Read e00 files — e00_read

These functions generate temporary binary coverages under the hood and delete them afterward. The overhead for this operation is small, but you can do this conversion yourself using e00_convert().

e00_read_sf(e00, layer = "PAL", ...)

e00_layers(e00, ...)

e00_readOGR(e00, layer = "PAL", ...)

Arguments

e00	Path to a .e00 file.
layer	One of "ARC" (lines), "CNT" (centroids), "LAB" (label points), or "PAL" (polygons).
...	Passed to `sf::read_sf()`, `rgdal::readOGR()`, or `sf::st_layers()`.

Examples

e00 <- system.file("e00/cis_20170911.e00", package = "arce00")

e00_layers(e00)
#> Driver: AVCBin 
#> Available layers:
#>   layer_name geometry_type features fields
#> 1        ARC   Line String      230     11
#> 2        CNT         Point       88      1
#> 3        LAB         Point       87     68
#> 4        PAL       Polygon       87     67
e00_read_sf(e00)
#> Simple feature collection with 87 features and 67 fields
#> geometry type:  POLYGON
#> dimension:      XY
#> bbox:           xmin: 39656.16 ymin: 1165135 xmax: 2687056 ymax: 3743606
#> projected CRS:  unnamed
#> # A tibble: 87 x 68
#>       AREA PERIMETER ARCE00_COV. ARCE00_COV.ID A_LEGEND REGION DATE_CARTE SOURCE
#>      <dbl>     <dbl>       <int>         <int> <chr>    <chr>  <chr>      <chr> 
#>  1 8.85e11 31235633.           2             2 Bergy w… HB     20170911   ""    
#>  2 1.48e 8    94500.           3             3 Land     HB     20170911   ""    
#>  3 2.24e11 14482767.           4             4 Land     HB     20170911   ""    
#>  4 1.27e 8    53164.           5             5 Land     HB     20170911   ""    
#>  5 1.44e 8    87332.           6             6 Land     HB     20170911   ""    
#>  6 1.10e 8    71738.           7             7 Land     HB     20170911   ""    
#>  7 1.32e 8   110787.           8             8 Land     HB     20170911   ""    
#>  8 8.32e 7    78102.           9             9 Land     HB     20170911   ""    
#>  9 8.66e10  2431778.          10            10 Ice free HB     20170911   ""    
#> 10 4.18e 7    26337.          11            11 Land     HB     20170911   ""    
#> # … with 77 more rows, and 60 more variables: MOD <chr>, EGG_ID <int>,
#> #   PNT_TYPE <int>, EGG_NAME <chr>, EGG_SCALE <int>, EGG_ATTR <chr>,
#> #   USER_ATTR <chr>, ROTATION <int>, E_CT <chr>, E_CA <chr>, E_CB <chr>,
#> #   E_CC <chr>, E_CD <chr>, E_SO <chr>, E_SA <chr>, E_SB <chr>, E_SC <chr>,
#> #   E_SD <chr>, E_SE <chr>, E_FA <chr>, E_FB <chr>, E_FC <chr>, E_FD <chr>,
#> #   E_FE <chr>, E_CS <chr>, R_CT <chr>, R_CMY <chr>, R_CSY <chr>, R_CFY <chr>,
#> #   R_CGW <chr>, R_CG <chr>, R_CN <chr>, R_PMY <chr>, R_PSY <chr>, R_PFY <chr>,
#> #   R_PGW <chr>, R_PG <chr>, R_PN <chr>, R_CS <chr>, R_SMY <chr>, R_SSY <chr>,
#> #   R_SFY <chr>, R_SGW <chr>, R_SG <chr>, R_SN <chr>, N_CT <chr>, N_COI <chr>,
#> #   N_CMY <chr>, N_CSY <chr>, N_CFY <chr>, N_CFY_TK <chr>, N_CFY_M <chr>,
#> #   N_CFY_TN <chr>, N_CYI <chr>, N_CGW <chr>, N_CG <chr>, N_CN <chr>,
#> #   N_CB <chr>, ArcIds <list>, geometry <POLYGON [m]>
sp <- e00_readOGR(e00, layer = "LAB")
#> OGR data source with driver: AVCBin 
#> Source: "/private/var/folders/24/8k48jl6d249_n_qfxwsl6xvm0000gn/T/Rtmp9zNssK/file624170e73af/file62436d079e9/arce00_cov", layer: "LAB"
#> with 87 features
#> It has 68 fields
summary(sp)
#>                 Length                  Class                   Mode 
#>                     87 SpatialPointsDataFrame                     S4