In the Planet API, an
item is an entry in our catalog, and generally
represents a single logical observation (or scene) captured by a satellite.
item is defined by an item_type, which represents the
class of spacecraft and/or processing level of the item. Assets (or
products, such as visual or analytic) can be derived from the
items have a standard (or shared) set of properties. A few examples of shared properties are:
acquired- Date-time at which the imagery was captured.
geometry- An item's physical footprint, described as GeoJSON.
published- Date-time at which this item was added to the API.
Items also have additional properties that are specific to the item_type of the item. All
items of a given
item_type share all properties with one another. Whenever possible, properties that are identically named between different
item_types will have the same schema and semantics. For example, acquired is an RFC-3339 timestamp in all items where it appears, enabling meaningful comparisons across
Planet operates the PlanetScope (PS) and RapidEye (RE) Earth-imaging constellations. Imagery is collected and processed in a variety of formats to serve different use cases, be it mapping, deep learning, disaster response, precision agriculture, or simple temporal image analytics to create rich information products.
PlanetScope satellite imagery is captured as a continuous strip of single frame images known as “scenes.” Scenes may be acquired as a single RGB (red, green, blue) frame or a split-frame with a RGB half and a NIR (near-infrared) half depending on the capability of the satellite.
Planet offers three product lines for PlanetScope imagery: a Basic Scene product, an Ortho Scene product, and an Ortho Tile product. The Basic Scene product is a scaled Top of Atmosphere Radiance (at sensor) and sensor-corrected product. The Basic Scene product is designed for users with advanced image processing and geometric correction capabilities. The product is not orthorectified or corrected for terrain distortions.Ortho Scenes represent the single-frame image captures as acquired by a PlanetScope satellite with additional post processing applied. Ortho Tiles are multiple orthorectified scenes in a single strip that have been merged and then divided according to a defined grid.
item_type represents the class of spacecraft and/or processing level of an
item. All items have an associated
item_type has a specific list of assets_types that can be derived from the
item's source data.
items within an
item_type group will have identical schemas with no nullified or optional properties. Items across
item_types may also share identical properties, and generally have the same schema and semantics to facilitating cross
item_type searching using shared properties. As an example, both
PSOrthoTile items have
black_fill properties. It can be assumed that these properties have the same meaning across both
item data is sliced in a similar manner across
item_types. For example,
PSOrthoTile items are geometrically segmented along the
RapidEye Level 3A grid.
PlanetScope items are exposed under multiple item_types
Individual PlanetScope scenes are exposed under 2 different item_types. All PlanetScope items can be found under both
PSScene4Band, each exposing different
assets_types that can be generated.
|Available Item Types||Description|
|PSScene3Band||PlanetScope 3 band scenes (red, green, blue) captured by the Dove satellite constellation|
|PSScene4Band||PlanetScope 4 band scenes (red, green, blue, near-infrared) captured by the Dove satellite constellation|
|PSOrthoTile||PlanetScope ortho tiles captured by the Dove satellite constellation|
|REOrthoTile||RapidEye OrthoTiles captured by the RapidEye satellite constellation|
|REScene||Unorthorectified strips captured by the RapidEye satellite constellation|
|SkySatScene||SkySat Scenes captured by the SkySat satellite constellation|
|SkySatCollect||Orthorectified scene composite of a SkySat ccollection|
|Landsat8L1G||Landsat8 Scenes provided by USGS Landsat8 satellite|
|Sentinel2L1C||Copernicus Sentinel-2 Scenes provided by ESA Sentinel-2 satellite|
asset describes a product that can be derived from an item's source data, and can be used for various analytic, visual or other purposes. Assets are generally either image data or metadata.
items have many
assets available for production and download, each a different representation of the same
item using different processing steps. As an example, an
item may have a visual or an analytic asset. The visual asset is intended for display, while the analytic can be used for further processing.
For a complete listing of
asset_types available for each
item_type, checkout the item type specifics in this section.