postx_functions Namespace Reference

Serves to solve problems after solutions connected to the crossroad representation. More...

Functions
def	extractnodes (basedata)
	Function takes all the nodes from basedata and appends them into a list it returns. More...
def	get_each_closest (coordinates, fine_nodes)
	For each coordinate go through all fine_nodes and find the closest one. More...
def	get_list_complement (alist, blist)
	What the functions does is: xlist = alist - blist. More...
def	feature_deletion_matchwise (adata, bdata, matchfactor)
	Compare these two maps (adata, bdata). More...

Detailed Description

Serves to solve problems after solutions connected to the crossroad representation.

These funtions are aimed to help get more refined (fine) representation of the input data in normalised state.

Function Documentation

extractnodes()

def postx_functions.extractnodes

(

basedata

)

Function takes all the nodes from basedata and appends them into a list it returns.

Parameters

basedata

type dictionary and has to satisfy used case-specific geojson format (OSM)

feature_deletion_matchwise()

def postx_functions.feature_deletion_matchwise	(		adata,
			bdata,
			matchfactor
	)

Compare these two maps (adata, bdata).

Each feature with the correspondent one. And if the adata does not contain more than "matchfactor" percent of nodes it should (bdata reference), then delete the whole feature (all coordinates).

adata, bdata -- geojson based format OSM

Parameters

matchfactor

(0-100) in percent - for number of nodes in basemaps comparison. Bigger number deletes less features.

get_each_closest()

def postx_functions.get_each_closest	(		coordinates,
			fine_nodes
	)

For each coordinate go through all fine_nodes and find the closest one.

The closest one will be stored in winnode - list which will be returned.

Parameters

coordinates

list of input data nodes [[lon1,lat1],[lon2,lat2],...] @param fine_nodes nodes obtained from json formerData - fine @param representation

get_list_complement()

def postx_functions.get_list_complement	(		alist,
			blist
	)

What the functions does is: xlist = alist - blist.

The return value is equal to the alist while not containing any item equal to any item in the blist list.

alist, blist -- both list of nodes [[lon1,lat1],[lon2,lat2],...]