SkySatCollect

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
_permissions Assets available for the item which the authenticated user has permission to download. array
geometry Geographic boundary of the item's footprint, formatted as a GeoJSON polygon. json
id Globally unique item identifier. string
acquired Timestamp that the item was captured. datetime
clear_confidence_percent percentage value: per-pixel algorithmic confidence in 'clear' classification int [0-100]
clear_percent Percent of clear values in dataset. Clear values represents scene content areas (non-blackfilled) that are deemed to be not impacted by cloud, haze, shadow and/or snow. int [0-100]
cloud_cover Average percentage of cloud coverage. double
cloud_percent Percent of cloud values in dataset. Cloud values represent scene content areas (non-blackfilled) that contain opaque clouds which prevent reliable interpretation of the land cover content. int [0-100]
ground_control_ratio Ratio of individual scenes that are successfully rectified. double
gsd Ground sample distance - the distance between pixel centers as measured on the ground in meters. double
heavy_haze_percent Percent of heavy haze values in dataset. Heavy haze values represent scene content areas (non-blackfilled) that contain thin low altitude clouds, higher altitude cirrus clouds, soot and dust which allow fair recognition of land cover features, but not having reliable interpretation of the radiometry or surface reflectance. int [0-100]
item_type Name of the item type. string
light_haze_percent Percent of light haze values in dataset. Light haze values represent scene content areas (non-blackfilled) that contain thin low altitude clouds, higher altitude cirrus clouds, soot and dust which allow reliable recognition of land cover features, and have up to +/-10% uncertainty on commonly used indices (EVI and NDWI). int [0-100]
pixel_resolution Pixel resolution of the imagery in meters. double
provider Name of the item provider (e.g. “planetscope”, ”rapideye”). string
published Timestamp that the item was published to the Planet API. datetime
publishing_stage Stage of publishing for an item. SkySatCollect items will be first published and remain in "finalized" stage. string
quality_category Metric for image quality. To qualify for “standard” image quality an image must meet a variety of quality standards, for example: sun altitude greater than or equal to 10 degrees, off nadir view angle less than 20 degrees, and saturated pixels fewer than 20%. If the image does not meet these criteria it is considered “test” quality. string
satellite_azimuth Angle from true north to the satellite vector at the time of imaging, averaged across the full SkySatCollect, projected on the horizontal plane in degrees (0 - 360). double
satellite_id Globally unique satellite identifier. string
shadow_percent Percent of shadow values in dataset. Shadow values represent scene content areas (non-blackfilled) that are not fully exposed to the solar illumination as a result of atmospheric transmission losses due to cloud, haze, soot and dust, and therefore do not allow for reliable interpretation of the radiometry or surface reflectance. int [0-100]
snow_ice_percent Percent of snow and ice values in dataset. Snow_ice values represent scene content areas (non-blackfilled) that are hidden below snow and/or ice. int [0-100]
strip_id The unique identifier of the image stripe that the item came from. string
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
updated Timestamp that the item record was last updated. datetime
view_angle The satellite's across-track, off-nadir viewing angle. Positive numbers denote east, negative numbers denote west (-25 - +25). double
visible_confidence_percent Visible values represent the fraction of the scene content (excluding the portion of the image which contains blackfill) which is comprised of clear, light haze, shadow, snow/ice categories, and is given as a percentage ranging from zero to one hundred. int [0-100]
visible_percent Average of confidence percent for clear_percent, light_haze_percent, shadow_percent and snow_ice_percent int [0-100]

Available Asset Types

Asset Name Description
ortho_analytic Radiometrically calibrated GeoTiff suitable for analytic 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_analytic_udm2 Orthorectified usable data mask (Cloud 2.0)
ortho_panchromatic Orthorectified Radiometrically-calibrated panchromatic image stored as 16-bit scaled radiance
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_udm2 Orthorectified usable data mask (Cloud 2.0)
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_pansharpened_udm2 Orthorectified usable data mask (Cloud 2.0)
ortho_visual Color corrected GeoTiff for visual applications.