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Table 1 Input layers

From: Habitat preferences of diurnal raptors in relation to human access to their breeding territories in the Balkan Mountain Range, Bulgaria

Name of layer Modifications Original source
Centers of breeding territories Point layer created by GPS coordinates Authors’ field data
Settlements Point layer created by GPS coordinates JICA_Core_DB.mdb
Roads Line layer created after detailing by use of topographic map JICA_DB_TopoMap_2500 JICA_Core_DB.mdb/ T_BgRoad
Starting point on the Roads Point layer created by points obtained after calculating of the shortest distance between Centers of breeding territories and Roads Roads (modified) and Centers of breeding territories
Lodges Point layer created by GPS coordinates from several specialized portals www.bulgarian-mountains.com; www.btsbg.org/; http://www.tourism-bg.net/; https://www.planinite.info/; https://opoznai.bg/; http://www.hiji.tourism-bg.net/
Routes Tourist routes and trails www.bgmountains.org and JICA_Core_DB.mdb/ T_BgRoad
Starting point on the Routes Point layer created by points obtained after calculating of the shortest distance between Centers of breeding territories and Routes Routes and Centers of breeding territories
Religious tourism centers (monasteries and chapels) Point layer created by points taken from a topographic map JICA_DB_TopoMap_25000
Quarries/mines Point layer created by GPS coordinates www.mi.government.bg/bg
Starting points for rock climbing Point layer created by GPS coordinates www.climbingguidebg.com
Starting points for hang gliding and paragliding Point layer created by GPS coordinates www.skynomad.com
Caves Point layer created by points taken from a topographic map JICA_DB_TopoMap_25000
Waterfalls Point layer created by GPS coordinates Nikolov (2013)
Lift stations Point layer created by points taken from a topographic map JICA_DB_TopoMap_25000
Special Protection Areas (SPA) N2000_BG_120_ptici_2019.shp
http://natura2000.moew.government.bg/Home/Documents
Sites of Community Importance (SCI) N2000_BG_234_mestoobitania_2019.shp
http://natura2000.moew.government.bg/Home/Documents
Protected Areas under the Protected Areas Act zpo_all.shp
http://eea.government.bg/zpo/bg/index_download.jsp
Digital Elevation Model (DEM) Raster with 30 m pixel size, transformed to UTM35N and resampled to 20 m pixel size Shuttle Radar Topography Mission (SRTM)
https://earthdata.nasa.gov/nasa-shuttle-radar-topography-mission-srtm-version-3-0-global-1-arc-second-data-released-over-asia-and-australia