osh_filter: Apply filters to an 'oshex-class'

In dof1985/OSHEX: Open Street Map History File Explorer

Description

Filter an oshex-class based on temporal, tags and attributes expression Lists.

Usage

osh_filter(object, conditions = NULL, union = FALSE, full.parse = TRUE)


  ## S4 method for signature 
## 'oshex,listORmissing,logicalORmissing,logicalORmissing'
osh_filter(object,
  conditions = NULL, union = FALSE, full.parse = TRUE)


  ## S4 method for signature 
## 'oshElement,oshExListTag,logicalORmissing,logicalORmissing'
osh_filter(object,
  conditions = NULL, union = FALSE, full.parse = TRUE)


  ## S4 method for signature 
## 'oshElement,oshExListAttrs,logicalORmissing,logicalORmissing'
osh_filter(object,
  conditions = NULL, union = FALSE, full.parse = TRUE)


  ## S4 method for signature 
## 'oshElement,oshExListTemp,logicalORmissing,logicalORmissing'
osh_filter(object,
  conditions = NULL, union = FALSE, full.parse = TRUE)


  ## S4 method for signature 
## 'nodeList,oshExListGeo,logicalORmissing,logicalORmissing'
osh_filter(object,
  conditions = NULL, union = FALSE, full.parse = TRUE)


  ## S4 method for signature 
## 'oshElement,oshExListGeo,logicalORmissing,logicalORmissing'
osh_filter(object,
  conditions = NULL, union = FALSE, full.parse = TRUE)

Arguments

object	An oshex object as given by as_oshex.
conditions	One condition given as an oshExList-class object, or a list with several conditions.
union	A logical to determine if the result is a union of all conditions (if TRUE) or their intersection (if FALSE). Defaults to FALSE.
full.parse	A logical to determine if filter should keep interrelated objects (See 'Details' below). Defaults to TRUE.

Methods (by class)

• object = oshex,conditions = listORmissing,union = logicalORmissing,full.parse = logicalORmissing: Filter an oshex object.

• object = oshElement,conditions = oshExListTag,union = logicalORmissing,full.parse = logicalORmissing: Filter the tags slot of an oshElement object.

• object = oshElement,conditions = oshExListAttrs,union = logicalORmissing,full.parse = logicalORmissing: Filter the attrs slot of an oshElement object

• object = oshElement,conditions = oshExListTemp,union = logicalORmissing,full.parse = logicalORmissing: Filter the timestamp of an oshElement object

• object = nodeList,conditions = oshExListGeo,union = logicalORmissing,full.parse = logicalORmissing: Filters an osh nodeList based on a geographic query.

• object = oshElement,conditions = oshExListGeo,union = logicalORmissing,full.parse = logicalORmissing: Filters an oshElement object based on a geographic query.

Details

Information in an oshex object is split by type between nodes, ways, and relations. Nodes function both as independent objects (e.g. bus-stops) or as building blocks of a way (line or polygons). In addition, individual objects play a role as members of a relation object. For example, bus-stops (nodes), and bus-routes (ways) form together a public transport relation. osh_filter can account for these interrelated objects by setting full.parse = TRUE.

Examples

## Not run: 
highway <- osh_filter(object = osh, conditions = tag(c(k %eq% highway, v %eq% primary), union = FALSE)

## End(Not run)

dof1985/OSHEX documentation built on May 28, 2019, 3:36 p.m.