distances in export are written in exponential notation instead of regular notation

[serviax]

Hi,

When creating an export of shapes there is an optional field called shape_dist_traveled, this field does not allow exponential notation, however by default this library does use exponential notation when the value is rather small (default behaviour of .Net)

Can this be changed so that it does never use exponentation notation?
Hint : the location where this occurs is in GTFSWriter.cs in method Write(IGTFSTargetFile file, IEnumerable entities) on the following line :
data[4] = this.WriteFieldDouble("shapes", "shape_dist_traveled", entity.DistanceTravelled);

hereunder is the warning stated that you will get when exporting data with this library and validating it with the feed validator from google :

Invalid numeric value 9.49307305463114E-05. Please ensure that the number includes an explicit whole number portion (ie. use 0.5 instead of .5), that you do not use the exponential notation (ie. use 0.001 instead of 1E-3), and that it is a properly formated decimal value.
in line 7 of shapes.txt

[xivk]

Thanks for checking and reporting 👍 will have a look first thing next time I work on this. Should not take too long to fix.

[serviax]

great!
By the way I expect that the same issue occurs with any other value that can be a double ( latitude, longitude, distance, .... )

[xivk]

Ah, ok, thanks... will check the spec again first before fixing.

[rorlic]

I have a fix ready. See my fork.
I took precision 1E-9. Tune it as you see fit.