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import json
import numpy as np
import pyproj
def get_metadata(item):
metadata = item["metadata"]
if isinstance(metadata, str):
metadata = json.loads(metadata)
return metadata
def lat_lon_mid_pixel(item, subset: str):
metadata = get_metadata(item)
if subset == "satellogic":
crs = metadata["crs"][0]
bounds_crs = metadata["bounds"]
elif subset == "sentinel_1":
crs = metadata["crs"]
bounds_crs = metadata["coordinates"][0]
assert len(bounds_crs) == 5
# bounds are a polygon with same first & last vertex
bounds_crs = (
bounds_crs[0][0],
bounds_crs[0][1],
bounds_crs[2][0],
bounds_crs[2][1],
)
elif subset == "neon":
crs = metadata["epsg"]
bounds_crs = metadata["bounds"]
else:
raise ValueError("subset not known")
bounds = pyproj.Transformer.from_crs(crs, "EPSG:4326").transform_bounds(*bounds_crs)
# dumb average for now
return np.array([bounds[0] + bounds[2], bounds[1] + bounds[3]]) / 2
def get_google_map_link(item, subset: str):
lat, lon = lat_lon_mid_pixel(item, subset)
return f"https://www.google.com/maps?ll={lat},{lon}&z=16&t=k"
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