WikiProject Belgium/Mapping resources/SPW

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SPW's PICC map of Wallonia and SPW Aerial imagery with resolution < 25 cm

The PICC map is useful to use as a reference in Wallonia. Like any other map, it's not authoritarian; the ground truth always prevails. The PICC is comparable to the GRB in Flanders.

The JOSM PICC layer is available in JOSM. It will appear by default in the Imagery menu if you are viewing an area in Wallonia.

Here is a legend of the map.

PICC is made from aerial photographs with a precision better than 25 cm. They are digitalized and orthorectified. This means that errors due to the obliqueness of the photography are corrected, something which is impossible to do as an OSM'er.

Although PICC is available since 2010, the copyright status was even less clear before 2016. Wallonia was mapped with other, less accurate sources, so realignment might be desirable.

Legal Permission to use the WMS

The legal status of tracing from PICC has historically been a point of great debate. In May 2018, SPW has given us a formal permission document to allow tracing: File:OSM license for SPW WMS usage.pdf.

ICAR - Address data

The conditions and license are:

It is thus considered as "open" and usable in OSM. We have set the "ICAR address import tool" for checking between the official dataset and what is in OSM too.

PICC general access and conditions clarified in English

For the PICC, what "copying" means and what can be done by "tracing" is defined in Conditions on SPW's site.
With PICC, one can do two things:

Obtenir une copie de la donnée (get a copy of the data)

that is copying (downloading files (to be imported)) and the conditions are:

Consulter (= browsing = what OSM contributors do: tracing VIA A WEB SERVICE)

that is browsing or tracing and the conditions are:

ARCHIVES (OLD elements for history)

SPW Cartopro's clarification letter

The SPW clarified what "utilisation gratuite" (free use) of the PICC WMS server means.

Subject: RE: Utilisation du PICC pour Openstreetmap
Date: Thu, 18 Aug 2016 14:27:03 +0000
From: helpdesk.carto <>

Les utilisations que l’utilisateur peut faire sont :

  • se connecter sur le serveur du SPW et calquer le PICC afin de faire des fonds de plan (=vectoriser),
  • réutiliser à sa guise les fonds de plan (1) (commercialement ou non),
  • ne peut pas copier le PICC (2) sur ses serveurs à des fins non-commerciales, sauf autorisation préalable du SPW (les conditions particulières d’accès et d’utilisation s’appliquant aux PICC ont normalement été écrites par la Géométrologie et devraient être en ligne pour être opposables aux utilisateurs),
  • ne peut pas copier PICC (2) sur ses serveurs et les réutiliser à des fins commerciales (les revendre ou permettre à ses utilisateurs de les revendre),
  • ne peut pas, non plus, recréer le service sur ses serveurs, sauf autorisation préalable du SPW.

(1) Les fonds de plans sont le résultats de la vectorisation que vous réaliserez sur base du service.
Il s’agit là, du résultat de votre vectorisation basée sur le service du PICC.

(2) Le point relatif à la copie du PICC concerne les données vectorisées que nous distribution. Dans votre cas, cela ne vous concerne pas.

Je reste à votre disposition.

HelpDesk Carto

Département de la Géomatique

NB: in SPW's terminology, "service" means the WMS or similar server.