readShapeSpatial.RdThe use of this function is deprecated and it is not being maintained. Use rgdal::readOGR() or sf::st_read() instead - both of these read the coordinate reference system from the input file, while this deprecated function does not. For writing, use rgdal::writeOGR() or sf::st_write() instead.
The readShapeSpatial reads data from a shapefile into a Spatial*DataFrame object. The writeSpatialShape function writes data from a Spatial*DataFrame object to a shapefile. Note DBF file restrictions in write.dbf.
readShapeSpatial(fn, proj4string=CRS(as.character(NA)), verbose=FALSE, repair=FALSE, IDvar=NULL, force_ring=FALSE, delete_null_obj=FALSE, retrieve_ABS_null=FALSE) writeSpatialShape(x, fn, factor2char = TRUE, max_nchar=254)
| fn | shapefile layer name, when writing omitting the extensions *.shp, *.shx and *.dbf, which are added in the function |
|---|---|
| proj4string | Object of class |
| verbose | default FALSE - report type of shapefile and number of shapes |
| repair | default FALSE: some shapefiles provided by Geolytics Inc. have values of object sizes stored in the *.shx index file that are eight bytes too large, leading the function to try to read past the end of file. If repair=TRUE, an attempt is made to repair the internal values, permitting such files to be read. |
| IDvar | a character string: the name of a column in the shapefile DBF containing the ID values of the shapes - the values will be converted to a character vector (Polygons only) |
| force_ring | if TRUE, close unclosed input rings (Polygons only) |
| delete_null_obj | if TRUE, null geometries inserted by ABS will be removed together with their data.frame rows (Polygons and Lines) |
| retrieve_ABS_null | default FALSE, if TRUE and delete\_null\_obj also TRUE, the function will return a data frame containing the data from any null geometries inserted by ABS (Polygons only) |
| x | a vector data |
| factor2char | logical, default TRUE, convert factor columns to character |
| max_nchar | default 254, may be set to a higher limit and passed through to the DBF writer, please see Details in |
If no IDvar argument is given, the shpID values of the shapefile will be used as Polygons ID values; when writing shapefiles, the object data slot row.names are added to the DBF file as column SP\_ID.
a Spatial*DataFrame object of a class corresponding to the input shapefile
Roger Bivand
library(maptools) xx <- readShapeSpatial(system.file("shapes/sids.shp", package="maptools")[1], IDvar="FIPSNO", proj4string=CRS("+proj=longlat +ellps=clrk66"))#> Warning: readShapeSpatial is deprecated; use rgdal::readOGR or sf::st_read#> Warning: readShapePoly is deprecated; use rgdal::readOGR or sf::st_read#> Object of class SpatialPolygonsDataFrame #> Coordinates: #> min max #> x -84.32385 -75.45698 #> y 33.88199 36.58965 #> Is projected: FALSE #> proj4string : [+proj=longlat +ellps=clrk66 +no_defs] #> Data attributes: #> AREA PERIMETER CNTY_ CNTY_ID NAME #> Min. :0.0420 Min. :0.999 Min. :1825 Min. :1825 Alamance : 1 #> 1st Qu.:0.0910 1st Qu.:1.324 1st Qu.:1902 1st Qu.:1902 Alexander: 1 #> Median :0.1205 Median :1.609 Median :1982 Median :1982 Alleghany: 1 #> Mean :0.1263 Mean :1.673 Mean :1986 Mean :1986 Anson : 1 #> 3rd Qu.:0.1542 3rd Qu.:1.859 3rd Qu.:2067 3rd Qu.:2067 Ashe : 1 #> Max. :0.2410 Max. :3.640 Max. :2241 Max. :2241 Avery : 1 #> (Other) :94 #> FIPS FIPSNO CRESS_ID BIR74 SID74 #> 37001 : 1 Min. :37001 Min. : 1.00 Min. : 248 Min. : 0.00 #> 37003 : 1 1st Qu.:37050 1st Qu.: 25.75 1st Qu.: 1077 1st Qu.: 2.00 #> 37005 : 1 Median :37100 Median : 50.50 Median : 2180 Median : 4.00 #> 37007 : 1 Mean :37100 Mean : 50.50 Mean : 3300 Mean : 6.67 #> 37009 : 1 3rd Qu.:37150 3rd Qu.: 75.25 3rd Qu.: 3936 3rd Qu.: 8.25 #> 37011 : 1 Max. :37199 Max. :100.00 Max. :21588 Max. :44.00 #> (Other):94 #> NWBIR74 BIR79 SID79 NWBIR79 #> Min. : 1.0 Min. : 319 Min. : 0.00 Min. : 3.0 #> 1st Qu.: 190.0 1st Qu.: 1336 1st Qu.: 2.00 1st Qu.: 250.5 #> Median : 697.5 Median : 2636 Median : 5.00 Median : 874.5 #> Mean :1050.8 Mean : 4224 Mean : 8.36 Mean : 1352.8 #> 3rd Qu.:1168.5 3rd Qu.: 4889 3rd Qu.:10.25 3rd Qu.: 1406.8 #> Max. :8027.0 Max. :30757 Max. :57.00 Max. :11631.0 #>#> Warning: writeSpatialShape is deprecated; use rgdal::writeOGR or sf::st_write#> Warning: writePolyShape is deprecated; use rgdal::writeOGR or sf::st_write#> Shapefile type: Polygon, (5), # of Shapes: 24unlink(paste(tmpfl, ".*", sep="")) xx <- readShapeSpatial(system.file("shapes/fylk-val.shp", package="maptools")[1], proj4string=CRS("+proj=utm +zone=33 +datum=WGS84"))#> Warning: readShapeSpatial is deprecated; use rgdal::readOGR or sf::st_read#> Warning: readShapeLines is deprecated; use rgdal::readOGR or sf::st_read#> Object of class SpatialLinesDataFrame #> Coordinates: #> min max #> x -4867.832 1084722 #> y 6456207.000 7841997 #> Is projected: TRUE #> proj4string : #> [+proj=utm +zone=33 +datum=WGS84 +units=m +no_defs] #> Data attributes: #> FNODE_ TNODE_ LPOLY_ RPOLY_ #> Min. : 1.00 Min. : 2.00 Min. :1.00 Min. :1.00 #> 1st Qu.: 40.00 1st Qu.: 39.00 1st Qu.:2.00 1st Qu.:2.00 #> Median : 74.00 Median : 77.00 Median :2.00 Median :2.00 #> Mean : 77.62 Mean : 77.55 Mean :1.99 Mean :1.99 #> 3rd Qu.:115.00 3rd Qu.:114.00 3rd Qu.:2.00 3rd Qu.:2.00 #> Max. :160.00 Max. :159.00 Max. :2.00 Max. :2.00 #> LENGTH VALINJE_ VALINJE_ID LTEMA VANNBR #> Min. : 106.4 Min. : 1 Min. : 55.00 Min. :3211 Min. :13 #> 1st Qu.: 11866.5 1st Qu.:25 1st Qu.: 74.00 1st Qu.:3211 1st Qu.:13 #> Median : 31910.9 Median :49 Median : 95.00 Median :3211 Median :13 #> Mean : 41374.7 Mean :49 Mean : 94.32 Mean :3211 Mean :13 #> 3rd Qu.: 59311.8 3rd Qu.:73 3rd Qu.:114.00 3rd Qu.:3211 3rd Qu.:13 #> Max. :176540.1 Max. :97 Max. :135.00 Max. :3211 Max. :13 #> DATO #> Min. :19970630 #> 1st Qu.:19970630 #> Median :19970630 #> Mean :19970630 #> 3rd Qu.:19970630 #> Max. :19970630#> Error in plot.xy(xy.coords(x, y), type = type, ...): plot.new has not been called yet#> Warning: writeSpatialShape is deprecated; use rgdal::writeOGR or sf::st_write#> Warning: writeLinesShape is deprecated; use rgdal::writeOGR or sf::st_write#> Shapefile type: PolyLine, (3), # of Shapes: 51unlink(paste(tmpfl, ".*", sep="")) xx <- readShapeSpatial(system.file("shapes/baltim.shp", package="maptools")[1])#> Warning: readShapeSpatial is deprecated; use rgdal::readOGR or sf::st_read#> Warning: readShapePoints is deprecated; use rgdal::readOGR or sf::st_read#> Object of class SpatialPointsDataFrame #> Coordinates: #> min max #> coords.x1 860.0 987.5 #> coords.x2 505.5 581.0 #> Is projected: NA #> proj4string : [NA] #> Number of points: 211 #> Data attributes: #> STATION PRICE NROOM DWELL #> Min. : 1.0 Min. : 3.50 Min. : 3.000 Min. :0.0000 #> 1st Qu.: 53.5 1st Qu.: 30.95 1st Qu.: 5.000 1st Qu.:0.0000 #> Median :106.0 Median : 40.00 Median : 5.000 Median :1.0000 #> Mean :106.0 Mean : 44.31 Mean : 5.199 Mean :0.5355 #> 3rd Qu.:158.5 3rd Qu.: 53.75 3rd Qu.: 6.000 3rd Qu.:1.0000 #> Max. :211.0 Max. :165.00 Max. :10.000 Max. :1.0000 #> NBATH PATIO FIREPL AC #> Min. :1.000 Min. :0.0000 Min. :0.0000 Min. :0.0000 #> 1st Qu.:1.000 1st Qu.:0.0000 1st Qu.:0.0000 1st Qu.:0.0000 #> Median :1.500 Median :0.0000 Median :0.0000 Median :0.0000 #> Mean :1.573 Mean :0.1469 Mean :0.2417 Mean :0.2417 #> 3rd Qu.:2.000 3rd Qu.:0.0000 3rd Qu.:0.0000 3rd Qu.:0.0000 #> Max. :5.000 Max. :1.0000 Max. :1.0000 Max. :1.0000 #> BMENT NSTOR GAR AGE #> Min. :0.000 Min. :1.000 Min. :0.0000 Min. : 0.0 #> 1st Qu.:2.000 1st Qu.:2.000 1st Qu.:0.0000 1st Qu.: 20.0 #> Median :2.000 Median :2.000 Median :0.0000 Median : 25.0 #> Mean :1.981 Mean :1.905 Mean :0.2512 Mean : 30.1 #> 3rd Qu.:3.000 3rd Qu.:2.000 3rd Qu.:0.0000 3rd Qu.: 40.0 #> Max. :3.000 Max. :3.000 Max. :3.0000 Max. :148.0 #> CITCOU LOTSZ SQFT X #> Min. :0.0000 Min. : 5.70 Min. : 5.76 Min. :860.0 #> 1st Qu.:0.0000 1st Qu.: 20.76 1st Qu.:11.02 1st Qu.:889.0 #> Median :1.0000 Median : 56.25 Median :13.44 Median :910.0 #> Mean :0.6066 Mean : 72.28 Mean :16.43 Mean :911.6 #> 3rd Qu.:1.0000 3rd Qu.: 84.32 3rd Qu.:19.94 3rd Qu.:933.5 #> Max. :1.0000 Max. :400.37 Max. :47.61 Max. :987.5 #> Y #> Min. :505.5 #> 1st Qu.:528.8 #> Median :544.5 #> Mean :544.2 #> 3rd Qu.:559.0 #> Max. :581.0#> Warning: writeSpatialShape is deprecated; use rgdal::writeOGR or sf::st_write#> Warning: writePointsShape is deprecated; use rgdal::writeOGR or sf::st_write#> Shapefile type: Point, (1), # of Shapes: 103