describe
describe.RdDescribe the properties of spatial data in a file as generated with the "GDALinfo" tool.
Usage
# S4 method for class 'character'
describe(x, sds=FALSE, meta=FALSE, parse=FALSE, options="", print=FALSE, open_opt="")Arguments
- x
character. The name of a file with spatial data. Or a fully specified subdataset within a file such as
"NETCDF:\"AVHRR.nc\":NDVI"- sds
logical. If
TRUEthe description or metadata of the subdatasets is returned (if available)- meta
logical. Get the file level metadata instead
- parse
logical. If
TRUE, metadata for subdatasets is parsed into components (ifmeta=TRUE)- options
character. A vector of valid options (if
meta=FALSE) including "json", "mm", "stats", "hist", "nogcp", "nomd", "norat", "noct", "nofl", "checksum", "proj4", "listmdd", "mdd <value>" where <value> specifies a domain or 'all', "wkt_format <value>" where value is one of 'WKT1', 'WKT2', 'WKT2_2015', or 'WKT2_2018', "sd <subdataset>" where <subdataset> is the name or identifier of a sub-dataset. See https://gdal.org/en/latest/programs/gdalinfo.html. Ignored ifsds=TRUElogical. If
TRUE, print the results- open_opt
character. Driver specific open options
Examples
f <- system.file("ex/elev.tif", package="terra")
describe(f)
#> [1] "Driver: GTiff/GeoTIFF"
#> [2] "Files: /Users/runner/work/_temp/Library/terra/ex/elev.tif"
#> [3] "Size is 95, 90"
#> [4] "Coordinate System is:"
#> [5] "GEOGCRS[\"WGS 84\","
#> [6] " ENSEMBLE[\"World Geodetic System 1984 ensemble\","
#> [7] " MEMBER[\"World Geodetic System 1984 (Transit)\"],"
#> [8] " MEMBER[\"World Geodetic System 1984 (G730)\"],"
#> [9] " MEMBER[\"World Geodetic System 1984 (G873)\"],"
#> [10] " MEMBER[\"World Geodetic System 1984 (G1150)\"],"
#> [11] " MEMBER[\"World Geodetic System 1984 (G1674)\"],"
#> [12] " MEMBER[\"World Geodetic System 1984 (G1762)\"],"
#> [13] " MEMBER[\"World Geodetic System 1984 (G2139)\"],"
#> [14] " MEMBER[\"World Geodetic System 1984 (G2296)\"],"
#> [15] " ELLIPSOID[\"WGS 84\",6378137,298.257223563,"
#> [16] " LENGTHUNIT[\"metre\",1]],"
#> [17] " ENSEMBLEACCURACY[2.0]],"
#> [18] " PRIMEM[\"Greenwich\",0,"
#> [19] " ANGLEUNIT[\"degree\",0.0174532925199433]],"
#> [20] " CS[ellipsoidal,2],"
#> [21] " AXIS[\"geodetic latitude (Lat)\",north,"
#> [22] " ORDER[1],"
#> [23] " ANGLEUNIT[\"degree\",0.0174532925199433]],"
#> [24] " AXIS[\"geodetic longitude (Lon)\",east,"
#> [25] " ORDER[2],"
#> [26] " ANGLEUNIT[\"degree\",0.0174532925199433]],"
#> [27] " USAGE["
#> [28] " SCOPE[\"Horizontal component of 3D system.\"],"
#> [29] " AREA[\"World.\"],"
#> [30] " BBOX[-90,-180,90,180]],"
#> [31] " ID[\"EPSG\",4326]]"
#> [32] "Data axis to CRS axis mapping: 2,1"
#> [33] "Origin = (5.741666666666666,50.191666666666663)"
#> [34] "Pixel Size = (0.008333333333333,-0.008333333333333)"
#> [35] "Metadata:"
#> [36] " AREA_OR_POINT=Area"
#> [37] "Image Structure Metadata:"
#> [38] " COMPRESSION=LZW"
#> [39] " INTERLEAVE=BAND"
#> [40] "Corner Coordinates:"
#> [41] "Upper Left ( 5.7416667, 50.1916667) ( 5d44'30.00\"E, 50d11'30.00\"N)"
#> [42] "Lower Left ( 5.7416667, 49.4416667) ( 5d44'30.00\"E, 49d26'30.00\"N)"
#> [43] "Upper Right ( 6.5333333, 50.1916667) ( 6d32' 0.00\"E, 50d11'30.00\"N)"
#> [44] "Lower Right ( 6.5333333, 49.4416667) ( 6d32' 0.00\"E, 49d26'30.00\"N)"
#> [45] "Center ( 6.1375000, 49.8166667) ( 6d 8'15.00\"E, 49d49' 0.00\"N)"
#> [46] "Band 1 Block=95x43 Type=Int16, ColorInterp=Gray"
#> [47] " Description = elevation"
#> [48] " Min=141.000 Max=547.000 "
#> [49] " Minimum=141.000, Maximum=547.000, Mean=-9999.000, StdDev=-9999.000"
#> [50] " NoData Value=-32768"
#> [51] " Metadata:"
#> [52] " STATISTICS_MAXIMUM=547"
#> [53] " STATISTICS_MEAN=-9999"
#> [54] " STATISTICS_MINIMUM=141"
#> [55] " STATISTICS_STDDEV=-9999"
describe(f, meta=TRUE)
#> [1] "AREA_OR_POINT=Area"
#g <- describe(f, options=c("json", "nomd", "proj4"))
#head(g)