[OSM-talk-be] the state of OpenStreetmap in Antwerpen

[Luc Van den Troost]

As I needed to extract all the streets from Antwerpen from the OSM
database (needed for a custom streetfinder - see previous mail), I
wanted to compare the list of streets with the 'official streetname
list' of Antwerpen. 


The official streetname list is an official and open document. It is
presented on the city of Antwerpen website as a PDF document. 


Antwerpen has something over 3000 streets. I didn't want to compare them
manualy and decided this was something for a computer to do...


I converted the PDF document to a TXT document, and had a simple perl
script extracting all the streetnames and postcodes. 


Most of the streets are converted fine, some got corrupted trough the
whole process. This is particularly the case for streetnames having
signs with a 'trema' (ë ü ï) in it. 


I had a script comparing the streetnames from the official list with the
names from the OSM database. 


This is the summarized result:


postcode


description


number of
streets


missing or
incorrect


% done


2000


centrum


437


40


91


2018


zuid + Berchem


233


48


79


2020


Kiel


144


68


53


2030


Luchtbal


236


175


26


2040


Stabroek


151


135


11


2050


Linkeroever


95


79


17


2060


A'pen noord


201


90


55


2100


Deurne


288


103


64


2140


Borgerhout


211


61


71


2170


Merksem


250


220


12


2180


Ekeren


165


101


39


2600


Berchem


242


14


94


2610


Wilrijk


302


174


42


2660


Hoboken


239


151


37




Some remarks on 'wrong results':


Streets falsely marked: streets that come out of the official list with
'extra descriptions' like 'pair numbers' or 'nr. 75 to 85'; streets that
are still in the official streetlist but are no real streets
(Falcompoort, is just a – closed – gate) or are disappeared (4 streets
now occupied by the MAS building warf), also some streets containing
special characters like d'Herbouville. 


Streets falsely not marked:

our script will do a lookup of every street from the official list in
the OSM database. If the street is found within the OSM name it will not
appear. For instance Meir would also match 'Meirbrug'. If meir would not
be on the map, it would not be displayed. 

If a long street is mapped in different parts, and one part is named
correctly, the name will not appear in the list. 


The list of 'missing' streetnames, with postcode, is available in CSV
file on 


http://www.bb2000.be/stratenzoeker/vergelijkstraten.csv

This is based on the streets available in openstreetmap on 2nd of august
2008.

I'll try to make an updated list something like monthly... 

Who is doing mapping in Antwerpen, and knows some streets, might have a
look at the list. 
Streets on this list are (either)
- misspelled
- tagged with wrong name
- unnamed
- missing

Unless something went wrong with the transformations. 

Luc.