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Author: Martin Jung
Contact: jung@iiasa.ac.at
License: CC-0

Description:
These Reference grids have been created for the NaturaConnect project and are based on an intersection of the European Coastline delineation ( https://www.eea.europa.eu/data-and-maps/data/eea-coastline-for-analysis-1/gis-data/europe-coastline-shapefile ) and the GADM database.
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Update on all Grids for consistency with EEA reference grids  
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Furthermore the reference grids have been created in a way so that they are fully consistent with the EEA reference grid (https://www.eea.europa.eu/data-and-maps/data/eea-reference-grids-2).
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Filestructure:
ReferenceGrid_Europe_{format}_{grain}
- format is either frac for fractional data (which has been multiplied with 10000 to save in integer format) or binary (0,1).
- grain is provided as layers in 100m, 1000m, 5000m, 10000m, 50000m spatial resolution. Alternative aggregations can be provided on request.

Geographic projection:
We use the Lamberts-Equal-Area Projection by default for all layers in NaturaConnect. This is an equal-area (but distorted shape) projection and commonly used by European institution with a focus on the European continent.
https://epsg.io/3035

Sourcecode:
The script to reproduce the layers have been made available here
https://gitlab.iiasa.ac.at/bec/naturaconnect/GridsAndBoundaries