然而,如果我们使用st_intersects,我们只会得到一个逻辑结果告诉我们是否确实存在r和s之间的交集。如果我们尝试使用它来对r进行子集划分以查找交集,我们不会得到相交的形状,而只会得到原始矩形: r[which(unlist(st_intersects(s, r)) == 1)] #> Geometry set for 1 feature #> geometry type: POLYGON #> dim...
多线程并发如何保证线程安全 - 避免线程之间共享一个SimpleDateFormat对象，每个线程使用时都创建一次Simple...
library(sf) #> Warning: package 'sf' was built under R version 3.5.2 #> Linking to GEOS 3.6.1, GDAL 2.2.3, PROJ 4.9.3 ## remotes::install_github("mdsumner/spacebucket") library(spacebucket) geom <- sf::read_sf("C:\\temp\\trouble\\trouble_geom.shp") bucket <- spacebucket(ge...
90},{10,54,74,26}}; float *p; float *aa(float (*pt)[4]); int i; ...
On Win10 old T420s laptop R 4.0.2 and sf 0.7-4 built locally with current Rcpp and Rtools4, GEOS 3.6.1 38 sec. So the regression is very real for this data set. It is not coming from different versions of Rcpp or R itself. I have not succeeded in installing sf 0.9-6 against...
LEGRAND (Le Liceul de Turin, preface de R. LAURENTIN, Desclee De Brouwer, Parigi, 1980, p. 116): according to the author, these objects are preserved at the Musée du Cinquantenaire of Bruxelles, where they are classified as 'phalères' (horse ornaments). Nevertheless, the author himself...
Intersection at LaGrange Road and 191st Street slated to be improvedRobert Baker
doi:10.1016/j.jglr.2021.07.007Oana BirceanuLaura R. TessierBelinda HuertaWeiming LiMichael P. WilkieJournal of Great Lakes Research
Publication » “Response to: Discussion on `A. Aguiar and R. Fosdick, Self-intersection in elasticity' [International Journal of Solids and Structures 38 (28) (2001) 4797–4825]”.doi:10.1016/S0020-7683(01)00282-7R FosdickElsevier LtdInternational Journal of Solids & Structures...
Gharahi, HamidrezaAkhooni, Safoora RozehkhanRahimi, HabibIranian Journal of Geophysics (IJG)