Override the time format

[lorenh]

I would like to override the time format written out in the GPX to optionally include fractional seconds.

NetTopologySuite.IO.GPX currently writes out this:

<trkpt lat="49.632506" lon="-94.067506">
  <time>2017-10-11T13:34:27Z</time>
</trkpt>

And we would like it to be this:

<trkpt lat="49.632506" lon="-94.067506">
  <time>2017-10-11T13:34:27.603Z</time>
</trkpt>

In Helpers.cs I see a hard-coded string format. Any way to override this?

        public static void WriteOptionalGpxElementValue(this XmlWriter writer, string localName, DateTime? valueUtc, TimeZoneInfo timeZoneInfo)
        {
            if (valueUtc.HasValue)
            {
                const string Format = "yyyy-MM-ddTHH:mm:ssK";

[lorenh]

I did a PR of one simple way you could do this:

#32

[airbreather]

optionally include fractional seconds.

Starting in 0.5.0, timestamps are now always written out with fractional seconds, if present*. If there are cases where you don't want fractional seconds, then please do one of the following:

• Use an input file that does not have any fractional seconds,
• Round the timestamps in-memory (.WithTimestampUtc / .WithCreationTimeUtc)
• Open a separate GitHub issue asking for the ability to opt-out. I'll gladly do this if this is something that's actually needed, but my guess is that 0.5.0 is good enough.

Thanks for the report!

*up the precision that DateTime stores internally, which is 100ns... this is not likely to change

[lorenh]

Thanks for addressing so quickly. The best solution is one that "just works" for a majority of users.