The spatial data bundled in this package are in sf format. For the data in sf format, you can view the fields simply by typing the name of the data set

NEFSCspatial::Shellfish_Strata
#> Simple feature collection with 97 features and 9 fields
#> Geometry type: POLYGON
#> Dimension:     XY
#> Bounding box:  xmin: -75.95982 ymin: 35.50142 xmax: -65.89944 ymax: 42.16817
#> Geodetic CRS:  NAD83
#> First 10 features:
#>     AREA PERIMETER STRATA_ STRATA_ID   A2 STRATUM DEPTH_CODE         X        Y
#> 1  0.059     2.265       2      6662  589    6662          0 -66.51778 42.10263
#> 2  0.044     2.869       3      6661  438    6661          0 -67.83246 41.94479
#> 3  0.030     0.950       4      6652  297    6652          0 -66.90404 42.09048
#> 4  0.040     2.961       5      6651  398    6651          0 -67.78587 41.92387
#> 5  0.063     2.392       6      6710  632    6710          0 -67.38822 41.99469
#> 6  0.347     2.487       7      6640 3481    6640          0 -66.26606 41.78001
#> 7  0.129     1.563       8      6632 1293    6632          0 -66.73147 41.86695
#> 8  0.165     3.043       9      6740 1647    6740          0 -67.17305 41.64897
#> 9  0.128     3.305      10      6520 1274    6520          0 -69.31613 41.39498
#> 10 0.176     1.914      11      6720 1766    6720          0 -67.68407 41.80817
#>                          geometry
#> 1  POLYGON ((-67.11948 42.1301...
#> 2  POLYGON ((-67.11948 42.1301...
#> 3  POLYGON ((-67.07465 42.0782...
#> 4  POLYGON ((-67.07465 42.0782...
#> 5  POLYGON ((-67.07465 42.0782...
#> 6  POLYGON ((-66.04611 42.0563...
#> 7  POLYGON ((-66.67874 42.0522...
#> 8  POLYGON ((-67.02715 42.0232...
#> 9  POLYGON ((-69.83389 42.0467...
#> 10 POLYGON ((-67.29691 41.8896...

To visualize the data simply use the plot function

plot(NEFSCspatial::Shellfish_Strata)