topic Calculating bearing between 2 GPS points in Public Transit Questions https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6643#M361 <HTML><HEAD></HEAD><BODY><P>I am trying to calculate the bearing between 2 different points - Lat1, Long1 &amp; Lat2, Long2.&nbsp; I have researched many formulas and python scripts but cannot seem to accurately determine the bearing.&nbsp; I found that ArcGIS has a Production Mapping license which contains a tool that can do the work for me, but would rather attempt other option first.&nbsp;</P><P></P><P>Is there an easier way without inquiring about another license to achieve the bearing between 2 points?</P></BODY></HTML> Wed, 27 Feb 2019 18:50:08 GMT LondonTransit 2019-02-27T18:50:08Z Calculating bearing between 2 GPS points https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6643#M361 <HTML><HEAD></HEAD><BODY><P>I am trying to calculate the bearing between 2 different points - Lat1, Long1 &amp; Lat2, Long2.&nbsp; I have researched many formulas and python scripts but cannot seem to accurately determine the bearing.&nbsp; I found that ArcGIS has a Production Mapping license which contains a tool that can do the work for me, but would rather attempt other option first.&nbsp;</P><P></P><P>Is there an easier way without inquiring about another license to achieve the bearing between 2 points?</P></BODY></HTML> Wed, 27 Feb 2019 18:50:08 GMT https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6643#M361 LondonTransit 2019-02-27T18:50:08Z Re: Calculating bearing between 2 GPS points https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6644#M362 <HTML><HEAD></HEAD><BODY><P>is Haversine not good enough?</P><P><A class="link-titled" href="https://stackoverflow.com/questions/4913349/haversine-formula-in-python-bearing-and-distance-between-two-gps-points" title="https://stackoverflow.com/questions/4913349/haversine-formula-in-python-bearing-and-distance-between-two-gps-points">Haversine Formula in Python (Bearing and Distance between two GPS points) - Stack Overflow</A>&nbsp;</P><P></P><P>I have implemented Vincenty's approximation</P><P></P><P><A class="link-titled" href="https://en.wikipedia.org/wiki/Vincenty%27s_formulae" title="https://en.wikipedia.org/wiki/Vincenty%27s_formulae">Vincenty's formulae - Wikipedia</A>&nbsp;</P><P></P><P>in Python, but it isn't suitable for field calculator calculations since it is iterative.&nbsp; It can be used in a python ide with the user providing long/lats pairs, if you are interested? (not much market for a tool to do this) or you could construct lines and calculate the bearings yourself using</P><P></P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/calculate-geometry-attributes.htm" title="https://pro.arcgis.com/en/pro-app/tool-reference/data-management/calculate-geometry-attributes.htm">Calculate Geometry Attributes—Data Management toolbox | ArcGIS Desktop</A>&nbsp;</P></BODY></HTML> Wed, 27 Feb 2019 20:29:31 GMT https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6644#M362 DanPatterson_Retired 2019-02-27T20:29:31Z Re: Calculating bearing between 2 GPS points https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6645#M363 <HTML><HEAD></HEAD><BODY><P>If you're working with python PointGeometry objects, there's a method called angleAndDistanceTo that can be used to calculate the bearing from one point to the next.</P><P></P><P><A class="link-titled" href="https://pro.arcgis.com/en/pro-app/arcpy/classes/pointgeometry.htm" title="https://pro.arcgis.com/en/pro-app/arcpy/classes/pointgeometry.htm">PointGeometry—ArcPy classes | ArcGIS Desktop</A>&nbsp;</P></BODY></HTML> Wed, 27 Feb 2019 20:40:59 GMT https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6645#M363 MelindaMorang 2019-02-27T20:40:59Z Re: Calculating bearing between 2 GPS points https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6646#M364 <HTML><HEAD></HEAD><BODY><P>Thanks for the help!&nbsp; I ended up using the Haversine Formula in Python which is calculating the proper bearing between stops.&nbsp; Now my only issue is that I need to calculate the bearing for roughly 1000 pairs of GPS points....It would be great if I could enter it into the Field Calculator, however like you said that is not possible.</P><P></P><P>Any suggestions on how to batch this process for a number of records?&nbsp;</P></BODY></HTML> Wed, 27 Feb 2019 21:39:39 GMT https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6646#M364 LondonTransit 2019-02-27T21:39:39Z Re: Calculating bearing between 2 GPS points https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6647#M365 <HTML><HEAD></HEAD><BODY><P>Vincenty is iterative, not haversine.,</P></BODY></HTML> Wed, 27 Feb 2019 22:19:38 GMT https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6647#M365 DanPatterson_Retired 2019-02-27T22:19:38Z Re: Calculating bearing between 2 GPS points https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6648#M366 <HTML><HEAD></HEAD><BODY><P>Maybe you can cobble up something with this</P><P></P><P><A class="link-titled" href="https://gist.github.com/Dan-Patterson/137a5492080b9bd914dcaa0656ccdb77" title="https://gist.github.com/Dan-Patterson/137a5492080b9bd914dcaa0656ccdb77">vincenty.py · GitHub</A>&nbsp;</P><P></P><P>It was actually way faster than doing geodesic calculations using arcpy pointgeometry objects</P></BODY></HTML> Fri, 01 Mar 2019 02:30:54 GMT https://community.esri.com/t5/public-transit-questions/calculating-bearing-between-2-gps-points/m-p/6648#M366 DanPatterson_Retired 2019-03-01T02:30:54Z