View In:
ArcGIS Online Map Viewer
Name: Zones d'aléa mouvement de terrain
Display Field: lb_classe
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: <DIV STYLE="text-align:Left;font-size:12pt"><P STYLE="margin:0 0 0 0;"><SPAN>Le glissement de terrain est un des deux types de mouvements de terrain considérés et cartographiés à Mayotte. Il s'agit d'un mouvement gravitaire d'un volume de sol meuble sur une pente et pouvant mobiliser quelques m³ à plusieurs centaines de milliers de m³. Ces phénomènes peuvent être rapides ou lents, les terrassements, la présence d'eau et les séismes peuvent être des éléments déclencheurs de ces glissements.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>Cette couche est la somme des couches l_zone_alea_mvt_atlas_s_976 (atlas des risques) et l_alea_mvt_pprn_s_976. En effet, chacune de ces couches couvre une partie du territoire de Mayotte comme on peut le voir sur la couche l_ppr_avancement2_s_976. Dans le cadre du visualiseur AIL (Information acquéreur locataire), il était nécessaire d'avoir une couche des aléas mouvements de terrain unique sur l'ensemble de l'île. Aussi, la méthodologie pour l'identification des risques est hétérogène sur cette couche.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P></DIV>
Service Item Id: 78ae23f2412446d59ca88cda9efd09c5
Copyright Text: DEALM Mayotte
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