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pystac.extensions.sat — pystac 1.13.0 documentation

Implements the Satellite Extension.

class pystac.extensions.sat.AssetSatExtension(asset: Asset)[source]#

A concrete implementation of SatExtension on an Asset that extends the properties of the Asset to include properties defined in the Satellite Extension.

This class should generally not be instantiated directly. Instead, call SatExtension.ext() on an Asset to extend it.

additional_read_properties: Iterable[dict[str, Any]] | None = None#

If present, this will be a list containing 1 dictionary representing the properties of the owning Item.

asset_href: str#

The href value of the Asset being extended.

properties: dict[str, Any]#

The Asset fields, including extension properties.

class pystac.extensions.sat.ItemAssetsSatExtension(item_asset: ItemAssetDefinition)[source]#

asset_defn: ItemAssetDefinition#

properties: dict[str, Any]#

The properties that this extension wraps.

The extension which implements PropertiesExtension can use _get_property and _set_property to get and set values on this instance. Note that _set_properties mutates the properties directly.

class pystac.extensions.sat.ItemSatExtension(item: Item)[source]#

A concrete implementation of SatExtension on an Item that extends the properties of the Item to include properties defined in the Satellite Extension.

This class should generally not be instantiated directly. Instead, call SatExtension.ext() on an Item to extend it.

item: Item#

The Item being extended.

properties: dict[str, Any]#

The Item properties, including extension properties.

class pystac.extensions.sat.OrbitState(value)[source]#

An enumeration.

ASCENDING = 'ascending'#

DESCENDING = 'descending'#

GEOSTATIONARY = 'geostationary'#

class pystac.extensions.sat.SatExtension[source]#

An abstract class that can be used to extend the properties of an Item or Asset with properties from the Satellite Extension. This class is generic over the type of STAC Object to be extended (e.g. Item, Collection).

To create a concrete instance of SatExtension, use the SatExtension.ext() method. For example:

>>> item: pystac.Item = ...
>>> sat_ext = SatExtension.ext(item)

property absolute_orbit: int | None#

Get or sets a absolute orbit number of the item.

property anx_datetime: datetime | None#

apply(orbit_state: OrbitState | None = None, relative_orbit: int | None = None, absolute_orbit: int | None = None, platform_international_designator: str | None = None, anx_datetime: datetime | None = None) → None[source]#

Applies ext extension properties to the extended Item or class:~pystac.Asset.

Must specify at least one of orbit_state or relative_orbit in order for the sat extension to properties to be valid.

Parameters:

• orbit_state – Optional state of the orbit. Either ascending or descending for polar orbiting satellites, or geostationary for geosynchronous satellites.

• relative_orbit – Optional non-negative integer of the orbit number at the time of acquisition.

classmethod ext(obj: T, add_if_missing: bool = False) → SatExtension[T][source]#

Extends the given STAC Object with properties from the Satellite Extension.

This extension can be applied to instances of Item or Asset.

Raises:

pystac.ExtensionTypeError – If an invalid object type is passed.

classmethod get_schema_uri() → str[source]#

Gets the schema URI associated with this extension.

name: Literal['sat'] = 'sat'#

property orbit_state: OrbitState | None#

Get or sets an orbit state of the object.

property platform_international_designator: str | None#

Gets or sets the International Designator, also known as COSPAR ID, and NSSDCA ID.

property relative_orbit: int | None#

Get or sets a relative orbit number of the item.

classmethod summaries(obj: Collection, add_if_missing: bool = False) → SummariesSatExtension[source]#

Returns the extended summaries object for the given collection.

class pystac.extensions.sat.SatExtensionHooks[source]#

prev_extension_ids = {'sat'}#

schema_uri: str = 'https://stac-extensions.github.io/sat/v1.0.0/schema.json'#

stac_object_types = {'Feature'}#

class pystac.extensions.sat.SummariesSatExtension(collection: Collection)[source]#

A concrete implementation of SummariesExtension that extends the summaries field of a Collection to include properties defined in the Satellite Extension.

property absolute_orbit: RangeSummary[int] | None#

property anx_datetime: RangeSummary[datetime] | None#

property orbit_state: list[OrbitState] | None#

Get or sets the summary of SatExtension.orbit_state values for this Collection.

property platform_international_designator: list[str] | None#

Get or sets the summary of SatExtension.platform_international_designator values for this Collection.

property relative_orbit: RangeSummary[int] | None#

class pystac.extensions.sat.T#

Generalized version of Item, Asset or ItemAssetDefinition

alias of TypeVar(‘T’, ~pystac.item.Item, ~pystac.asset.Asset, ~pystac.item_assets.ItemAssetDefinition)

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