TM_Operators: Classes and Construction Methods for Temporal Operator...
In 52North/sos4R: Client for OGC Sensor Observation Services

Description Usage Arguments Value Objects from the Class Slots Extends Methods Author(s) References See Also Examples

Classes for temporal operators from OpenGIS(R) Filter Encoding used in filters in GetObservation requests.

TM_After(propertyName = sosDefaultTempOpPropertyName, time)
TM_Before(propertyName = sosDefaultTempOpPropertyName, time)
TM_During(propertyName = sosDefaultTempOpPropertyName, time)
TM_Equals(propertyName = sosDefaultTempOpPropertyName, time)

`propertyName`	The name of the property that is used to wrap the time.
`time`	A time instant or period to be used as the temporal operand.

An object of the respective class, so TM_After, TM_Before, TM_During or TM_Equals

Objects can be created by calls of the form new("TM_After", ...).

time:: Object of class "GmlTimeInstant"
propertyName:: Object of class "character"

Class "OgcBinaryTemporalOp", directly. Class "OgcBinaryTemporalOpOrNULL", by class "OgcBinaryTemporalOp", distance 2.

encodeXML: signature(obj = "TM_After", sos = "SOS"): ...
show: signature(object = "TM_After"): ...
encodeXML: signature(obj = "TM_Before", sos = "SOS"): ...
show: signature(object = "TM_Before"): ...
encodeXML: signature(obj = "TM_During", sos = "SOS"): ...
show: signature(object = "TM_During"): ...
encodeXML: signature(obj = "TM_Equals", sos = "SOS"): ...
show: signature(object = "TM_Equals"): ...

Daniel Nuest daniel.nuest@uni-muenster.de

Vretanos, Panagiotis A. (Ed.), OpenGIS(R) Filter Encoding Implementation Specification, OGC 04-095, Version: 1.1.0

See the schema file: http://schemas.opengis.net/sos/1.0.0/ogc4sos.xsd.

SosGetObservation

showClass("TM_After")
showClass("TM_Before")
showClass("TM_During")
showClass("TM_Equals")

## Not run: 
# create times to use for operators
t1 <- sosCreateTimeInstant(sos = weathersos, time = Sys.time())
p1 <- sosCreateTimePeriod(sos = weathersos, begin = as.POSIXct("2010-03-01 12:15"),
                          end = as.POSIXct("2010-03-02 12:15"))

# create temporal operator
afterNow <- TM_After(time = t1)
print(afterNow)
encodeXML(t1, sos)

during <- TM_During(time = p1)
print(during)

## End(Not run)