Replace 'libtiff' python dependency with 'pylibtiff' (#1846)

* Replace 'libtiff' python dependency with 'pylibtiff'

* Fix invalid projections in builtin areas.yaml

* Remove legacy 'iber' area

satpy/etc/areas.yaml

@@ -285,27 +285,13 @@ sve:
   description:
     Sweden and baltic sea
   projection:
-    init: epsg:3006
+    EPSG: 3006
   shape:
     height: 2000
     width: 2000
   area_extent:
     lower_left_xy: [-342379.698, 6032580.06]
     upper_right_xy: [1423701.52, 8029648.75]
-iber:
-  description:
-    North half of the Iberian Peninsula and the Gulf of Biscay
-    image 0 degrees
-  projection:
-    proj: utm
-  shape:
-    height: 1000
-    width: 2000
-  area_extent:
-    lower_left_xy: [-342379.698, 4432580.06]
-    upper_right_xy: [723701.52, 5029648.75]
-    units: m
-
 brazil2:
   description: brazil, platecarree
   projection:

setup.py

@@ -35,7 +35,7 @@
             'dask[array] >=0.17.1', 'pyproj>=2.2', 'zarr', 'donfig', 'appdirs',
             'pooch']
 
-test_requires = ['behave', 'h5py', 'netCDF4', 'pyhdf', 'imageio', 'libtiff',
+test_requires = ['behave', 'h5py', 'netCDF4', 'pyhdf', 'imageio', 'pylibtiff',
                  'rasterio', 'geoviews', 'trollimage', 'fsspec', 'bottleneck',
                  'rioxarray', 'pytest', 'pytest-lazy-fixture']
 
@@ -67,7 +67,7 @@
     'cf': ['h5netcdf >= 0.7.3'],
     'awips_tiled': ['netCDF4 >= 1.1.8'],
     'geotiff': ['rasterio', 'trollimage[geotiff]'],
-    'mitiff': ['libtiff'],
+    'mitiff': ['pylibtiff'],
     'ninjo': ['pyninjotiff', 'pint'],
     # Composites/Modifiers:
     'rayleigh': ['pyspectral >= 0.10.1'],