El 10/02/2023 a las 15:13, Roger Bivand escribió:
On Fri, 10 Feb 2023, Marcelino de la Cruz Rot wrote:
It depends on what you mean by "overimpose".
Maybe this way?
# some spatial polygon
Please, in the spirit of the evolving r-spatial package ecosystem
(maptools will retire during 2023):
library(sf)
R <- st_as_sf(affine(letterR, mat=diag(c(20,20))))
plot(R, border="blue")
See https://r-spatial.org/r/2022/12/14/evolution2.html, maybe
https://rsbivand.github.io/csds_jan23/bivand_csds_ssg_230117.pdf and
https://www.youtube.com/watch?v=TlpjIqTPMCA&list=PLzREt6r1NenmWEidssmLm-VO_YmAh4pq9&index=1
Roger
Thank you Roger!
In the spirit of the evolving, I then suggest this to Manuel:
# define this function (if it is not in your version of sf)
st_as_sf.tess <- sf:::st_as_sf.owin
# transform tesselations in sf's
Dsf <- st_as_sf(D)
Csf <- st_as_sf(C)
Bsf <- st_as_sf(B)
Asf <- st_as_sf(A)
# crop tesselations with spatial polygon
RDsf <- Dsf[R,]
RCsf <- Csf[R,]
RBsf <- Bsf[R,]
RAsf <- Asf[R,]
#overimpose cropped grids
plot(RAsf)
plot(RDsf, border="green", add=T)
plot(RCsf, border="blue", add=T)
plot(RBsf, border="red", add=T)
plot(RAsf, add=T)
Cheers,
Marcelino
library(maptools)
R <- as(affine(letterR, mat=diag(c(20,20))), "SpatialPolygons")
plot(R, border="blue")
# "overimpose" grids A to C on R:
plot(C, border="green", add=T)
plot(B, border="red", add=T)
plot(A, add=T)
Cheers,
Marcelino
El 10/02/2023 a las 13:29, Manuel Spínola escribió:
Thank you very much Marcelino.
And how can overimpose those grids to a spatial polygon?
Manuel
On Fri, 10 Feb 2023 at 03:09 Marcelino de la Cruz Rot
<marcelino.delac...@urjc.es> wrote:
Dear Manuel,
This is R. There is no "it is possible". Only "how" ;-).
For example, with spatstat.geom,
A <- tess(xgrid=seq(0,80, by=8),ygrid=seq(0,80, by=8))
B <- tess(xgrid=seq(0,80, by=4),ygrid=seq(0,80, by=4))
C <- tess(xgrid=seq(0,80, by=2),ygrid=seq(0,80, by=2))
D <- tess(xgrid=seq(0,80, by=1),ygrid=seq(0,80, by=1))
Cheers,
Marcelino
El 10/02/2023 a las 0:21, Manuel Spínola escribió:
> Dear list members,
>
> Is it possible to generate a spatial nested grid in R?
>
> For example, a grid of several 8km x 8km tiles, and within that
grid, I
> want 4 tiles of 4km x 4km, and in each of those I want 4 tiles
of 2km x
> 2km, and in each of those I want 4 tiles of 1km x 1km.
>
> Manuel
>
--
Marcelino de la Cruz Rot
Coordinador funcional de Biología
Depto. de Biología y Geología
Física y Química Inorgánica
Universidad Rey Juan Carlos
Móstoles España
_______________________________________________
R-sig-Geo mailing list
R-sig-Geo@r-project.org
https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstat.ethz.ch%2Fmailman%2Flistinfo%2Fr-sig-geo&data=05%7C01%7CRoger.Bivand%40nhh.no%7C0b29de36aca54242ddf008db0b6ade31%7C33a15b2f849941998d56f20b5aa91af2%7C0%7C0%7C638116325854200214%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Ngv4yEcnP6JM4zq5rpVgzcYgRHAFwPPS8JRFhMaRA58%3D&reserved=0
--
*Manuel Spínola, Ph.D.*
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspin...@una.cr <mailto:mspin...@una.ac.cr>
mspinol...@gmail.com
Teléfono: (506) 8706 - 4662
Institutional website: ICOMVIS
<https://eur02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.icomvis.una.ac.cr%2Findex.php%2Fmanuel&data=05%7C01%7CRoger.Bivand%40nhh.no%7C0b29de36aca54242ddf008db0b6ade31%7C33a15b2f849941998d56f20b5aa91af2%7C0%7C0%7C638116325854200214%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=fCKSKsYuj7JXD5CbsQDKFUkeAVpqekVl%2BbTYM2dpuzU%3D&reserved=0>
Blog sobre Ciencia de Datos:
https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmspinola-ciencia-de-datos.netlify.app%2F&data=05%7C01%7CRoger.Bivand%40nhh.no%7C0b29de36aca54242ddf008db0b6ade31%7C33a15b2f849941998d56f20b5aa91af2%7C0%7C0%7C638116325854200214%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=cVcjfP2hgnbfK%2BZCrCGFi4HhnQjGEWtx8zeJ%2BjBZDtE%3D&reserved=0
--
Marcelino de la Cruz Rot
Coordinador funcional de Biología
Depto. de Biología y Geología
Física y Química Inorgánica
Universidad Rey Juan Carlos
Móstoles España
_______________________________________________
R-sig-Geo mailing list
R-sig-Geo@r-project.org
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
