Dear list members.

I am trying to project a SpatialPointsDataFrame but I got an error, do you
know why?:

> avTT = subset(avist, especie == "Tursiops truncatus")
> class(avTT)
[1] "data.frame"

> coordinates(avTT) = ~long+lat
> class(avTT)
[1] "SpatialPointsDataFrame"
attr(,"package")
[1] "sp"

> proy = CRS("+proj=tmerc +lon_0=-84 +lat_0=0 +x_0=500000 +k=0.9999
+datum=WGS84")
> avTTproy = spTransform(avTT, CRS=proy)
Error en spTransform(xSP, CRSobj) :
  No transformation possible from NA reference system

Best,

Manuel

-- 
*Manuel Spínola, Ph.D.*
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola@una.ac.cr
mspinola10@gmail.com
Teléfono: (506) 2277-3598
Fax: (506) 2237-7036
Personal website: Lobito de río <https://sites.google.com/site/lobitoderio/>
Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>

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