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Merged
cholmes merged 1 commit into from
Jun 1, 2020
Merged

Removed section on eo:bands references #827

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113 changes: 1 addition & 112 deletions extensions/eo/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -72,118 +72,7 @@ numbers of several popular instruments.
| lwir11 | 10.5 - 11.5 | | 10 | | 31 |
| lwir12 | 11.5 - 12.5 | | 11 | | 32 |

The difference between the `nir`, `nir08`, and `nir09` bands are that the `nir` band is a wider band that covers most of the spectral range of 0.75μm to 1.0μm. `nir08` and `nir09` are narrow bands centered 0.85μm and 0.95μm respectively. The same goes for the difference between `lwir`, `lwir11` and `lwir12`.

## Associating assets with bands

Asset definitions that contain band data should reference the band index. Each asset should provide a `eo:bands` property that is an array of 0 based indexes to the correct [Band Objects](#band-object).

### Item [`Asset Object`](../../item-spec/item-spec.md#asset-object) fields
| Field Name | Type | Description |
| ---------- | --------- | -------------------------------------------- |
| eo:bands | \[number] | Lists the band names available in the asset. |

See [example-landsat8.json](examples/example-landsat8.json) for a full example.

```js
{
"stac_version": "1.0.0-beta.1",
"stac_extensions": ["eo"],
"id": "LC08_L1TP_107018_20181001_20181001_01_RT",
"type": "Feature",
...
"properties": {
...
"eo:bands": [
{
"name": "B1",
"common_name": "coastal",
"center_wavelength": 0.44,
"full_width_half_max": 0.02
},
{
"name": "B2",
"common_name": "blue",
"center_wavelength": 0.48,
"full_width_half_max": 0.06
},
{
"name": "B3",
"common_name": "green",
"center_wavelength": 0.56,
"full_width_half_max": 0.06
},
...
]
},
"assets": {
"B1": {
"href": "https://landsat-pds.s3.amazonaws.com/c1/L8/107/018/LC08_L1TP_107018_20181001_20181001_01_RT/LC08_L1TP_107018_20181001_20181001_01_RT_B1.TIF",
"type": "image/tiff; application=geotiff",
"eo:bands": [0],
"title": "Band 1 (coastal)"
},
"B2": {
"href": "https://landsat-pds.s3.amazonaws.com/c1/L8/107/018/LC08_L1TP_107018_20181001_20181001_01_RT/LC08_L1TP_107018_20181001_20181001_01_RT_B2.TIF",
"type": "image/tiff; application=geotiff",
"eo:bands": [1],
"title": "Band 2 (blue)"
},
"B3": {
"href": "https://landsat-pds.s3.amazonaws.com/c1/L8/107/018/LC08_L1TP_107018_20181001_20181001_01_RT/LC08_L1TP_107018_20181001_20181001_01_RT_B3.TIF",
"type": "image/tiff; application=geotiff",
"eo:bands": [2],
"title": "Band 3 (green)"
},
...
}
}
```

Planet example:

```js
{
"stac_version": "1.0.0-beta.1",
"stac_extensions": ["eo"],
"id": "20171110_121030_1013",
"type": "Feature",
...
"properties": {
...
"eo:bands": [
{
"full_width_half_max": 0.08,
"center_wavelength": 0.63,
"common_name": "red"
},
{
"full_width_half_max": 0.09,
"center_wavelength": 0.545,
"common_name": "green"
},
{
"full_width_half_max": 0.06,
"center_wavelength": 0.485,
"common_name": "blue"
},
{
"full_width_half_max": 0.08,
"center_wavelength": 0.82,
"common_name": "nir"
}
]
},
"assets": {
"analytic": {
"href": "https://api.planet.com/data/v1/assets/eyJpIjogIjIwMTcxMTEwXzEyMTAxMF8xMDEzIiwgImMiOiAiUFNTY2VuZTRCYW5kIiwgInQiOiAiYW5hbHl0aWMiLCAiY3QiOiAiaXRlbS10eXBlIn0",
"title": "PSScene4Band GeoTIFF (COG)",
"type": "image/tiff; application=geotiff; profile=cloud-optimized",
"eo:bands": [0,1,2,3]
}
}
}
```
The difference between the `nir`, `nir08`, and `nir09` bands are that the `nir` band is a wider band that covers most of the spectral range of 0.75μm to 1.0μm. `nir08` and `nir09` are narrow bands centered 0.85μm and 0.95μm respectively. The same goes for the difference between `lwir`, `lwir11` and `lwir12`.

## Implementations

Expand Down