Jonty / googletransitdatafeed

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Merge Warnings - Stops.txt #357

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago
What steps will reproduce the problem?
1. run merge tool to merge two separate feeds
2.
3.

What is the expected output? What do you see instead?
Expect the merge to run successfully but receive warnings:
 1) there are stops from the old feed and the new feed that could not be merged because the stop names did not match. 
 2) There are stops in the old feed and new feed with the same id but they could not be merged because they are too far apart.

Our transit agency relocates, eliminates, and add bus stops in coordination 
with each schedule change based on request or consolidation studies. 

It would be helpful if these changes would be reflected in the merged feed 
instead of being dropped all together. 

What version of the product are you using? On what operating system?
1.2.12
Windows XP Professional

Please provide any additional information below.

Original issue reported on code.google.com by herbert....@gmail.com on 30 Jan 2013 at 4:46

GoogleCodeExporter commented 9 years ago
I think I know how this works...please correct me if I'm wrong - 

The stops aren't dropped - they just aren't merged together, so there are two 
records for the stop in your merged feed instead of one. One of the records 
applies to the old schedule and one applies to the new schedule.  For most 
agencies, a customer will never notice the difference. But the merge tool will 
change the stop_id throughout all the files in the feed (I think it appends _a 
and _b to the stop_id). So if you have external systems that reference these 
stop_ids, I don't recommend letting the merge tool change them.

You have a couple options here if you want to just have one record and keep the 
stop_id the same.

1) Go into the old feed and change the stops.txt values to match the new 
version (location and name). Unless you are moving the stop on a certain date, 
the stop has probably already been moved/changed and this would make your feed 
more accurate.

2) When you are running the merge tool, if only the location has changed and 
not the name, you can add the --largest_stop_distance flag and give it a large 
value so that the stops will be merged no matter how far apart they are.

Original comment by devin.br...@gmail.com on 30 Jan 2013 at 5:06

GoogleCodeExporter commented 9 years ago

Original comment by bdfer...@google.com on 26 Sep 2014 at 4:51

GoogleCodeExporter commented 9 years ago
Moved to https://github.com/google/transitfeed/issues/357

Original comment by bdfer...@google.com on 7 Oct 2014 at 7:42