The SkySat Collect product is an orthorectified composite of SkySat scenes from a SkySat collection.
Products Overview
A typical SkySat collect ranges from approximately 50-70 SkySat scenes and contains 4 multispectral bands, as well as the panchromatic band. This product is sensor and geometrically corrected, and is projected to a cartographic map projection. The geometric correction uses fine Digital Elevation Models (DEMs) with a post spacing of between 30 and 90 meters. Ground Control Points (GCPs) are used in the creation of every image and the accuracy of the product will vary from region to region based on available GCPs.
Item Properties
| Property Name | Description | Type |
|---|---|---|
| id | Globally unique item identifier. | string |
| _permissions | The permissions that the authenticated user has to the item. | array |
| item_type | Name of the item type. | string |
| provider | Name of the item provider (e.g. “planetscope”, ”rapideye”). | string |
| satellite_id | Globally unique satellite identifier. | string |
| strip_id | The unique identifier of the image stripe that the item came from. | string |
| geometry | Geographic boundary, formatted as a GeoJSON polygon. | json |
| cloud_cover | Average percentage of cloud coverage. | double |
| gsd | Ground sample distance - the distance between pixel centers as measured on the ground in meters. | double |
| sun_azimuth | The angle of the sun, as seen by the observer, measured clockwise from the north (0 - 360). | double |
| sun_elevation | The angle of the sun above the horizon (0 - 90). | double |
| view_angle | The satellite's across-track, off-nadir viewing angle. Positive numbers denote east, negative numbers denote west (-25 - +25). | double |
| ground_control_ratio | Ratio of individual scenes that are successfully rectified. | double |
| acquired | Timestamp that the item was captured. | datetime |
| published | Timestamp that the item was published to the Planet API. | datetime |
| updated | Timestamp that the item record was last updated. | datetime |
Available Asset Types
| Asset Name | Description |
|---|---|
| ortho_visual | Color corrected GeoTiff for visual applications. |
| ortho_analytic_dn | Non-radiometrically calibrated GeoTiff suitable for analytic applications. |
| ortho_analytic_udm | Unusable Data Mask - Unusable data bit mask in GeoTIFF format for the analytic scene assets. |
| ortho_pansharpened | Color corrected and pansharpened GeoTiff for visual applications. |
| ortho_pansharpened_udm | Unusable Data Mask - Unusable data bit mask in GeoTIFF format for the pansharpened scene assets. |
| ortho_panchromatic_dn | Basic sensor corrected panchromatic band GeoTiff. Scene based framing and not projected to a cartographic projection. |
| ortho_panchromatic_udm | Unusable Data Mask - Unusable data bit mask in GeoTIFF format for the pansharpened DN scene assets. |
| ortho_panchromatic | Orthorectified Radiometrically-calibrated panchromatic image stored as 16-bit scaled radiance |
| ortho_panchromatic_udm2 | Orthorectified usable data mask (Cloud 2.0) |
| ortho_analytic_udm2 | Orthorectified usable data mask (Cloud 2.0) |
| ortho_pansharpened_udm2 | Orthorectified usable data mask (Cloud 2.0) |