuation token">(</SPAN> lat <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">-</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="punctuation token">[</SPAN>lat<SPAN class="punctuation token">,</SPAN> lon<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

Function <SPAN class="token function">LON_g_m_s</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// convert decimal degrees longitud to DMS</SPAN>
    <SPAN class="keyword token">var</SPAN> grados <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>decimal_degrees <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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'W'</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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'E'</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    <SPAN class="keyword token">var</SPAN> min_seg <SPAN class="operator token">=</SPAN> <SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> grados <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> minutos <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN>min_seg<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> segundos <SPAN class="operator token">=</SPAN> min_seg <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> minutos <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> gms <SPAN class="operator token">=</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>grados<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"###"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN>  <SPAN class="string token">"° "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>minutos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"' "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>segundos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00.000"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">'" '</SPAN> <SPAN class="operator token">+</SPAN> quad<SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> gms<SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

Function <SPAN class="token function">LAT_g_m_s</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// convert decimal degrees latitud to DMS</SPAN>
    <SPAN class="keyword token">var</SPAN> grados <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>decimal_degrees<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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'S'</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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'N'</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    <SPAN class="keyword token">var</SPAN> min_seg <SPAN class="operator token">=</SPAN> <SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> grados <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> minutos <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN>min_seg<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> segundos <SPAN class="operator token">=</SPAN> min_seg <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> minutos <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> gms <SPAN class="operator token">=</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>grados<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"###"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN>  <SPAN class="string token">"° "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>minutos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"' "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>segundos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00.000"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">'" '</SPAN> <SPAN class="operator token">+</SPAN> quad<SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> gms<SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>

<SPAN class="comment token">// use functions to get the desired output </SPAN>
<SPAN class="keyword token">var</SPAN> latlon <SPAN class="operator token">=</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> <SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>Y<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> dms_lat <SPAN class="operator token">=</SPAN> <SPAN class="token function">LAT_g_m_s</SPAN><SPAN class="punctuation token">(</SPAN>latlon<SPAN class="punctuation token">[</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="keyword token">var</SPAN> dms_lon <SPAN class="operator token">=</SPAN> <SPAN class="token function">LON_g_m_s</SPAN><SPAN class="punctuation token">(</SPAN>latlon<SPAN class="punctuation token">[</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>

<SPAN class="keyword token">return</SPAN> dms_lat <SPAN class="operator token">+</SPAN> TextFormatting<SPAN class="punctuation token">.</SPAN>NewLine <SPAN class="operator token">+</SPAN> dms_lon<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>

And test the expression (it should look something like this):

Close the window and make sure that the expression is included in your attributes that will be shown in the pop-up (this is default behavior). In my case the result looks like this:

DenaS

Thanks for the quick reply. I just started my first web map, how do I know what projection it is in?

Can you provide a little more guidance on how to apply this code? I added the first example into an attribute expression and saved it. This added a new field to my popup but without any associated coordinates. Thanks for the clarification!

XanderBakker

Hi denars ,

I assume that you have Web Mercator Auxiliary Sphere coordinates in your web map and those should first be converted to WGS1984. An example how to do this:

<SPAN class="keyword token">function</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN>x<SPAN class="punctuation token">,</SPAN> y<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="comment token">// Converts XY point from Spherical Mercator EPSG:900913 to lat/lon in WGS84 Datum</SPAN>
     <SPAN class="comment token">// Fuente: http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/</SPAN>
    <SPAN class="keyword token">var</SPAN> originShift <SPAN class="operator token">=</SPAN> <SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="number token">6378137.0</SPAN> <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">;</SPAN>

    <SPAN class="keyword token">var</SPAN> lon <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>x <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> lat <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">(</SPAN>y <SPAN class="operator token">/</SPAN> originShift<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">;</SPAN>

    lat <SPAN class="operator token">=</SPAN> <SPAN class="number token">180.0</SPAN> <SPAN class="operator token">/</SPAN> PI <SPAN class="operator token">*</SPAN> <SPAN class="punctuation token">(</SPAN><SPAN class="number token">2.0</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="token function">Atan</SPAN><SPAN class="punctuation token">(</SPAN> <SPAN class="token function">Exp</SPAN><SPAN class="punctuation token">(</SPAN> lat <SPAN class="operator token">*</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">180.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">-</SPAN> PI <SPAN class="operator token">/</SPAN> <SPAN class="number token">2.0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> <SPAN class="punctuation token">[</SPAN>lat<SPAN class="punctuation token">,</SPAN> lon<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">;</SPAN>
<SPAN class="punctuation token">}</SPAN>


<SPAN class="keyword token">var</SPAN> latlon <SPAN class="operator token">=</SPAN> <SPAN class="token function">MetersToLatLon</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>X<SPAN class="punctuation token">,</SPAN> <SPAN class="token function">Geometry</SPAN><SPAN class="punctuation token">(</SPAN>$feature<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>Y<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>

This will return lat and lon as decimal degrees. You can change the visualization by some more Arcade, like this:

Function <SPAN class="token function">LON_g_m_s</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">var</SPAN> grados <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>decimal_degrees <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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'W'</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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'E'</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    <SPAN class="keyword token">var</SPAN> min_seg <SPAN class="operator token">=</SPAN> <SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> grados <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> minutos <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN>min_seg<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> segundos <SPAN class="operator token">=</SPAN> min_seg <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> minutos <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> gms <SPAN class="operator token">=</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>grados<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"###"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN>  <SPAN class="string token">"° "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>minutos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"' "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>segundos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00.000"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">'" '</SPAN> <SPAN class="operator token">+</SPAN> quad<SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> gms<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>

and

Function <SPAN class="token function">LAT_g_m_s</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="punctuation token">{</SPAN>
    <SPAN class="keyword token">var</SPAN> grados <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">if</SPAN> <SPAN class="punctuation token">(</SPAN>decimal_degrees<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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'S'</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">var</SPAN> quad <SPAN class="operator token">=</SPAN> <SPAN class="string token">'N'</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="punctuation token">}</SPAN>
    <SPAN class="keyword token">var</SPAN> min_seg <SPAN class="operator token">=</SPAN> <SPAN class="token function">Abs</SPAN><SPAN class="punctuation token">(</SPAN>decimal_degrees<SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> grados <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> minutos <SPAN class="operator token">=</SPAN> <SPAN class="token function">Floor</SPAN><SPAN class="punctuation token">(</SPAN>min_seg<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> segundos <SPAN class="operator token">=</SPAN> min_seg <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN> <SPAN class="operator token">-</SPAN> minutos <SPAN class="operator token">*</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">var</SPAN> gms <SPAN class="operator token">=</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>grados<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"###"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN>  <SPAN class="string token">"° "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>minutos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"' "</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="token function">Text</SPAN><SPAN class="punctuation token">(</SPAN>segundos<SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"00.000"</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">'" '</SPAN> <SPAN class="operator token">+</SPAN> quad<SPAN class="punctuation token">;</SPAN>
    <SPAN class="keyword token">return</SPAN> gms<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>

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