nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Calculate Geometry - Degrees Minutes (DDD MM.mmm' [N│S])

JaredDoke1

In ArcMap, you could use Calculate Geometry to easily calculate the lat and long of points in an already existing field using one of several different formats that you specify. In ArcGIS Pro, that feature has been removed. Is there a way to easily calculate the latitude and longitude of points in an already existing field in Degrees Minutes (DDD MM.mmm' [N│S]?

Find more posts tagged with

Accepted answers

All comments

DanPatterson_Retired

some funcs here https://stackoverflow.com/questions/2579535/how-to-convert-dd-to-dms-in-python

You could put something together perhaps along the lines of...

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">dd_dmm</SPAN><SPAN class="punctuation token">(</SPAN>dd<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""decimal degrees to deg dec min"""</SPAN>
&nbsp;&nbsp;&nbsp; deg <SPAN class="operator token">=</SPAN> int<SPAN class="punctuation token">(</SPAN>dd<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; minsec <SPAN class="operator token">=</SPAN> divmod<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>deg <SPAN class="operator token">-</SPAN> dd<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">*</SPAN><SPAN class="number token">60</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; frmt <SPAN class="operator token">=</SPAN> <SPAN class="string token">"{} {:0.2f}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>deg<SPAN class="punctuation token">,</SPAN> minsec<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> deg<SPAN class="punctuation token">,</SPAN> minsec<SPAN class="punctuation token">,</SPAN> frmt

<SPAN class="comment token"># ---- remove what you don't want from the 'return' statement</SPAN>

a <SPAN class="operator token">=</SPAN> <SPAN class="operator token">-</SPAN><SPAN class="number token">75.55</SPAN>

dd_dmm<SPAN class="punctuation token">(</SPAN>a<SPAN class="punctuation token">)</SPAN>

<SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">75</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">32.99999999999983</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'-75 33.00'</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>

DanPatterson_Retired

Or this...

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">dd_dmm</SPAN><SPAN class="punctuation token">(</SPAN>dd<SPAN class="punctuation token">,</SPAN> cal_long<SPAN class="operator token">=</SPAN><SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""decimal degrees to deg dec min"""</SPAN>
&nbsp;&nbsp;&nbsp; deg <SPAN class="operator token">=</SPAN> int<SPAN class="punctuation token">(</SPAN>dd<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> deg <SPAN class="operator token"><</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; quad <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'S'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'W'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN>cal_long<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; deg <SPAN class="operator token">=</SPAN> abs<SPAN class="punctuation token">(</SPAN>deg<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; quad <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'N'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'E'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN>cal_long<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; minsec <SPAN class="operator token">=</SPAN> divmod<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>deg <SPAN class="operator token">-</SPAN> dd<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">*</SPAN><SPAN class="number token">60</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; frmt <SPAN class="operator token">=</SPAN> <SPAN class="string token">"{} {:0.2f} {}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>deg<SPAN class="punctuation token">,</SPAN> minsec<SPAN class="punctuation token">,</SPAN> quad<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> frmt

dd_dmm<SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">45.5</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; <SPAN class="comment token"># '45 30.00 W'</SPAN>
dd_dmm<SPAN class="punctuation token">(</SPAN><SPAN class="number token">45.5</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp;&nbsp; <SPAN class="comment token"># '45 30.00 E'</SPAN>
dd_dmm<SPAN class="punctuation token">(</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">45.5</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">)</SPAN> <SPAN class="comment token"># '45 30.00 S'</SPAN>
dd_dmm<SPAN class="punctuation token">(</SPAN><SPAN class="number token">45.5</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="token boolean">False</SPAN><SPAN class="punctuation token">)</SPAN>&nbsp; <SPAN class="comment token"># '45 30.00 N'‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍</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>

Or with degree symbol

<SPAN class="keyword token">def</SPAN> <SPAN class="token function">dd_dmm</SPAN><SPAN class="punctuation token">(</SPAN>dd<SPAN class="punctuation token">,</SPAN> cal_long<SPAN class="operator token">=</SPAN><SPAN class="token boolean">True</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="string token">"""decimal degrees to deg dec min"""</SPAN>
&nbsp;&nbsp;&nbsp; deg_sign <SPAN class="operator token">=</SPAN> u<SPAN class="string token">'\N{DEGREE SIGN}'</SPAN>
&nbsp;&nbsp;&nbsp; deg <SPAN class="operator token">=</SPAN> int<SPAN class="punctuation token">(</SPAN>dd<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">if</SPAN> deg <SPAN class="operator token"><</SPAN> <SPAN class="number token">0</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; quad <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'S'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'W'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN>cal_long<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; deg <SPAN class="operator token">=</SPAN> abs<SPAN class="punctuation token">(</SPAN>deg<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">else</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; quad <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="string token">'N'</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">'E'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN>cal_long<SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; minsec <SPAN class="operator token">=</SPAN> divmod<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">(</SPAN>deg <SPAN class="operator token">-</SPAN> dd<SPAN class="punctuation token">)</SPAN><SPAN class="operator token">*</SPAN><SPAN class="number token">60</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="number token">60</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="operator token">-</SPAN><SPAN class="number token">1</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp;&nbsp; frmt <SPAN class="operator token">=</SPAN> <SPAN class="string token">"{}{} {:0.2f}' {}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>deg<SPAN class="punctuation token">,</SPAN> deg_sign<SPAN class="punctuation token">,</SPAN> minsec<SPAN class="punctuation token">,</SPAN> quad<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">return</SPAN> frmt

<SPAN class="comment token">#&nbsp; "45° 30.00' W"</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>

JaredDoke1

Thank you Dan! This is exactly what I was looking for. I modified the third example a little to be dd_dmm(!shape.centroid.x!, cal_long=True) so that I didn't have to calculate the decimal degrees in the first place. Thanks.

DanPatterson_Retired

cal_long is whether you want to calculate longitude if True and if False it uses latitude ... ie the E/W and N/S designation. The incarnations assume that you wanted Longitude and Latitude in separate fields, but... modify away to suit

KoryKramer

Jared, you might also want to jump over to the ideas site to up vote and comment on https://community.esri.com/ideas/10695‌ Notice that it's status in In Product Plan.

Cheers

DanPatterson_Retired

barely keeping ahead of you guys Kory...

Join the Conversation

Signed in members can post, follow updates, and more. New here? Register a free account.

Quick Links

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.