Pan-European Vulnerability to Pollution: T-Layer - Topography/slope
The T layer represents topographical information, i.e. the slope angle calculated from GTOPO30 1 km resolution elevation data, classified using class breaks proposed by the HOVER project
Slope calculation from GTOPO30 was done with SAGA GIS 7.7.1 software using algorithm of Zewenbergen & Thorne (1986).The slope angle scores 1 - 10 are provided as 4 byte floating point numbers in .tif format