sos4R (version 0.1-15)

sosCreate: Convenience Functions for Request Parameter Creations

Description

These methods can be seen as convenience functions or shortcuts to regularly used parameters in GetObservation requests to a Sensor Observation Service. The remove some complexity and target the most common cases, but also limit flexibility.

Usage

sosCreateBBOX(lowLat, lowLon, uppLat, uppLon, srsName, srsDimension = NA_integer_, axisLabels = NA_character_, uomLabels = NA_character_, propertyName = sosDefaultSpatialOpPropertyName)
sosCreateBBoxMatrix(lowLat, lowLon, uppLat, uppLon)
sosCreateFeatureOfInterest(objectIDs = list(NA), spatialOps = NULL, bbox = NULL, srsName = NA_character_)
sosCreateEventTime(time, operator)
sosCreateEventTimeList(time, operator)
sosCreateTimeInstant(sos, time, frame = as.character(NA), calendarEraName = as.character(NA), indeterminatePosition = as.character(NA))
sosCreateTimePeriod(sos, begin, end, frame = as.character(NA), calendarEraName = as.character(NA), indeterminatePosition = as.character(NA), duration = as.character(NA), timeInterval = NULL)

Arguments

lowLat

Minimum latitude for bounding box and boundinb box matrix.

lowLon

Minimum longitude for bounding box and boundinb box matrix.

uppLat

Maximum latitude for bounding box and boundinb box matrix.

uppLon

Maximum longitude for bounding box and boundinb box matrix.

srsName

Name of the spatial reference system for bounding box, e.g. "urn:ogc:def:crs:EPSG:4326".

srsDimension

Dimensions of the spatial reference system, e.g. 2.

axisLabels

Labels of the axes of a bounding box as an ordered character vector.

uomLabels

Unit of measurement labels as an ordered character vector for the axes in a bounding box, e.g. "deg".

propertyName

The spatial property name for the bounding box, e.g. "urn:ogc:data:location"

objectIDs

Identifiers of a feature of interest list.

spatialOps

An object of class OgcSpatialOps-class which is inserted into the feature of interest element.

bbox

Shortcut to add a feature of interest with a GmlEnvelope-class, object must be a matrix as created by sosCreateBBoxMatrix(...).

time

Object of class "GmlTimeGeometricPrimitive" for sosCreateEventTimeList, or an object of class POSIXt for sosCreateTimePeriod.

operator

The operator to be used for the time in sosCreateEventTimeList, e.g. "TM_During".

sos

An object of class SOS-class for which the element is created. The SOS might for example be required for formatting settings.

frame

Provides a URI reference that identifies a description of the reference system.

calendarEraName

The name of the calendar era.

begin

Object of class POSIXt.

end

Object of class POSIXt.

indeterminatePosition

Inexact temporal positions may be expressed using the optional indeterminatePosition parameter. This takes one of the following values: after, before, now, unknown.

duration

Duration of an interval using ISO 8601 syntax for temporal length.

timeInterval

An object of class "GmlTimeIntervalOrNULL" to be used in a GmlTimePeriod-class.

Value

• An object of the respective class, or a list in case of sosEventTimeList.

See Also

These methods create object of the following classes: GmlTimeInstant-class, GmlTimePeriod-class, SosEventTime-class, SosFeatureOfInterest-class, OgcBBOX-class, matrix-class.

Examples

# create a feature of interest based on identifiers
foiIDs <- list("urn:ogc:object:feature:1", "urn:ogc:object:feature:2")
foiObj <- sosCreateFeatureOfInterest(objectIDs = foiIDs[1:2])
print(foiObj)

# create a bounding box matrix and use it to create a spatial feature of interest
bboxMatrix <- sosCreateBBoxMatrix(lowLat = 50.0, lowLon = 7.0, uppLat = 53.0, uppLon = 10.0)
foiBBox <- sosCreateFeatureOfInterest(bbox = bboxMatrix, srsName = "urn:ogc:def:crs:EPSG:6.8:4326")
print(foiBBox)

# create a foi with a bounding box
bbox <- sosCreateBBOX(lowLat = 50.0, lowLon = 7.0, uppLat = 53.0, uppLon = 10.0, srsName = "urn:ogc:def:crs:EPSG:6.8:4326", srsDimension = as.integer(2), axisLabels = "lat,lon", uomLabels = "deg,deg", propertyName = "bboxName")
foiBBox2 <- sosCreateFeatureOfInterest(spatialOps = bbox)
print(foiBBox2)

# time examples TBD