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I am trying to reproject a shapefile. For example, the land shapefile from Natural Earth.

library(sf)
shape <- read_sf(".../ne_10m_land.shp")

shape_proj<-spTransform(shape, CRS("+proj=gnom +lat_0=90 +lon_0=-50"))

I keep getting the following error, even when I try with CRSobj= or using other ways to express the CRS.

Error in (function (classes, fdef, mtable) : unable to find an inherited method for function ‘spTransform’ for signature ‘"sf", "CRS"’

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  • 5
    You're mixing two generations of vector features packages. spTranform is for sp objects (the 'old' way). For sf objects you must use st_transform Jan 2, 2019 at 22:36

2 Answers 2

9

check the data type,

class(shape)

if it returns sf "data.frame" you should use st_transform instead of spTransform

shape_proj<-st_transform(shape, CRS("+proj=gnom +lat_0=90 +lon_0=-50"))
1

Try to use this function instead: st_transform(shape,st_crs(shape2)) #that's if you want your CRS to match another coordinate system (shape2 in this case)

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