https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052293#M5981 <P>You need an array of Point objects</P><P>See the code example in this link</P><P><A href="https://pro.arcgis.com/en/pro-app/latest/arcpy/classes/polyline.htm" target="_blank">Polyline—ArcGIS Pro | Documentation</A></P><P>&nbsp;</P> Wed, 28 Apr 2021 14:53:19 GMT DanPatterson 2021-04-28T14:53:19Z https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052275#M5980 <P>How get Polyline length?</P><P>5275638.50297307 5308417.691663428<BR />5275634.752936599 5308476.037372201<BR />5275634.184976945 5308515.710878163<BR />5275617.412332638 5308509.338851113<BR />5275597.092486764 5308511.743163031<BR />5275580.186472058 5308514.360920422<BR />5275533.894758095 5308520.283088091<BR />5275534.214086481 5308529.217629748<BR />5275504.951189122 5308533.458738968<BR />5275485.222822129 5308534.248161392<BR />5275458.805185116 5308535.972561657</P><P>i try this code, but its show error</P><P>polyline = arcpy.Polyline(array)<BR />polyline.getLength()</P><P>&nbsp;</P><P>Traceback (most recent call last):<BR />File "&lt;string&gt;", line 1, in &lt;module&gt;<BR />File "C:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\arcobjects\arcobjects.py", line 1561, in getLength<BR />return convertArcObjectToPythonObject(self._arc_object.GetLength(*gp_fixargs((method, units))))<BR />ValueError: Опция GEODESIC не может быть использована с геометрией неизвестной системы координат.</P> Wed, 28 Apr 2021 14:33:44 GMT https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052275#M5980 Radzhabad 2021-04-28T14:33:44Z https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052293#M5981 <P>You need an array of Point objects</P><P>See the code example in this link</P><P><A href="https://pro.arcgis.com/en/pro-app/latest/arcpy/classes/polyline.htm" target="_blank">Polyline—ArcGIS Pro | Documentation</A></P><P>&nbsp;</P> Wed, 28 Apr 2021 14:53:19 GMT https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052293#M5981 DanPatterson 2021-04-28T14:53:19Z https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052294#M5982 <P>Perhaps polyline.getLength('PLANAR', 'METERS') or&nbsp;polyline.getLength('GEODESIC', 'METERS') etc.</P> Wed, 28 Apr 2021 14:54:01 GMT https://community.esri.com/t5/arcgis-api-for-python-questions/how-get-polyline-length-with-arcpy/m-p/1052294#M5982 DavidPike 2021-04-28T14:54:01Z