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# R classes for vector type data
# Robert J. Hijmans, r.hijmans@gmail.com
# March 2010
# Version 0.0
# Licence GPL v3
setClass('.GeoSpatial',
contains = 'VIRTUAL',
)
setClass('.GeoSpatialShape',
contains = '.GeoSpatial',
representation (
code = 'integer',
length = 'integer',
version = 'integer',
type = 'integer',
xmin = 'numeric',
xmax = 'numeric',
ymin = 'numeric',
ymax = 'numeric',
zmin = 'numeric',
zmax = 'numeric',
mmin = 'numeric',
mmax = 'numeric',
nrecords = 'integer',
index = 'matrix'
),
prototype (
zmin = -Inf,
zmax = -Inf,
mmin = -Inf,
mmax = -Inf,
nrecords = as.integer(-1)
)
)
setClass('.GeoAttributes',
contains = 'VIRTUAL',
representation (
nrecords = 'integer',
nfields = 'integer',
fields = 'data.frame'
)
)
setClass('.GeoAttributesDBF',
contains = '.GeoAttributes',
representation (
file.version = 'integer',
file.date = 'character',
header.length = 'integer',
record.length = 'integer'
)
)
setClass ('.GeoData',
representation (
xy = 'matrix'
)
)
setClass ('VectorLayer',
contains = 'VIRTUAL',
representation (
file = 'character',
driver = 'character',
vec = '.GeoSpatial',
att = '.GeoAttributes',
data = '.GeoData',
nrecords = 'integer',
crs = 'CRS'
),
prototype (
file = '',
nrecords = as.integer(-1),
crs = CRS(as.character(NA))
),
validity = function(object) {
return(TRUE)
}
)
setClass ('VectorLayerPolygons',
contains = 'VectorLayer',
representation (
holes = 'matrix'
),
prototype (
),
validity = function(object) {
return(TRUE)
}
)
setClass ('VectorLayerLines',
contains = 'VectorLayer',
representation (
),
prototype (
),
validity = function(object) {
return(TRUE)
}
)
setClass ('VectorLayerPoints',
contains = 'VectorLayer',
representation (
),
prototype (
),
validity = function(object) {
return(TRUE)
}
)
setMethod ('show' , 'VectorLayer',
function(object) {
cat('class :' , class(object), '\n')
cat('filename :' , object@file, '\n')
cat('nrecords :' , object@nrecords, '\n')
cat('nfields :' , object@att@nfields, '\n')
cat('coord. ref. :' , projection(object, TRUE), '\n')
}
)
setMethod('dimnames', signature(x='VectorLayer'),
function(x) {
return(list(NULL, x@att@fields$NAME))
}
)
setMethod('dimnames', signature(x='SpatialPolygonsDataFrame'),
function(x) {
dimnames(x@data)
}
)
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