From a7ffe3e992a76ac2461d19c1795bb7a283cd0d4d Mon Sep 17 00:00:00 2001
From: Matthew Hanson <matt.a.hanson@gmail.com>
Date: Sun, 24 Jan 2021 23:13:03 -0500
Subject: [PATCH 1/5] allow reading in of ItemCollection without collection,
 resolves #65

---
 CHANGELOG.md              | 5 +++++
 satstac/itemcollection.py | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c71866..5a6749c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [v0.4.1] - 2021-01-24
+
+### Changed
+- Allow reading in of ItemCollections without collections
+
 ## [v0.4.0] - 2020-06-11
 
 ### Added
diff --git a/satstac/itemcollection.py b/satstac/itemcollection.py
index 25cf48e..2ffc74d 100644
--- a/satstac/itemcollection.py
+++ b/satstac/itemcollection.py
@@ -55,7 +55,7 @@ def open(cls, filename):
                 data = json.loads(data)
             else:
                 raise STACError('%s does not exist locally' % filename)
-        collections = [Collection(col) for col in data['collections']]
+        collections = [Collection(col) for col in data.get('collections', [])]
         items = [Item(feature) for feature in data['features']]
         return cls(items, collections=collections)
 

From 11bd3ae4a6654ca7d17e54f26153db990b1de09d Mon Sep 17 00:00:00 2001
From: Matthew Hanson <matt.a.hanson@gmail.com>
Date: Sun, 24 Jan 2021 23:16:07 -0500
Subject: [PATCH 2/5] updated changelog

---
 CHANGELOG.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a6749c..139fe34 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [v0.4.1] - 2021-01-24
 
+### Added
+- User can now provide custom headers to download function
+
 ### Changed
 - Allow reading in of ItemCollections without collections
 

From b428b529d7bc894756c6bd4753eea9d05189aec6 Mon Sep 17 00:00:00 2001
From: Matthew Hanson <matt.a.hanson@gmail.com>
Date: Mon, 25 Jan 2021 00:00:11 -0500
Subject: [PATCH 3/5] update default STAC_VERSION

---
 satstac/catalog.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/satstac/catalog.py b/satstac/catalog.py
index 28f95e7..12a95c7 100644
--- a/satstac/catalog.py
+++ b/satstac/catalog.py
@@ -4,7 +4,7 @@
 from .version import __version__
 from .thing import Thing, STACError
 
-STAC_VERSION = os.getenv('STAC_VERSION', '1.0.0-beta.1')
+STAC_VERSION = os.getenv('STAC_VERSION', '1.0.0-beta.2')
 
 
 class Catalog(Thing):

From 27f7356b71f3d30d0d4dafcf06711e67006b463a Mon Sep 17 00:00:00 2001
From: Matthew Hanson <matt.a.hanson@gmail.com>
Date: Mon, 25 Jan 2021 00:00:33 -0500
Subject: [PATCH 4/5] add missing fields to saved itemcollection, add id and
 description keywords

---
 satstac/itemcollection.py | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/satstac/itemcollection.py b/satstac/itemcollection.py
index 2ffc74d..125397c 100644
--- a/satstac/itemcollection.py
+++ b/satstac/itemcollection.py
@@ -3,6 +3,7 @@
 import requests
 
 from logging import getLogger
+from .catalog import STAC_VERSION
 from .collection import Collection
 from .item import Item
 from .thing import STACError
@@ -129,18 +130,23 @@ def assets_definition(self):
                 txt += ''.join([f"{vals[i]:{w[i]}}" for i in range(len(w))]) + '\n'
         return txt
 
-    def save(self, filename):
+    def save(self, filename, **kwargs):
         """ Save scene metadata """
         with open(filename, 'w') as f:
-            f.write(json.dumps(self.geojson()))
+            f.write(json.dumps(self.geojson(**kwargs)))
 
-    def geojson(self):
+    def geojson(self, id='STAC', description='Single file STAC'):
         """ Get Items as GeoJSON FeatureCollection """
         features = [s._data for s in self._items]
         geoj = {
+            'id': id,
+            'description': description,
+            'stac_version': STAC_VERSION,
+            'stac_extensions': ['single-file-stac'],
             'type': 'FeatureCollection',
             'features': features,
             'collections': [c._data for c in self._collections],
+            'links': []
         }
         return geoj
 

From ffd61e557a0cecab57368483f1125ad2ea95e84d Mon Sep 17 00:00:00 2001
From: Matthew Hanson <matt.a.hanson@gmail.com>
Date: Mon, 25 Jan 2021 00:00:49 -0500
Subject: [PATCH 5/5] update CHANGELOG and bump version

---
 CHANGELOG.md       | 5 +++++
 satstac/version.py | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 139fe34..e7001e8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,9 +10,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Added
 - User can now provide custom headers to download function
+- `id` and `description` keywords added to itemcollection.save() and itemcollection.geojson() for user to supply values to save single file STAC
 
 ### Changed
 - Allow reading in of ItemCollections without collections
+- Default STAC_VERSION updated to 1.0.0-beta.2
+
+### Fixed
+- Saved ItemCollections now adhere to STAC single-file-stac spec
 
 ## [v0.4.0] - 2020-06-11
 
diff --git a/satstac/version.py b/satstac/version.py
index abeeedb..f0ede3d 100644
--- a/satstac/version.py
+++ b/satstac/version.py
@@ -1 +1 @@
-__version__ = '0.4.0'
+__version__ = '0.4.1'