def get_bbox():
"""
Get bbbox of observations
.. :quickref: Synthese;
Parameters
-----------
id_dataset: int: (query parameter)
Returns
-------
bbox: `geojson`:
the bounding box in geojson
"""
params = request.args
query = DB.session.query(func.ST_AsGeoJSON(func.ST_Extent(Synthese.the_geom_4326)))
if "id_dataset" in params:
query = query.filter(Synthese.id_dataset == params["id_dataset"])
data = query.one()
if data and data[0]:
return json.loads(data[0])
return None
def get_collection_extent(collection_id):
"""Retrive the extent as a BBOX for a given collection.
:param collection_id: collection identifier
:type collection_id: str
:return: list of coordinates for the collection extent
:rtype: list
"""
extent = (session.query(func.ST_Extent(Item.geom).label("bbox")).filter(
Collection.id == Item.collection_id,
Collection.id == collection_id).first())
bbox = list()
if extent.bbox:
bbox = extent.bbox[extent.bbox.find("(") +
1:extent.bbox.find(")")].replace(" ", ",")
bbox = [float(coord) for coord in bbox.split(",")]
return bbox