I have two polygons that, when viewed visually, occupy a fairly equal area. But when you calculate the area, the area of the three polygons of the blue choice is more than three times larger. Why is this? and how can I adjust this. I would like to compare the two areas. Thanks in advance!
I have deposited the two polygons in google drive
Code:
# Blue_whale
Shp_Blue_whale = st_read('Daten/Blue-whale/data_0.shp')
Blue_whale_spatial = as(Shp_Blue_whale, 'Spatial')
raster::area(Blue_whale_spatial_1)/1000000000000
intersect <- raster::intersect(polygon.Nordatlantik, Blue_whale_spatial)
raster::area(intersect)/1000000000000
# Minke_whale
Shp_Minke_whale = st_read('Daten/Minky_Whale/data_0.shp')
Minke_whale_spatial = as(Shp_Minke_whale, 'Spatial')
raster::area(Minke_whale_spatial)/1000000000000
intersect <- raster::intersect(polygon.Nordatlantik, Minke_whale_spatial)
raster::area(intersect)/1000000000000
Output:
# Blue_whale
[1] 135.3370 122.6077 207.9080
# Minke_whale
[1] 136.0607
