How can i use a python script to join points to form polylines

Question

How can i use a python script to join points to form polylines i.e 4 points to form 4 polylines, i believe it would be an array but i need your suggestions. Thanks

T__WayneWhitley · Answer

Thanks, what i want is to be able to join point features to form a polyline 2 points each for a polyline segment.

Instead of SHAPE@, may have to use the SHAPE@XY token to return the tuple to construct the point objects needed for loading the array, whichever works best....I'd like to test this later.

T__WayneWhitley · Answer

I don't know your specifics such as what ArcGIS version you are using, how comfortable you are already w/ Python cursor and geometry access, or how your point data is housed.  I'll just jump in referring you to some sample code from the web help, which is a classic script adaptation using a 'coordinate text file':

Writing Geometries
http://resources.arcgis.com/en/help/main/10.1/index.html#/Writing_geometries/002z0000001v000000/

Just a couple of comments:
- The sample I refer to is the last sample on the page and begins with the comment, "Create a new line feature class using a text file of coordinates."
- In the actual code, the coords are already fed into a hard-coded python list...no text file, although it's easy to 'see' the mechanism opening/reading/loading from txt.
- 10.1 uses a new da module to enhance performance of cursors?  (I'm still at 10.0)
- If you're reading directly from points instead of the coord file, you'll need to read the geom via a search cursor, feed the points you want to form the polyline into the array object, and in turn feed the array into the insert cursor (you'll need the 'shape@' token).  Also, since not 'constructing' point geometry with the point object, I think simply 'transferring' geometry will involve directly reading/loading point geoms from the search cursor row object with shape@ token into the array.

Then, it seems you'll also need the previous web help topic:
http://resources.arcgis.com/en/help/main/10.1/index.html#/Reading_geometries/002z0000001t000000/

OLANIYANOLAKUNLE · Answer

Thanks, what i want is to be able to join point features to form a polyline 2 points each for a polyline segment.