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   "description": "Maillage de 2 km x 2 km décrivant les informations sur les fichiers images des orthophotos 1978 - 1990 du Service public de Wallonie.\nLe Service public de Wallonie (SPW) produit régulièrement des vues aériennes du territoire wallon sous forme d\u2019orthophotos. Ces orthophotos sont accompagnées de deux géodonnées : le tuilage et le maillage. Le maillage des orthophotos est un découpage de la Wallonie en mailles de 2 km x 2 km de côté ayant comme origine la coordonnée (0,0). Il est propre au Service public de Wallonie. Des données attributaires sont associées à chaque maille du maillage. Les orthophotos sont disponibles, entre autres, sous forme d\u2019images (au format Geotiff, pour les plus récentes) de la dimension d\u2019une maille.\nL\u2019ensemble des fichiers images appartenant à une feuille IGN au 1/50 000 est groupé dans un même dossier portant le numéro de la feuille.\nL\u2019utilité principale des mailles est de faciliter la recherche d\u2019un fichier image donné au sein de l\u2019arborescence du disque en permettant d\u2019identifier le nom de la maille (et donc du fichier image) et de la feuille (et donc du dossier contenant le fichier) sur base d\u2019une vue cartographique.\nBien que les attributs des mailles comportent une information approximative sur la date de prise de vue, l\u2019utilisateur intéressé par une information complète et détaillée sur ce sujet est invité à consulter les données attributaires des tuiles.\nConsultez les métadonnées sur :http://geoportail.wallonie.be/catalogue/b3de64d0-df05-46fb-9f88-ad0e2591204a.html",
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