st_write and gpx file

I tried already... it did not work either ?Message envoy? de mon t?l?phone mobile. Merci d'excuser les ?ventuelles erreurs de frappe.
-------- Message d'origine --------De : Ahmadou Dicko <dicko.ahmadou at gmail.com> Date : 05/03/2022  20:24  (GMT+01:00) ? : Patrick Giraudoux <patrick.giraudoux at univ-fcomte.fr> Cc : r-sig-geo at r-project.org Objet : Re: [R-sig-Geo] st_write and gpx file Hi Patrick,You can add the driver manually.st_write(walk, dsn = "walk.gpx", layer = "track_points", driver = "GPX")Hope it helps,AhmadouOn Sat, Mar 5, 2022 at 6:53 PM Patrick Giraudoux <patrick.giraudoux at univ-fcomte.fr> wrote:Dear listers,

I am making trials with the sf package trying to write point geometries 
into afile. Here is the sf object:

walk? Simple feature collection with 2095 features and 2 fields Geometry 

type: POINT Dimension: XY Bounding box: xmin: 5.951268 ymin: 47.29238 
xmax: 5.974512 ymax: 47.3015 Geodetic CRS: WGS 84 First 10 features: 
track_seg_point_id ele geometry 1 0 243 POINT (5.95348 47.29709) 2 1 243 
POINT (5.953438 47.29704) 3 2 244 POINT (5.953219 47.29702) 4 3 243 
POINT (5.952884 47.29713) 5 4 243 POINT (5.952492 47.2972) 6 5 243 POINT 
(5.952335 47.29743) 7 6 242 POINT (5.951881 47.29732) 8 7 242 POINT 
(5.951495 47.29724) 9 8 293 POINT (5.951333 47.29719) 10 9 294 POINT 
(5.951388 47.29706)

Writing a shapefile as well as a kml is no problem:

st_write(walk,"walk.shp")

st_write(walk,"walk.kml")

But I cannot go through writing a gpx file, e.g.

st_write(walk,dsn="walk.gpx",layer="track_points")? Error: Could not guess driver for walk.gpx

I have tried several other combinations all unsuccessful.

Have someone an idea about what goes wrong ?

Best,

Patrick





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