HTest: no visible global function definition for 'is.owin'
HTest: no visible global function definition for 'inside.owin'
HTest: no visible global function definition for 'area.owin'
HTest: no visible global function definition for 'union.owin'
HTest: no visible global function definition for 'intersect.owin'
HTest: no visible global function definition for 'erosion.owin'
HTest: no visible global function definition for 'dilation.owin'
area_esh: no visible global function definition for 'area.owin'
detectability_cps: no visible global function definition for 'disc'
detectability_cps: no visible global function definition for
  'intersect.owin'
detectability_cps: no visible global function definition for 'edges'
detectability_cps: no visible global function definition for
  'lengths.psp'
detectability_cps: no visible global function definition for
  'union.owin'
detectability_cps: no visible global function definition for 'erosion'
detectability_cps: no visible global function definition for 'dilation'
gg_wind: no visible global function definition for 'disc'
gg_wind: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'owin'
shades: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'disc'
visibility_thinning_cps: no visible global function definition for
  'disc'
visibility_thinning_cps: no visible global function definition for
  'intersect.owin'
visibility_thinning_cps: no visible global function definition for
  'inside.owin'
visibility_thinning_cps: no visible global function definition for
  'union.owin'
visibility_thinning_cps: no visible global function definition for
  'erosion'
visibility_thinning_cps: no visible global function definition for
  'dilation'
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for 'is.owin'
HTest: no visible global function definition for 'inside.owin'
HTest: no visible global function definition for 'area.owin'
HTest: no visible global function definition for 'union.owin'
HTest: no visible global function definition for 'intersect.owin'
HTest: no visible global function definition for 'erosion.owin'
HTest: no visible global function definition for 'dilation.owin'
area_esh: no visible global function definition for 'area.owin'
detectability_cps: no visible global function definition for 'disc'
detectability_cps: no visible global function definition for
  'intersect.owin'
detectability_cps: no visible global function definition for 'edges'
detectability_cps: no visible global function definition for
  'lengths.psp'
detectability_cps: no visible global function definition for
  'union.owin'
detectability_cps: no visible global function definition for 'erosion'
detectability_cps: no visible global function definition for 'dilation'
gg_wind: no visible global function definition for 'disc'
gg_wind: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'owin'
shades: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'disc'
visibility_thinning_cps: no visible global function definition for
  'disc'
visibility_thinning_cps: no visible global function definition for
  'intersect.owin'
visibility_thinning_cps: no visible global function definition for
  'inside.owin'
visibility_thinning_cps: no visible global function definition for
  'union.owin'
visibility_thinning_cps: no visible global function definition for
  'erosion'
visibility_thinning_cps: no visible global function definition for
  'dilation'
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for 'is.owin'
HTest: no visible global function definition for 'inside.owin'
HTest: no visible global function definition for 'area.owin'
HTest: no visible global function definition for 'union.owin'
HTest: no visible global function definition for 'intersect.owin'
HTest: no visible global function definition for 'erosion.owin'
HTest: no visible global function definition for 'dilation.owin'
area_esh: no visible global function definition for 'area.owin'
detectability_cps: no visible global function definition for 'disc'
detectability_cps: no visible global function definition for
  'intersect.owin'
detectability_cps: no visible global function definition for 'edges'
detectability_cps: no visible global function definition for
  'lengths.psp'
detectability_cps: no visible global function definition for
  'union.owin'
detectability_cps: no visible global function definition for 'erosion'
detectability_cps: no visible global function definition for 'dilation'
gg_wind: no visible global function definition for 'disc'
gg_wind: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'owin'
shades: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'disc'
visibility_thinning_cps: no visible global function definition for
  'disc'
visibility_thinning_cps: no visible global function definition for
  'intersect.owin'
visibility_thinning_cps: no visible global function definition for
  'inside.owin'
visibility_thinning_cps: no visible global function definition for
  'union.owin'
visibility_thinning_cps: no visible global function definition for
  'erosion'
visibility_thinning_cps: no visible global function definition for
  'dilation'
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for ‘is.owin’
HTest: no visible global function definition for ‘inside.owin’
HTest: no visible global function definition for ‘area.owin’
HTest: no visible global function definition for ‘union.owin’
HTest: no visible global function definition for ‘intersect.owin’
HTest: no visible global function definition for ‘erosion.owin’
HTest: no visible global function definition for ‘dilation.owin’
area_esh: no visible global function definition for ‘area.owin’
detectability_cps: no visible global function definition for ‘disc’
detectability_cps: no visible global function definition for
  ‘intersect.owin’
detectability_cps: no visible global function definition for ‘edges’
detectability_cps: no visible global function definition for
  ‘lengths.psp’
detectability_cps: no visible global function definition for
  ‘union.owin’
detectability_cps: no visible global function definition for ‘erosion’
detectability_cps: no visible global function definition for ‘dilation’
gg_wind: no visible global function definition for ‘disc’
gg_wind: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘owin’
shades: no visible global function definition for ‘union.owin’
shades: no visible global function definition for ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘disc’
visibility_thinning_cps: no visible global function definition for
  ‘intersect.owin’
visibility_thinning_cps: no visible global function definition for
  ‘inside.owin’
visibility_thinning_cps: no visible global function definition for
  ‘union.owin’
visibility_thinning_cps: no visible global function definition for
  ‘erosion’
visibility_thinning_cps: no visible global function definition for
  ‘dilation’
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for 'is.owin'
HTest: no visible global function definition for 'inside.owin'
HTest: no visible global function definition for 'area.owin'
HTest: no visible global function definition for 'union.owin'
HTest: no visible global function definition for 'intersect.owin'
HTest: no visible global function definition for 'erosion.owin'
HTest: no visible global function definition for 'dilation.owin'
area_esh: no visible global function definition for 'area.owin'
detectability_cps: no visible global function definition for 'disc'
detectability_cps: no visible global function definition for
  'intersect.owin'
detectability_cps: no visible global function definition for 'edges'
detectability_cps: no visible global function definition for
  'lengths.psp'
detectability_cps: no visible global function definition for
  'union.owin'
detectability_cps: no visible global function definition for 'erosion'
detectability_cps: no visible global function definition for 'dilation'
gg_wind: no visible global function definition for 'disc'
gg_wind: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'owin'
shades: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'disc'
visibility_thinning_cps: no visible global function definition for
  'disc'
visibility_thinning_cps: no visible global function definition for
  'intersect.owin'
visibility_thinning_cps: no visible global function definition for
  'inside.owin'
visibility_thinning_cps: no visible global function definition for
  'union.owin'
visibility_thinning_cps: no visible global function definition for
  'erosion'
visibility_thinning_cps: no visible global function definition for
  'dilation'
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin
HTest: no visible global function definition for 'is.owin'
HTest: no visible global function definition for 'inside.owin'
HTest: no visible global function definition for 'area.owin'
HTest: no visible global function definition for 'union.owin'
HTest: no visible global function definition for 'intersect.owin'
HTest: no visible global function definition for 'erosion.owin'
HTest: no visible global function definition for 'dilation.owin'
area_esh: no visible global function definition for 'area.owin'
detectability_cps: no visible global function definition for 'disc'
detectability_cps: no visible global function definition for
  'intersect.owin'
detectability_cps: no visible global function definition for 'edges'
detectability_cps: no visible global function definition for
  'lengths.psp'
detectability_cps: no visible global function definition for
  'union.owin'
detectability_cps: no visible global function definition for 'erosion'
detectability_cps: no visible global function definition for 'dilation'
gg_wind: no visible global function definition for 'disc'
gg_wind: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'owin'
shades: no visible global function definition for 'union.owin'
shades: no visible global function definition for 'disc'
visibility_thinning_cps: no visible global function definition for
  'disc'
visibility_thinning_cps: no visible global function definition for
  'intersect.owin'
visibility_thinning_cps: no visible global function definition for
  'inside.owin'
visibility_thinning_cps: no visible global function definition for
  'union.owin'
visibility_thinning_cps: no visible global function definition for
  'erosion'
visibility_thinning_cps: no visible global function definition for
  'dilation'
Undefined global functions or variables:
  area.owin dilation dilation.owin disc edges erosion erosion.owin
  inside.owin intersect.owin is.owin lengths.psp owin union.owin