Antananarivo - Madagascar - 2022, Land use reference spatial database

This reference database in vector format (ESRI shape format) is organized according to a multi-level nomenclature. It is used to train an image classification algorithm in order to produce land cover maps of the Antananarivo metropolitan area (see dataverse sheets describing these maps). In order to simplify the work we chose to update the database produced in 2017 and described in: Dupuy et all, 2020 (doi.org). All polygons were verified by photo-interpretation of the Pleiades image acquired on April 3, 2022. GPS points were collected to update some classes and take into account changes since 2017. Each GPS point was converted into a polygon by digitizing the boundaries of the corresponding parcel on a Pleiades image (pixel size of 0.5 m * 0.5 m). These polygons cover the entire study area in order to have a representative view of the existing crop types and urban structures. The final database contains 3113 polygons. Warning, since December 5, 2022 we publish a new version to limit the effects related to flooding (the wetland class was overestimated on the previous version of land cover map).