[R] Errors in Raster to Point

[David Remotti]

First answer is that R is not the proper environment for such a 
question. There a re many free package for image analysis or even GIS. 
Try for example Q-GIS

David


Il 19/09/2016 22:34, GwanSeon Kim ha scritto:
> Hi, all
> I am just beginner to use R.
> I am working with TIF image file, and the information about the raster is
> following:
>
> class       : RasterLayer
> dimensions  : 11150, 21808, 243159200  (nrow, ncol, ncell)
> resolution  : 30, 30  (x, y)
> extent      : 569685, 1223925, 1513995, 1848495  (xmin, xmax, ymin, ymax)
> coord. ref. : +proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0
> +y_0=0 +datum=NAD83 +units=m +no_defs +ellps=GRS80 +towgs84=0,0,0
> data source :
> C:\Users\Gwan\AppData\Local\Temp\Rtmpg506Ee\raster\r_tmp_2016-09-14_122409_6260_09589.grd
> names       : test_map
> values      : 1, 225  (min, max)
> attributes  :
>         ID OBJECTID Value Red Green Blue   Count               Class_Name
> Opacity
>   from:  0        2     1   1     0    0 5982503                     Corn
>      1
>   to  : 48      255   254   0     0    0   10336 Dbl Crop Barley/Soybeans
>      1
>
>
>
> >From this Rasterlayer, I want to convert raster to point for each pixel
> based on "Value (one of column name)" and create a raster with
> georeferenced information.
> I used code as following: RP <- rasterToPoints(KY_raster)
> However, I could not get the points and have an error message "cannot
> allocate vector of size 5.4 Gb" and "Your computer is low on memory. Save
> your files and close these programs".
> Could someone please help me how I can convert to raster to points??
> Best,
>
> 	[[alternative HTML version deleted]]
>
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