[R-sig-Geo] Delimit a polygon for the region which is> 1000 m from my raster altitude

[sadaoui]

*Hello,
I am new to this forum

My goal is to define a polygon for the region> 1000 m from raster of
altitude
  then export to shapefile.

I tried with this code:

#import the raster: (attachment)

library (raster)
map <- raster ("Adige.tif")

#Delimit the area (> 1000 m) with the "contour"


contour (map, add = T, levels = c (1000))


but I can not export the contour to shapefile

thank you in advance for helping me

sadaoui*



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