Hi,
Very new to spatial R. I'm trying to find the best way to build a sf dataframe
of random points inside an extent. I built a matrix of random coordinates and
now I try to convert this matrix to a vector of st_point.
I was expecting that something like:
PTS <- matrix(seq(1,6), 3, 2)
ptsdf <-
iginal Message-
> From: r-sig-geo-boun...@r-project.org [mailto:r-sig-geo-bounces@r-
> project.org] On Behalf Of Pierre Racine
> Sent: Tuesday, July 12, 2011 4:29 PM
> To: r-sig-geo@r-project.org
> Subject: [R-sig-Geo] How to see polygons vertex
>
> Hi,
>
Hi,
I want to see all the vertex of a SpatialPolygonsDataFrame in a plot. Should I
convert or extract the coordinates of each polygons and then plot them? How?
Thanks,
Pierre
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Ok I passed "SG=image1" to initGRASS() and now I get the full extent of the
image back.
Thanks Roger
>-Original Message-
>From: Roger Bivand [mailto:roger.biv...@nhh.no]
>Sent: 28 janvier 2011 14:59
>To: Pierre Racine
>Cc: r-sig-geo
>Subject: Re: [R-sig
Hi,
It seems I'm having problem storing a raster into GRASS using the spgrass6
package. I writeRAST6() a 1376x1376 raster to GRASS, but when I readRAST6() it
back to R the raster is only 1x1 pixels... Note that the raster is a bmp and
hence is not projected to any coordinate system.
I must be
I see functions to rasterize in the raster package but nothing to vectorize...
and certainly nothing to do buffer around polygons.
Pierre
From: romu...@gmail.com [mailto:romu...@gmail.com] On Behalf Of Roman Lu¹trik
Sent: 25 janvier 2011 14:27
To: Pierre Racine
Cc: r-sig-geo
Subject: Re: [R-sig
Hi list,
I trying to find how to do two operations in R:
1-Convert (vectorize) a raster to polygons
2-Make buffers around a set of polygons
Thanks for your help,
Pierre
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