On Tue, 14 Apr 2020, Joe Lewis wrote:
Hi,
I'm trying to create an owin object from a SpatialPolygons, but I'm getting
the following error:
Error in .Call(eCclipbool, A, B, pftA, pftB, ct, x0, y0, eps, closed, :
Incorrect number of arguments (9), expecting 8 for 'Cclipbool'
I'm using as.owin.SpatialPolygons from the Maptools package.
Reproducible example:
x <- raster::getData(name = "GADM", country = "GBR", level = 3)
x <- x[x$NAME_3 == "Falkirk",]
osgb <- "+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000
+y_0=-100000 +ellps=airy +datum=OSGB36 +units=m +no_defs"
x <- sp::spTransform(x, osgb)
x <- rgeos::gSimplify(x, tol = 4, topologyPreserve = TRUE)
# this works fine.
x1 <- maptools::as.owin.SpatialPolygons(as(raster::extent(x),
"SpatialPolygons"))
# this causes the above error
x2 <- maptools::as.owin.SpatialPolygons(x, "SpatialPolygons")
Using your example with both FALSE and TRUE settings of
spatstat::spatstat.options("checkpolygons"), I cannot reprodoce any error.
This with spatstat_1.63-3, spatstat.data_1.4-3, polyclip_1.10-0 on R 4.0.0
beta. You are using development versions of these packages. Note that
gSimplify() may not be deterministic, and that changes in PROJ/GDAL render
your use of spTransform() degraded. You need to read through
https://www.r-spatial.org/r/2020/03/17/wkt.html.
Hope this helps,
Roger
---
Session Info:
R version 3.4.1 (2017-06-30)
attached base packages:
[1] stats graphics grDevices utils datasets methods base
loaded via a namespace (and not attached):
[1] Rcpp_1.0.3 lattice_0.20-35 codetools_0.2-15
deldir_0.1-25 grid_3.4.1
[6] nlme_3.1-131 tensor_1.5 raster_2.8-19
spatstat_1.63-3.032 sp_1.3-1
[11] rpart_4.1-12 goftest_1.2-2 Matrix_1.2-10
spatstat.utils_1.17-0 rgdal_1.4-3
[16] tools_3.4.1 foreign_0.8-69 polyclip_1.10-0.001
spatstat.data_1.4-3 abind_1.4-5
[21] compiler_3.4.1 maptools_0.9-9 mgcv_1.8-17
rgeos_0.4-3
Any help would be appreciated.
Thank you.
Kind regards,
Joseph Lewis
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--
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; e-mail: roger.biv...@nhh.no
https://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en
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