Date (Creation)

2020-12-01

Identifier

IDEC / ortoimatge-satellit-sentinel-2-estacional-v1r0-estiu-2019

Date (Publication)

2016-12-15

Custodian

  Spatial Data Infrastructure of Catalonia
https://www.ide.cat

Purpose

The objectives of this geoinformation are: to facilitate a territorial representation of spatial data; and to facilitate the knowledge and interpretation of the territory.

Maintenance and update frequency

As needed

GEMET - INSPIRE themes, version 1.0

• Orthoimagery

Place

• Catalonia
• Spain
• Europe

Theme

• Copernicus
• Sentinel-2
• Orthoimagery
• Imagery
• RGB

Access constraints

Other restrictions

Other constraints

No limitations

Use constraints

Other restrictions

Other constraints

https://www.icgc.cat/conditions

Other constraints

The images can be used freely including the following text: "Contains Sentinel Copernicus data modified by the Cartographic and Geological Institute of Catalonia"

Spatial representation type

Grid

Distance

10  m

Metadata language

Catalan; Valencian

Topic category

• Imagery base maps earth cover

Description

The dataset referred to in this metadata corresponds to the entire territory of Catalonia. Its horizontal extension is described in this metadata in geographical coordinates with the minimum and maximum longitude and latitude of the minimum rectangle containing the cartography scope. It is, therefore, an approximate geographical area. The time extension refers to the dates of capturing the images (start and end dates). The capture dates of all the images that contributes to the mosaic of Catalonia are detailed in the quality section of this metadata file.

Begin date

2019-06-27

End date

2019-10-08

Reference system identifier

http://www.opengis.net/def/crs/EPSG/0/25831

Distribution format

• GeoTIFF ( - )

  Specification

  https://www.iana.org/assignments/media-types/image/tiff

OnLine resource

Technical specifications

Units of distribution

L'Ortoimatge Sentinel-2 de Catalunya es distribueix en quatre fulls, que no solapen entre ells (sense intersecció). Els quatre fulls són: Nord-Oest (01), Nord-Est (02), Sud-Oest (03), Sud-Est (04). A les especificacions tècniques es descriu com identificar el full al qual pertany un fitxer de dades a partir de la seva nomenclatura.

OnLine resource

Data download

Download data in GeoTIFF format of 8-bit natural color (RGB)

OnLine resource

WMS Service

Online map service that visualizes the dataset.

Hierarchy level

Dataset

Statement

The original images used to make the seasonal Sentinel-2 satellite orthoimage are recorded by the Sentinel-2A and Sentinel-2B satellites in various orbits, rectified radiometrically and geometrically and with atmospheric correction applied using software from the ESA, and organized in granules or tiles of 100x100 km with UTM projection and time zone orientation. The images needed to cover the territory of Catalonia in a specific seasonal period of the year (summer, winter ...) are downloaded from the ESA Copernicus Open Access Hub, selecting those with fewer clouds and no discontinuities between tiles (caused by atmospheric correction) to avoid the maximum number of artifacts (clouds, etc.), and a composition of them is made using a mosaic according to cut lines that may be irregular and that define the contributions of each image in the resulting orthoimage.

Description

To make the 2019 summer mosaic, the balance between having the Pyrenees free of snow and, at the same time with little elongated shadows, substantially reduces the choice of images. We have the period with less snow well into the summer, at the end of August and September. However, at the end of September the shadows are already becoming too large and very marked. This mosaic has been obtained by combining scenes within the period from late June to early October. Specifically, for the eastern part (orbit R008) the images 2019-08-16 (northeastern part) and the image from 2019-06-27 (southeastern part) have been used. For the western part (orbit R051) the image 2019-09-03 has been used basically and to a certain extent (in the most southwestern part) the image of 2019-07-05. A patch has also been made in the north-central zone, near the overlap zone between the two orbits, using the image 2019-10-08. Data of 2019 and 2020 from Sentinel Copernicus, owned by the European Space Agency (ESA).

File identifier

ortoimatge-satellit-sentinel-2-estacional-v1r0-estiu-2019 XML

Metadata language

Catalan; Valencian

Character set

UTF8

Hierarchy level

Dataset

Date stamp

2021-03-24T14:27:28

Metadata standard name

ISO 19115 2003/Cor.1:2006 Geographic Information - Metadata; INSPIRE Commission Regulation (EC) No 1205/2008 (TG 2.0)