[OSM-dev] Processing dual carriageway highways into one linestring?`

[Michael Reichert]

Hi Joseph,

Am 18.10.19 um 04:29 schrieb Joseph Eisenberg:
> Has anyone implemented a rendering that handles dual-carriageway
> roads, or designed a way to import such ways into a (rendering)
> database as a single linestring midway between the two OSM ways?

We had a student at Geofabrik working on a programme to conflate
multiple parallel line strings of roads and railways as part of his
diploma thesis.

Author: Arne Johanessen
Title: Algorithmen zur automatisierten Generalisierung durch
Zusammenfassung von Linienzügen in OpenStreetMap für konkrete Spezialfälle
(translated title: Algorithms for automatic generalisation by conflation
of linestrings in OpenStreetMap for specific special cases)
Year: 2018

Full text PDF (German) is available at
http://www.geofabrik.de/media/2018-03-02-johannessen-diplomarbeit-generalisierung.pdf

The source code is available at
https://github.com/johannessen/combiner
The software is licensed under BSD 3-clause license.

Best regards

Michael

-- 
Michael Reichert      www.geofabrik.de
Geofabrik GmbH        Handelsregister: HRB Mannheim 703657
Amalienstr. 44        Geschaeftsfuehrung: C. Karch, F. Ramm
76133 Karlsruhe       Tel: 0721-1803560-3
reichert at geofabrik.de Fax: 0721-1803560-9

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