remove thumbnail asset hrefing preview.jpg as this asset is not alway…

CHANGELOG.MD

@@ -30,6 +30,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - pystac >= 1.9.0 is now required
 - Names in eo:bands structure are now S2 band names, not common name ([#139](https://github.com/stactools-packages/sentinel2/pull/139))
 - PVI asset role changed from "thumbnail" or "visual" to "overview" ([#143](https://github.com/stactools-packages/sentinel2/pull/143))
+- Removed asset "thumbnail" pointing to preview.jpg asset, as this file frequently
+  does not exit. ([#144](https://github.com/stactools-packages/sentinel2/pull/144))
 
 ### Removed
 

src/stactools/sentinel2/constants.py

@@ -171,7 +171,6 @@
 }
 
 L2A_IMAGE_PATHS: Final[list[str]] = [
-    "preview.jpg",
     "R10m/B04.jp2",
     "R10m/B03.jp2",
     "R10m/B02.jp2",
@@ -215,7 +214,6 @@
 ]
 
 L1C_IMAGE_PATHS: Final[list[str]] = [
-    "preview.jpg",
     "B01.jp2",
     "B02.jp2",
     "B03.jp2",

src/stactools/sentinel2/stac.py

@@ -61,7 +61,6 @@
 SCL_PATTERN: Final[Pattern[str]] = re.compile(r"[_/]SCL[_.]")
 CLD_PATTERN: Final[Pattern[str]] = re.compile(r"[_/]CLD[_.]")
 SNW_PATTERN: Final[Pattern[str]] = re.compile(r"[_/]SNW[_.]")
-THUMBNAIL_PATTERN: Final[Pattern[str]] = re.compile(r"[_/]preview[_.]")
 
 BAND_PATTERN: Final[Pattern[str]] = re.compile(r"[_/](B\w{2})")
 IS_TCI_PATTERN: Final[Pattern[str]] = re.compile(r"[_/]TCI")
@@ -271,7 +270,6 @@ def image_asset_from_href(
             raise Exception(f"Must supply a media type for asset : {asset_href}")
 
     # Handle preview image
-
     if "_PVI" in asset_href:
         asset = pystac.Asset(
             href=asset_href,
@@ -283,16 +281,6 @@ def image_asset_from_href(
         asset_eo.bands = RGB_BANDS
         return "preview", asset
 
-    elif THUMBNAIL_PATTERN.search(asset_href):
-        # thumbnail image
-        asset = pystac.Asset(
-            href=asset_href,
-            media_type=pystac.MediaType.JPEG,
-            title="Thumbnail image",
-            roles=["thumbnail"],
-        )
-        return "thumbnail", asset
-
     # Extract gsd and proj info
     resolution = extract_gsd(asset_href)
     if resolution is None:

tests/data-files/S2A_OPER_MSI_L1C_TL_SGS__20181231T203637_A018414_T10SDG/expected_output.json

@@ -74,14 +74,6 @@
     }
   ],
   "assets": {
-    "thumbnail": {
-      "href": "./preview.jpg",
-      "type": "image/jpeg",
-      "title": "Thumbnail image",
-      "roles": [
-        "thumbnail"
-      ]
-    },
     "coastal": {
       "href": "./B01.jp2",
       "type": "image/jp2",

tests/data-files/S2A_OPER_MSI_L2A_TL_SGS__20181231T210250_A018414_T10SDG/expected_output.json

@@ -86,14 +86,6 @@
     }
   ],
   "assets": {
-    "thumbnail": {
-      "href": "./preview.jpg",
-      "type": "image/jpeg",
-      "title": "Thumbnail image",
-      "roles": [
-        "thumbnail"
-      ]
-    },
     "red": {
       "href": "./R10m/B04.jp2",
       "type": "image/jp2",

tests/data-files/S2A_OPER_MSI_L2A_TL_VGS1_20220401T110010_A035382_T34LBP/expected_output.json

@@ -86,14 +86,6 @@
     }
   ],
   "assets": {
-    "thumbnail": {
-      "href": "./preview.jpg",
-      "type": "image/jpeg",
-      "title": "Thumbnail image",
-      "roles": [
-        "thumbnail"
-      ]
-    },
     "red": {
       "href": "./R10m/B04.jp2",
       "type": "image/jp2",

tests/data-files/S2A_OPER_MSI_L2A_TL_VGS1_20220401T110010_A035382_T34LBQ/expected_output.json

@@ -92,14 +92,6 @@
     }
   ],
   "assets": {
-    "thumbnail": {
-      "href": "./preview.jpg",
-      "type": "image/jpeg",
-      "title": "Thumbnail image",
-      "roles": [
-        "thumbnail"
-      ]
-    },
     "red": {
       "href": "./R10m/B04.jp2",
       "type": "image/jp2",