Calculate MultiPolygon area

[adnanefouam]

i have this Geojson object and when i calculate the area it gives me 0 zero

"batiments": [
{
"geometry": {
"coordinates": [
[
[
[
4.9834812,
43.5107891
],
[
4.9834937,
43.5108029
],
[
4.983268,
43.5109173
],
[
4.982924,
43.5114307
],
[
4.9829033,
43.5114233
],
[
4.9832474,
43.5109059
],
[
4.9834812,
43.5107891
]
]
]
],
"type": "MultiPolygon"
},
"properties": {
"commune": "13047",
"created": "2004-11-04",
"type": "02",
"updated": "2018-06-11"
},
"type": "Feature"
},
{
"geometry": {
"coordinates": [
[
[
[
4.9834937,
43.5108029
],
[
4.9835718,
43.5108904
],
[
4.9833791,
43.5109865
],
[
4.9830492,
43.5114754
],
[
4.982924,
43.5114307
],
[
4.983268,
43.5109173
],
[
4.9834937,
43.5108029
]
]
]
],
"type": "MultiPolygon"
},
"properties": {
"commune": "13047",
"created": "2004-11-04",
"type": "01",
"updated": "2018-06-11"
},
"type": "Feature"
}
],