load scale and offset if present

This Merge request adds the functionality to automatically load the scale and offset values from the input datasets into the STAC Metadata directly without having the user enter them manually, if present in the datasets.

However, if these values are not present or are incorrectly written in the data metadata, the user can use the write_scale_and_offset.py script to enter the values to the datasets and Raster2STAC should be able to read the correct values directly into the metadata afterwards.

examples/stac/BD_SOILGRIDS/items/20200301000000.json

 {
     "type": "Feature",
     "stac_version": "1.0.0",
-    "id": "20240301000000",
+    "id": "20200301000000",
     "properties": {
-        "datetime": "2024-03-01T00:00:00Z"
+        "datetime": "2020-03-01T00:00:00Z"
     },
     "geometry": {
         "type": "Polygon",
@@ -45,7 +45,7 @@
         },
         {
             "rel": "self",
-            "href": "http://10.8.244.74:8082/collections/BD_SOILGRIDS/items/20240301000000",
+            "href": "http://10.8.244.74:8082/collections/BD_SOILGRIDS/items/20200301000000",
             "type": "application/json"
         },
         {
@@ -56,7 +56,7 @@
     ],
     "assets": {
         "bd_sl1": {
-            "href": "./stac/BD_SOILGRIDS/20240301000000/bd_sl1_20240301000000.tif",
+            "href": "./stac/BD_SOILGRIDS/20200301000000/bd_sl1_20200301000000.tif",
             "type": "image/tiff; application=geotiff; profile=cloud-optimized",
             "proj:epsg": 4326,
             "proj:geometry": {
@@ -148,28 +148,29 @@
                     "scale": 0.01,
                     "offset": 0.0,
                     "sampling": "area",
+                    "nodata": -32768.0,
                     "statistics": {
-                        "mean": -7243.044276281381,
-                        "minimum": -32768,
-                        "maximum": 3944,
-                        "stddev": 12923.693193303632,
-                        "valid_percent": 0.00020430177824267782
+                        "mean": 113.06354800975733,
+                        "minimum": 60,
+                        "maximum": 141,
+                        "stddev": 15.031083230767154,
+                        "valid_percent": 79.81682302562761
                     },
                     "histogram": {
                         "count": 11,
-                        "min": -32768.0,
-                        "max": 3944.0,
+                        "min": 60.0,
+                        "max": 141.0,
                         "buckets": [
-                            92325,
-                            2651,
-                            3177,
-                            3585,
-                            4695,
-                            6189,
-                            9281,
-                            15775,
-                            305625,
-                            46169
+                            189,
+                            2177,
+                            13082,
+                            30056,
+                            43150,
+                            56967,
+                            54944,
+                            76422,
+                            93976,
+                            19718
                         ]
                     }
                 }
@@ -184,7 +185,7 @@
             ]
         },
         "bd_sl2": {
-            "href": "./stac/BD_SOILGRIDS/20240301000000/bd_sl2_20240301000000.tif",
+            "href": "./stac/BD_SOILGRIDS/20200301000000/bd_sl2_20200301000000.tif",
             "type": "image/tiff; application=geotiff; profile=cloud-optimized",
             "proj:epsg": 4326,
             "proj:geometry": {
@@ -276,35 +277,36 @@
                     "scale": 0.01,
                     "offset": 0.0,
                     "sampling": "area",
+                    "nodata": -32768.0,
                     "statistics": {
-                        "mean": -7235.064522587604,
-                        "minimum": -32768,
-                        "maximum": 3954,
-                        "stddev": 12927.77463403079,
-                        "valid_percent": 0.00020430177824267782
+                        "mean": 123.3198722231181,
+                        "minimum": 72,
+                        "maximum": 157,
+                        "stddev": 14.552005154496849,
+                        "valid_percent": 79.81682302562761
                     },
                     "histogram": {
                         "count": 11,
-                        "min": -32768.0,
-                        "max": 3954.0,
+                        "min": 72.0,
+                        "max": 157.0,
                         "buckets": [
-                            92324,
-                            2652,
-                            3175,
-                            3586,
-                            4696,
-                            6189,
-                            9281,
-                            15775,
-                            305459,
-                            46335
+                            223,
+                            3129,
+                            17939,
+                            36662,
+                            54610,
+                            47308,
+                            88635,
+                            101173,
+                            38174,
+                            2828
                         ]
                     }
                 }
             ],
             "eo:bands": [
                 {
-                    "name": "bd_sl2"
+                    "name": "bd_sl1"
                 }
             ],
             "roles": [
@@ -312,7 +314,7 @@
             ]
         },
         "bd_sl3": {
-            "href": "./stac/BD_SOILGRIDS/20240301000000/bd_sl3_20240301000000.tif",
+            "href": "./stac/BD_SOILGRIDS/20200301000000/bd_sl3_20200301000000.tif",
             "type": "image/tiff; application=geotiff; profile=cloud-optimized",
             "proj:epsg": 4326,
             "proj:geometry": {
@@ -404,35 +406,36 @@
                     "scale": 0.01,
                     "offset": 0.0,
                     "sampling": "area",
+                    "nodata": -32768.0,
                     "statistics": {
-                        "mean": -7230.745174391998,
-                        "minimum": -32768,
-                        "maximum": 3958,
-                        "stddev": 12929.990325021297,
-                        "valid_percent": 0.00020430177824267782
+                        "mean": 128.8672804666723,
+                        "minimum": 86,
+                        "maximum": 160,
+                        "stddev": 13.291673704662564,
+                        "valid_percent": 79.81682302562761
                     },
                     "histogram": {
                         "count": 11,
-                        "min": -32768.0,
-                        "max": 3958.0,
+                        "min": 86.0,
+                        "max": 160.0,
                         "buckets": [
-                            92323,
-                            2652,
-                            3175,
-                            3586,
-                            4696,
-                            6185,
-                            9282,
-                            15772,
-                            305280,
-                            46521
+                            1152,
+                            8828,
+                            27664,
+                            38599,
+                            41840,
+                            57737,
+                            96440,
+                            89083,
+                            28117,
+                            1221
                         ]
                     }
                 }
             ],
             "eo:bands": [
                 {
-                    "name": "bd_sl3"
+                    "name": "bd_sl1"
                 }
             ],
             "roles": [
@@ -440,7 +443,7 @@
             ]
         },
         "bd_sl4": {
-            "href": "./stac/BD_SOILGRIDS/20240301000000/bd_sl4_20240301000000.tif",
+            "href": "./stac/BD_SOILGRIDS/20200301000000/bd_sl4_20200301000000.tif",
             "type": "image/tiff; application=geotiff; profile=cloud-optimized",
             "proj:epsg": 4326,
             "proj:geometry": {
@@ -532,35 +535,36 @@
                     "scale": 0.01,
                     "offset": 0.0,
                     "sampling": "area",
+                    "nodata": -32768.0,
                     "statistics": {
-                        "mean": -7220.713856972411,
-                        "minimum": -32768,
-                        "maximum": 3973,
-                        "stddev": 12935.234422465275,
-                        "valid_percent": 0.00020430177824267782
+                        "mean": 141.70923080467185,
+                        "minimum": 101,
+                        "maximum": 168,
+                        "stddev": 10.70779058996517,
+                        "valid_percent": 79.81682302562761
                     },
                     "histogram": {
                         "count": 11,
-                        "min": -32768.0,
-                        "max": 3973.0,
+                        "min": 101.0,
+                        "max": 168.0,
                         "buckets": [
-                            92324,
-                            2653,
-                            3176,
-                            3585,
-                            4695,
-                            6192,
-                            9284,
-                            15780,
-                            305417,
-                            46366
+                            625,
+                            2928,
+                            17072,
+                            34611,
+                            44061,
+                            51624,
+                            85206,
+                            135812,
+                            18686,
+                            56
                         ]
                     }
                 }
             ],
             "eo:bands": [
                 {
-                    "name": "bd_sl4"
+                    "name": "bd_sl1"
                 }
             ],
             "roles": [
@@ -568,7 +572,7 @@
             ]
         },
         "bd_sl5": {
-            "href": "./stac/BD_SOILGRIDS/20240301000000/bd_sl5_20240301000000.tif",
+            "href": "./stac/BD_SOILGRIDS/20200301000000/bd_sl5_20200301000000.tif",
             "type": "image/tiff; application=geotiff; profile=cloud-optimized",
             "proj:epsg": 4326,
             "proj:geometry": {
@@ -660,35 +664,36 @@
                     "scale": 0.01,
                     "offset": 0.0,
                     "sampling": "area",
+                    "nodata": -32768.0,
                     "statistics": {
-                        "mean": -7215.294163915402,
-                        "minimum": -32768,
-                        "maximum": 3983,
-                        "stddev": 12938.077252886005,
-                        "valid_percent": 0.00020430177824267782
+                        "mean": 148.6391173361387,
+                        "minimum": 110,
+                        "maximum": 176,
+                        "stddev": 8.792520440566197,
+                        "valid_percent": 79.81682302562761
                     },
                     "histogram": {
                         "count": 11,
-                        "min": -32768.0,
-                        "max": 3983.0,
+                        "min": 110.0,
+                        "max": 176.0,
                         "buckets": [
-                            92325,
-                            2652,
-                            3178,
-                            3585,
-                            4697,
-                            6194,
-                            9291,
-                            15785,
-                            305838,
-                            45927
+                            277,
+                            2768,
+                            11127,
+                            32254,
+                            39804,
+                            83651,
+                            155859,
+                            59929,
+                            4967,
+                            45
                         ]
                     }
                 }
             ],
             "eo:bands": [
                 {
-                    "name": "bd_sl5"
+                    "name": "bd_sl1"
                 }
             ],
             "roles": [
@@ -696,7 +701,7 @@
             ]
         },
         "bd_sl6": {
-            "href": "./stac/BD_SOILGRIDS/20240301000000/bd_sl6_20240301000000.tif",
+            "href": "./stac/BD_SOILGRIDS/20200301000000/bd_sl6_20200301000000.tif",
             "type": "image/tiff; application=geotiff; profile=cloud-optimized",
             "proj:epsg": 4326,
             "proj:geometry": {
@@ -788,35 +793,36 @@
                     "scale": 0.01,
                     "offset": 0.0,
                     "sampling": "area",
+                    "nodata": -32768.0,
                     "statistics": {
-                        "mean": -7213.9952377255495,
-                        "minimum": -32768,
-                        "maximum": 3983,
-                        "stddev": 12938.747506639347,
-                        "valid_percent": 0.00020430177824267782
+                        "mean": 150.30348545232556,
+                        "minimum": 112,
+                        "maximum": 175,
+                        "stddev": 8.417987391686886,
+                        "valid_percent": 79.81682302562761
                     },
                     "histogram": {
                         "count": 11,
-                        "min": -32768.0,
-                        "max": 3983.0,
+                        "min": 112.0,
+                        "max": 175.0,
                         "buckets": [
-                            92325,
-                            2652,
-                            3176,
-                            3586,
-                            4697,
-                            6194,
-                            9289,
-                            15781,
-                            305636,
-                            46136
+                            361,
+                            1887,
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+                            26976,
+                            40976,
+                            66078,
+                            149841,
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                         ]
                     }
                 }
             ],
             "eo:bands": [
                 {
-                    "name": "bd_sl6"
+                    "name": "bd_sl1"
                 }
             ],
             "roles": [