Table 1 Input layers
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 | |
Starting points for rock climbing | Point layer created by GPS coordinates | |
Starting points for hang gliding and paragliding | Point layer created by GPS coordinates | |
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 |
Sites of Community Importance (SCI) | – | N2000_BG_234_mestoobitania_2019.shp |
Protected Areas under the Protected Areas Act | – | zpo_all.shp |
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) |