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An example GPS track of a stork niclas and an example
Digital Elevation Model dem are included in the package.
The DEM is a snippet from the SRTM 90m Digital Elevation Database
v4.1 from CGIAR-CSI and the stork
track is a subset of the data in the study LifeTrack White Stork
SWGermany 2014-2017 (Movebank Study ID 21231406) from the Movebank Data
Repository.
The area covered by the test data is the Swiss midland. The example track is a data.frame with coordinates in x, y and z. The x and y coordinates are in the CH1903+ / LV95 (EPSG:2056) reference system.
head(niclas)
#> x y z
#> 1 2556476 1188336 1283.736
#> 2 2558565 1189297 1359.580
#> 3 2560477 1189861 1369.713
#> 4 2562431 1190668 1391.752
#> 5 2563809 1190657 1806.566
#> 6 2567940 1192930 1764.062The DEM is a rasterLayer of the raster package, it’s Coordinate Reference System (CRS) is also CH1903+ / LV95. The stork flies from southwest to northeast, GPS fixes are collected every 15 minutes.
dem
#> class : RasterLayer
#> dimensions : 175, 501, 87675 (nrow, ncol, ncell)
#> resolution : 251.2, 370.8 (x, y)
#> extent : 2543252, 2669103, 1177108, 1241998 (xmin, xmax, ymin, ymax)
#> crs : +init=epsg:2056 +proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 +k_0=1 +x_0=2600000 +y_0=1200000 +ellps=bessel +towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs
#> source : memory
#> names : srtm_38_03
#> values : 374.3316, 2602.137 (min, max)These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.