图书馆 (平方英尺)
#>链接到GEOS 3.10.2、GDAL 3.4.3、PROJ 8.2.0; sf_use_s2()为真
图书馆 (sfdct)
数控<- 读取sf ( system.file(系统文件) ( “形状/nc.shp” , 包装= “sf” ), 安静= 真的 )
(nc_三角形<- ct_三角形 (数控[ 1 : 5 , c(c) ( “名称” )]))
#>具有5个功能和1个字段的简单功能集合
#>几何图形类型:GEOMETRYCOLLECTION
#>尺寸:XY
#>边界框:xmin:-81.74107 ymin:36.07282 xmax:-75.77316 ymax:36.58965
#>大地测量CRS:NAD27
#>#A台:5×2
#>名称几何图形
#>*<chr><几何颜色[°]>
#>1灰烬几何颜色(多边形((-81.54084 36.27251,-81.47276 36.23…
#>2 Alleghany几何选择(多边形(-81.24069 36.37942,-81.23989 36.36…
#>3 Surry几何配色(多边形((-80.87086 36.32462,-80.87438 36.23…
#>4当前几何颜色(多边形((-76.09106 36.50357,-76.15815 36.41…
#>5北安普敦几何颜色(POLYGON((-77.53808 36.30246,-77.58008 36.32…
(阿苏布<- st_几何 (nc_三角形)[[ 4 ]] )
#>几何配色(POLYGON((-76.09106 36.50357,-76.15815 36.41269,-76.09509 36.34892,-76.09105 36.50355)),POLYOGN, POLYGON((-76.00161 36.41891,-76.04395 36.35359,-76.01735 36.33773,-76.00151 36.4189一),POLYOGON((-75.95126 36.36547,-76.000161 36.4189,-76.01745 36.3377,-75.95126 36.36547),POLLYGON, POLYGON((-76.09106 36.50357,-76.09509 36.34892,-76.00161 36.41891,-76.0910636.50357]),POLYKON((.76.16829 36.42709,-76.09.106 36.50377,-76.1274 36.55716,-76.16829 3642709),POLLYGON, 多边形((-76.1274 36.55716,-76.33025 36.55606,-76.16829 36.42709,-76.1274 36.55716)),多边形((-76.09106 36.50357,-76.04596 36.55695,-76.1274 36.55716,-76.09106 36.50357)),多边形((-76.02717 36.55672,-75.97629 36.51793,-75.99866 36.55665,-76.02717 36.55672)), POLYGON((-76.00161 36.41891,-75.97607 36.43621,-76.09106 36.50357,-76.00141 36.4189一),POLYOGON((-76.3321 36.51437,-76.4596 36.55695,-76.09016 36.50357,-76.03321 36.512437),POLLYGON,(-75.95126 36.36547,-76.01735 36.33773,-76.00897 36.3196,-75.951226 36.36547), POLYGON((-75.95751 36.25945,-75.91376 36.2448,-75.94193 36.29434,-75.95752 36.25944),POLYOGN((-75.94193 36.29.434,-75.95126 36.36547,-76.00897 36.3196,-75.94.193 36.2943),POLLYGON, POLYGON((-75.80006 36.11282,-75.91376 36.2448,-75.85516 36.10567,-75.80007 36.11282),POLYOGON((-75.95126 36.36547,-75.94193 36.29434,-75.92459 36.35095,-75.95126 36.36547),POLLYGON, POLYGON((-75.87817 36.55587,-75.78317 36.22519,-75.77316 36.22926,-75.87816 36.55588),POLYKON((7-5.91376 36.2448,-75.80006 36.11282,-75.92459 36.35095,-75.91376 362448),POLLYGON, POLYGON((-75.97607 36.43621,-76.00161 36.41891,-75.96976 36.41512,-75.9760736.4362一),POLYOGON((-75.78317 36.22519,-75.87817 36.55587,-75.90199 36.5562,-75.7831736.22519),POLLYGON, 多边形((-75.95126 36.36547,-75.92459 36.35095,-75.92812 36.42324,-75.9512 36.36547)),多边形((7-5.91192 36.54253,-75.99866 36.55665,-75.97629 36.51793,-7591192 36.54 253))
st_几何 ( ct_三角形 (数控[ 4 , ], 一个= 0.0007 , D类= 真的 ))
#>1个特征的几何图形集
#>几何图形类型:GEOMETRYCOLLECTION
#>尺寸:XY
#>边界框:xmin:-76.33025 ymin:36.07282 xmax:-75.77316 ymax:36.55716
#>大地测量CRS:NAD27
#>几何配色(多边形((-76.02771 36.4037。。。