kartograph svg map is empty when using “polygons” bounds mode

[rccc]

I 'm trying to generate svg maps from the GEOFLA shapefiles ( files are listed in the "Téléchargements" tab ).

Using 'bbox' bounds mode with manually setting the bbox values works well :

{
    "layers": [{
        "id": "depts", 
        "src": "data/DEPARTEMENTS/DEPARTEMENT.shp",
        "filter": {"CODE_REG": "24"},
        "simplify": {
            "method": "distance",
            "tolerance": 8
        },
        "attributes": "all"
    }],
    "bounds": {
        "mode": "bbox",
        "data": [-4.5, 42, 8, 48],
    },
    "export": {
       "width": 600,
       "ratio": 0.8
    }
}

But when setting the bounds mode to 'polygons', then i get an empty svg map :

{
    "layers": [{
        "id": "depts", 
        "src": "data/DEPARTEMENTS/DEPARTEMENT.shp",
        "filter": {"CODE_REG": "24"},
        "simplify": {
            "method": "distance",
            "tolerance": 8
        },
        "attributes": "all"
    }],
    "bounds": {
        "mode": "polygons",
        "data": {
            "layer": "depts"
        },
        "padding": 0.06
    },
    "export": {
       "width": 600,
       "ratio": 0.8
    }
}

I had a look in kartograph files and i noticed that the "get_features" method in "map.py" return a Polygon which coordinates doesn't intersect with the features geometry previouly extracted from the shapefile.

Then, each feature are throw away in the "get_features" method of the "maplayer.py" file when checking if feature geometry intersects with the "layer.map.view_poly" property.