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Glossary


TermDefinition
AOIArea Of Interest is a polygonal region on a map defining the area where a given action is to be performed: data acquisition, data processing, etc.
AOI clippedData block output that includes only the items that either: intersect the AOI or fully contain that AOI depending on the chosen filter.
analytical productA type of image or data that can be used to infer physical properties on the features of that data. For example, using reflectance to estimate vegetation health.
blockUnit corresponding to either a data acquisition or a processing stage in a workflow.
bounding boxGeoJSON geometry represented by a rectangle that describes the area of a map. It contains an array of coordinate pairs, with the first coordinate pair indicating the southwestern corner of the box and the second indicating the northeastern corner of the box. The coordinates are specified in longitude and latitude.
capabilitiesA set of constraints in a workflow that defines what block can be connected to another block. For example, only data blocks that output SAFE files can be used as input to the SNAP polarimetric block. There are two types of capabilities: input and output. The first constraint defines which blocks can precede a given block in a workflow, while the later constraint defines which blocks can follow that given block.
consoleThe User Interface of the UP42 platform. It allows you to do all actions related with project, workflow, job as well as manage your account and credit settings.
custom blockA block that is pushed by a costumer to the UP42 docker registry and is therefore private, i.e., it can only used by that customer.
CRSCoordinate Reference System or Spatial Reference System is a coordinate-based local, regional or global system used to locate geographical entities.
cloud coverPercentage or ratio of the given individual scene or region that is fully covered by clouds as defined by a cloud mask. Different cloud masks will return different results depending on considerations on haze and cloud type.
data blockA block that provides satellite image data or other types of geospatial data.
demo projectProject that is created when a customer confirms the email address associated with his/her account. This project comes with consists of a simple workflow of a data and processing block. The workflow is also automatically instantiated (run) to provide a first job output.
full sceneData block output that includes the complete area covered by the satellite instrument when it was over that area. In this case, the selected AOI is used to search for the scene(s) that include(s) the specified AOI.
jobAn instance of a workflow.
job inputsSee job parameters.
job parametersThe JSON that includes the configuration for each block in a given workflow.
NDVINormalized Difference Vegetation Index. One of the most widespread vegetation indexes used to measure vegetation health.
EVIEnhanced Vegetation Index.
EPSGEuropean Petroleum Survey Group Geodetic Parameter Dataset (also EPSG registry) is a public registry of spatial reference systems, Earth ellipsoids, coordinate transformations and related units of measurement mantained by the International Association of Oil & Gas Producers (IOGP), formerly known as the European Petroleum Survey Group (EPSG). Each entity is assigned an EPSG code between 1024-32767 along with a standard machine-readable well-known text (WKT) representation. See more in here.
nodata maskA raster image or band frequently contains cells with NoData, which represents the absence of data. Examples: borders, cloud masks etc. NoData can either be stored as a separate raster mask or using a pixel value in the dataset that is excluded from the raster analysis. For example, -9999 and -32768 are common values for storing NoData.
UTMUniversal Transverse Mercator projection, one of the most common map projections used in cartography. A UTM zone spans 6‎° of longitude.
processing blockA block that takes input from a data block and applies a processing operation to the data.
projectA named single collection of workflows and their corresponding jobs.
restricted blockA block that has access restrictions from a commercial and/or legal perspective.
quicklookA low resolution raster file of the actual image. Quicklooks allow quick assessment, previewing and browsing before loading the actual image.
taskA block in the context of a job, e.g., the Pleiades data block is a task in a job for a workflow that uses this data block.
testqueryA job consisting only in querying for data given a set of filters from an upstream data provider. Not all data providers might implement this functionality. The output is a GeoJSON enumerating the available data items. If no data exists for a particular query an empty GeoJSON is returned.
visual productAn image or data that is used for display purposes. It can also be used for feature extraction and/or classification based solely on the digital number (DN) — usual bit depth is 8 bit per pixel, per band (RGB). For example, detecting ships in a port can be done using pattern recognition techniques that rely on artificial neural networks.
workflowA directed acyclic graph of blocks.
Web MercatorThis is the standard web mapping CRS or SRS. Find out more in the SRS definition for EPSG:3857.