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Read from proj:code if present #262 #264

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Read from proj:code if present #262 #264

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14 changes: 12 additions & 2 deletions stackstac/prepare.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,16 @@
[("url", object), ("bounds", "float64", 4), ("scale_offset", "float64", 2)]
)

def get_crs(item, default = None) -> Optional[int]:
props = item.get("properties", {})
crs = props.get("proj:code")
if isinstance(crs, str) and crs.startswith("EPSG:"):
crs = int(crs.split(":")[1])
else:
crs = props.get("proj:epsg")
if crs is None:
crs = default
return crs

class Mimetype(NamedTuple):
type: str
Expand Down Expand Up @@ -131,7 +141,7 @@ def prepare_items(
raise ValueError("Zero asset IDs requested")

for item_i, item in enumerate(items):
item_epsg = item["properties"].get("proj:epsg")
item_epsg = get_crs(item)
item_bbox = item["properties"].get("proj:bbox")
item_shape = item["properties"].get("proj:shape")
item_transform = item["properties"].get("proj:transform")
Expand All @@ -143,7 +153,7 @@ def prepare_items(
except KeyError:
continue

asset_epsg = asset.get("proj:epsg", item_epsg)
asset_epsg = get_crs(asset, item_epsg)
asset_bbox = asset.get("proj:bbox", item_bbox)
asset_shape = asset.get("proj:shape", item_shape)
asset_transform = asset.get("proj:transform", item_transform)
Expand Down