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process_terrain_data_32bit.f90
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process_terrain_data_32bit.f90
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!process_terrain_data.f90
subroutine process_terrain_data_32bit
use NORTRIP_multiroad_index_definitions
implicit none
integer ncols
integer nrows
real cellsize
character(256), allocatable :: filename_ascii(:)
character(256) temp_name
integer :: unit_out=30
character(256) temp_str
integer temp_int
real temp_real
integer i,ii,j,jj
integer n_grid_search_canyon,n_grid_search_skyview
integer grid_search_index
real x_point,y_point
real lat_point,lon_point
integer i_point,j_point
integer i_min_search,i_max_search,j_min_search,j_max_search
real search_min,search_max
real road_angle,stepsize
real x_point_step,y_point_step
integer i_point_step,j_point_step
real dist_step,height_angle_max,height_angle
real height_angle_max_final(2)
real height_angle_max_av(2)
real width_canyon(2),height_canyon(2)
real :: pi=3.14159
integer s,f,ro
integer exists
integer count_found
real y_point_north,x_point_north,y_point_south,x_point_south
integer i_point_north,j_point_north,i_point_south,j_point_south
real :: max_slope=15.
character(256) message
integer south_index,north_index
parameter (south_index=1,north_index=2)
!set search parameters for shading
real :: length_segment_init=50.
real :: kerb_width=5.
real :: max_canyon_search_distance=200.
real :: max_skyview_search_distance=5000.
real :: forest_kerb_width=10.
real :: forest_height=10.
integer :: is_forest=0
integer seg,n_segments,n_valid_segment
real length_segment
real height_angle_max_av_canyon(2),height_angle_max_canyon(2)
real height_angle_max_skyview(n_skyview)
real height_angle_max_av_skyview(n_skyview)
logical :: first_valid_segment=.false.
!n_skyview set in definitions
allocate (az_skyview(n_skyview,n_roadlinks))
allocate (zen_skyview(n_skyview,n_roadlinks))
allocate (dis_skyview(n_skyview,n_roadlinks))
allocate (height_skyview(n_skyview,n_roadlinks))
write(unit_logfile,'(A)') '================================================================'
write(unit_logfile,'(A)') 'Calculating shading parameters (process_terrain_data_32bit)'
write(unit_logfile,'(A)') '================================================================'
az_skyview=0.
zen_skyview=90.
dis_skyview=0.
height_skyview=0.
if (n_dem_files.lt.1) then
write(unit_logfile,'(A)') ' WARNING: No terrain files available. Will not calculate skyview or street canyon parameters'
return
endif
allocate (filename_ascii(n_dem_files))
do f=1,n_dem_files
filename_ascii(f)=trim(pathname_terrain)//trim(filename_terrain_data(f))
!write(*,*) trim(filename_ascii(f))
enddo
count_found=0
do f=1,n_dem_files
!Test existence of the roadlink filename (1). If does not exist then use default
!write(*,*) trim(filename_ascii(f)),' ',trim(filename_terrain_data(f))
inquire(file=trim(filename_ascii(f)),exist=exists)
if (.not.exists) then
write(unit_logfile,'(A,A)') ' WARNING: Terrain file does not exist: ', trim(filename_ascii(f))
goto 10
endif
if (index(filename_ascii(f),'.asc').gt.0) then
write(unit_logfile,'(A)') ' Reading terrain asc file'
call read_esri_ascii_terrain_file(filename_ascii(f),ncols,nrows,cellsize)
elseif (index(filename_ascii(f),'.nc').gt.0) then
write(unit_logfile,'(A)') ' Reading terrain netcdf file '
call read_netcdf3_terrain_file(filename_ascii(f),ncols,nrows,cellsize)
else
write(unit_logfile,'(A,A)') ' WARNING: Terrain file type not netcdf or asc. Cannot read ', trim(filename_ascii(f))
goto 10
endif
!Define a point for testing
!x_point=xllcorner+140.0*cellsize
!y_point=yllcorner+122.4*cellsize
!Loop through road links
do ro=1,n_roadlinks
n_segments=int(inputdata_rl(length_rl_index,ro)/length_segment_init)+1
!n_segments=max(1,n_segments)
length_segment=inputdata_rl(length_rl_index,ro)/n_segments
!write(*,*) ro,n_segments,length_segment
first_valid_segment=.true.
do seg=0,n_segments-1
x_point=(inputdata_rl(x1_rl_index,ro)*(n_segments-seg-.5)+inputdata_rl(x2_rl_index,ro)*(seg+.5))/n_segments
y_point=(inputdata_rl(y1_rl_index,ro)*(n_segments-seg-.5)+inputdata_rl(y2_rl_index,ro)*(seg+.5))/n_segments
!Here we assume that the road link data is in UTM coordinates and the terrain data is in UTM33
!If utm_zone <> terrain_utm_zone for the road links then convert the road data points to utm 33
if (utm_zone.ne.terrain_utm_zone) then
call UTM2LL(utm_zone,y_point,x_point,lat_point,lon_point)
call LL2UTM(1,terrain_utm_zone,lat_point,lon_point,y_point,x_point)
endif
!Determine the grid index it is in
i_point=int((x_point-x_array(1)+cellsize)/(x_array(ncols)-x_array(1)+cellsize)*ncols+1)
j_point=int((y_point-y_array(1)+cellsize)/(y_array(nrows)-y_array(1)+cellsize)*nrows+1)
!write(*,*) 'Grid index :',i_point,j_point
!Mark it as out of bounds
if (i_point.lt.0.or.i_point.gt.ncols) i_point=0
if (j_point.lt.0.or.j_point.gt.nrows) j_point=0
!Search for minimum in the local area
if (i_point.ne.0.and.j_point.ne.0) then
!Do not find minimum if grid size is > 15 m. So only for 10 m or 5 m terrain data
if (cellsize.gt.15) then
search_min=array(i_point,j_point)
search_max=array(i_point,j_point)
else
do grid_search_index=1,1
i_min_search=max(i_point-grid_search_index,1)
i_max_search=min(i_point+grid_search_index,ncols)
j_min_search=max(j_point-grid_search_index,1)
j_max_search=min(j_point+grid_search_index,nrows)
search_min=minval(array(i_min_search:i_max_search,j_min_search:j_max_search))
search_max=maxval(array(i_min_search:i_max_search,j_min_search:j_max_search))
!write(*,*) 'Distance (+/-): ',grid_search_index*cellsize,'Min: ',search_min,' Max: ',search_max
enddo
endif
endif
!Search in a particular direction
road_angle=inputdata_rl(angle_rl_index,ro)
stepsize=cellsize
n_grid_search_canyon=int(max_canyon_search_distance/stepsize) !Number of grids to search in, out to a radius of max_canyon_search_distance
width_canyon=stepsize
height_canyon=0
height_angle_max=0
!search_min=array(i_point,j_point)
!If the point is inside the terrain area
if (i_point.ne.0.and.j_point.ne.0) then
count_found=count_found+1
inputdata_rl(elevation_rl_index,ro)=array(i_point,j_point)
if (first_valid_segment) then
n_valid_segment=1
else
n_valid_segment=n_valid_segment+1
endif
!Calculate canyon width and height
do j=south_index,north_index
height_angle_max=0
do i=1,n_grid_search_canyon
!Select north (2) or south (1) directions
if (j.eq.south_index) dist_step=i*stepsize
if (j.eq.north_index) dist_step=-i*stepsize
!Set position of the step
x_point_step=x_point+cos(pi/180.*road_angle)*dist_step
y_point_step=y_point-sin(pi/180.*road_angle)*dist_step
!Determine the grid index it is in
i_point_step=int((x_point_step-x_array(1)+cellsize)/(x_array(ncols)-x_array(1)+cellsize)*ncols+1)
j_point_step=int((y_point_step-y_array(1)+cellsize)/(y_array(nrows)-y_array(1)+cellsize)*nrows+1)
if (i_point_step.gt.1.and.i_point_step.lt.ncols.and.j_point_step.gt.1.and.j_point_step.lt.nrows) then
!Calculate the height angle
height_angle=atan((array(i_point_step,j_point_step)-search_min)/abs(dist_step))
if (height_angle.gt.height_angle_max) then
width_canyon(j)=dist_step
height_canyon(j)=max(array(i_point_step,j_point_step)-search_min,0.)
height_angle_max=height_angle
endif
!write(*,'(i6,5f12.2)') j,dist_step,x_point_step-x_point,y_point_step-y_point,height_angle,height_canyon(j)
endif
enddo
height_angle_max_canyon(j)=height_angle_max
enddo !Direction loop
if (first_valid_segment) then
height_angle_max_av_canyon=height_angle_max_canyon
else
height_angle_max_av_canyon=height_angle_max_av_canyon*(n_valid_segment-1.)/n_valid_segment+height_angle_max_canyon/n_valid_segment
endif
!write(*,*) ro,height_angle_max_av_canyon
!write(*,'(A,i6,a,2f6.2,a,2f6.2)') 'Road:',ro,' Width canyon (N/S): ',width_canyon(2),width_canyon(1),' Height canyon (N/S): ',height_canyon(1),height_canyon(2)
!inputdata_rl(canyonheight_north_rl_index,ro)=height_canyon(2)
!inputdata_rl(canyonheight_south_rl_index,ro)=height_canyon(1)
!inputdata_rl(canyonwidth_rl_index,ro)=abs(width_canyon(1))+abs(width_canyon(2))
!inputdata_rl(canyondist_north_rl_index,ro)=abs(width_canyon(2))
!inputdata_rl(canyondist_south_rl_index,ro)=abs(width_canyon(1))
!Calculate skyview
stepsize=cellsize
!n_grid_search_skyview=40
n_grid_search_skyview=int(sqrt(max_skyview_search_distance/stepsize-n_grid_search_canyon))+n_grid_search_canyon
do s=1,n_skyview
az_skyview(s,ro)=(s-1)*360./n_skyview
height_angle_max=0
do i=1,n_grid_search_skyview
!Set step sizes below 10 (i.e. 50 m) it is the same step as for the canyon.
!Above this it increases with the square to get the distant topography.
!Value of n_grid_search_skyview=40 and stepsize=5 is 4.5 km
if (i.le.n_grid_search_canyon) then
dist_step=i*stepsize
else
dist_step=stepsize*(n_grid_search_canyon+(i-n_grid_search_canyon)**2)
endif
!Set position of the step
x_point_step=x_point+sin(pi/180.*az_skyview(s,ro))*dist_step
y_point_step=y_point+cos(pi/180.*az_skyview(s,ro))*dist_step
!Determine the grid index it is in
i_point_step=int((x_point_step-x_array(1)+cellsize)/(x_array(ncols)-x_array(1)+cellsize)*ncols+1)
j_point_step=int((y_point_step-y_array(1)+cellsize)/(y_array(nrows)-y_array(1)+cellsize)*nrows+1)
if (i_point_step.gt.1.and.i_point_step.lt.ncols.and.j_point_step.gt.1.and.j_point_step.lt.nrows) then
!Calculate the height angle
height_angle=atan((array(i_point_step,j_point_step)-search_min)/abs(dist_step))
if (height_angle.gt.height_angle_max) then
dis_skyview(s,ro)=dist_step
height_skyview(s,ro)=max(array(i_point_step,j_point_step)-search_min,0.)
height_angle_max=height_angle
endif
!write(*,'(i6,5f12.2)') s,dist_step,x_point_step-x_point,y_point_step-y_point,height_angle,height_skyview(s,ro)
endif
enddo
height_angle_max_skyview(s)=height_angle_max
!zen_skyview(s,ro)=max(min(90.-180./pi*height_angle_max,90.),0.)
enddo !skyview
if (first_valid_segment) then
height_angle_max_av_skyview=height_angle_max_skyview
else
height_angle_max_av_skyview=height_angle_max_av_skyview*(n_valid_segment-1.)/n_valid_segment+height_angle_max_skyview/n_valid_segment
endif
!write(*,'(a,i6,<n_skyview>f6.0)') 'AZIMUTH: ',ro,(az_skyview(s,ro),s=1,n_skyview)
!write(*,'(a,i6,<n_skyview>f6.1)') 'ZENITH: ',ro,(zen_skyview(s,ro),s=1,n_skyview)
!write(*,'(a,i6,<n_skyview>f6.0)') 'DISTANCE: ',ro,(dis_skyview(s,ro),s=1,n_skyview)
!write(*,'(a,i6,<n_skyview>f6.0)') 'HEIGHT: ',ro,(height_skyview(s,ro),s=1,n_skyview)
!Set first valid segment to false since it has now been found in the domain
if (first_valid_segment) then
first_valid_segment=.false.
endif
else
height_angle_max_av_skyview=missing_data
height_angle_max_av_canyon=missing_data
endif !if within domain
enddo !segments
!Set the avaerage skyview
if (height_angle_max_av_skyview(1).ne.missing_data) then
do s=1,n_skyview
zen_skyview(s,ro)=max(min(90.-180./pi*height_angle_max_skyview(s),90.),0.)
enddo
endif
if (height_angle_max_av_canyon(north_index).ne.missing_data) then
!Put the canyon width always at road_width+10 m.
inputdata_rl(canyonwidth_rl_index,ro)=inputdata_rl(width_rl_index,ro)+kerb_width*2.
!Set the heights according to the average height angle
inputdata_rl(canyondist_north_rl_index,ro)=inputdata_rl(canyonwidth_rl_index,ro)/2.
inputdata_rl(canyondist_south_rl_index,ro)=inputdata_rl(canyonwidth_rl_index,ro)/2.
inputdata_rl(canyonheight_north_rl_index,ro)=tan(height_angle_max_av_canyon(north_index))*inputdata_rl(canyondist_north_rl_index,ro)
inputdata_rl(canyonheight_south_rl_index,ro)=tan(height_angle_max_av_canyon(south_index))*inputdata_rl(canyondist_south_rl_index,ro)
!write(*,'(A,i6,A,i10,A,i4,a,2f6.1,a,2f6.1,a,2f6.1,a,f6.2)') 'Road:',ro,' ID:',inputdata_int_rl(id_rl_index,ro), &
! ' n_seg:',n_segments,' Width canyon (N/S): ', &
! inputdata_rl(canyondist_north_rl_index,ro),inputdata_rl(canyondist_south_rl_index,ro) &
! ,' Height canyon (N/S): ',inputdata_rl(canyonheight_north_rl_index,ro),inputdata_rl(canyonheight_south_rl_index,ro) &
! ,' Angle canyon (N/S): ',height_angle_max_av_canyon(north_index)*180/pi,height_angle_max_av_canyon(south_index)*180/pi &
! ,' Road angle: ',inputdata_rl(angle_rl_index,ro)
!write(*,*) ro,inputdata_rl(canyonheight_north_rl_index,ro),height_angle_max_av_canyon
!Calculate road slope
if (inputdata_rl(y1_rl_index,ro).ge.inputdata_rl(y2_rl_index,ro)) then
y_point_north=inputdata_rl(y1_rl_index,ro)
x_point_north=inputdata_rl(x1_rl_index,ro)
y_point_south=inputdata_rl(y2_rl_index,ro)
x_point_south=inputdata_rl(x2_rl_index,ro)
else
y_point_north=inputdata_rl(y2_rl_index,ro)
x_point_north=inputdata_rl(x2_rl_index,ro)
y_point_south=inputdata_rl(y1_rl_index,ro)
x_point_south=inputdata_rl(x1_rl_index,ro)
endif
if (utm_zone.ne.terrain_utm_zone) then
call UTM2LL(utm_zone,y_point_north,x_point_north,lat_point,lon_point)
call LL2UTM(1,terrain_utm_zone,lat_point,lon_point,y_point_north,x_point_north)
call UTM2LL(utm_zone,y_point_south,x_point_south,lat_point,lon_point)
call LL2UTM(1,terrain_utm_zone,lat_point,lon_point,y_point_south,x_point_south)
endif
!Determine the grid index it is in
i_point_north=int((x_point_north-x_array(1)+cellsize)/(x_array(ncols)-x_array(1)+cellsize)*ncols+1)
j_point_north=int((y_point_north-y_array(1)+cellsize)/(y_array(nrows)-y_array(1)+cellsize)*nrows+1)
i_point_south=int((x_point_south-x_array(1)+cellsize)/(x_array(ncols)-x_array(1)+cellsize)*ncols+1)
j_point_south=int((y_point_south-y_array(1)+cellsize)/(y_array(nrows)-y_array(1)+cellsize)*nrows+1)
!write(*,*) j_point_north,i_point_north,j_point_south,i_point_south
if (i_point_north.gt.1.and.i_point_north.lt.ncols.and.j_point_north.gt.1.and.j_point_north.lt.nrows) then
if (i_point_south.gt.1.and.i_point_south.lt.ncols.and.j_point_south.gt.1.and.j_point_south.lt.nrows) then
inputdata_rl(slope_rl_index,ro)=180./pi*atan((array(i_point_north,j_point_north)-array(i_point_south,j_point_south))/inputdata_rl(length_rl_index,ro))
!write(*,*) inputdata_rl(slope_rl_index,ro)
endif
endif
!Maximum slope is 15 degrees
if (inputdata_rl(slope_rl_index,ro).gt.max_slope) inputdata_rl(slope_rl_index,ro)=max_slope
if (inputdata_rl(slope_rl_index,ro).lt.-max_slope) inputdata_rl(slope_rl_index,ro)=-max_slope
endif!if not missing data
enddo !Road loop
if (allocated(array)) deallocate(array)
if (allocated(x_array)) deallocate(x_array)
if (allocated(y_array)) deallocate(y_array)
10 enddo !File loop
write(unit_logfile,'(A,f12.1,i12)') ' Canyon search distance (m) and index: ',max_canyon_search_distance,n_grid_search_canyon
write(unit_logfile,'(A,f12.1,i12)') ' Skyview search distance (m) and index: ',max_skyview_search_distance,n_grid_search_skyview
write(unit_logfile,'(A,2f6.1,a,2f6.1,A,f8.1,A,f8.1,a,i6)') ' Max width canyon (N/S): ' &
,maxval(inputdata_rl(canyondist_north_rl_index,:)),maxval(inputdata_rl(canyondist_south_rl_index,:)), &
' Max height canyon (N/S): ',maxval(inputdata_rl(canyonheight_north_rl_index,:)),maxval(inputdata_rl(canyonheight_south_rl_index,:)) &
,' Min skyview zenith: ',minval(zen_skyview(:,:)),' Max skyview dist: ',maxval(dis_skyview(:,:)), &
' Links found: ',count_found
if (allocated(filename_ascii)) deallocate (filename_ascii)
!Instead of saving the north and south distance then an 'equivalent' canyon height could be made using the smallest or average distance.
!Something to think about. Wouldn't need to change the model then
!Read in forest data and reset canyon appropriately
!Sets canyon to 0
if (n_forest_files.gt.0) then
allocate (filename_ascii(n_forest_files))
do f=1,n_forest_files
filename_ascii(f)=trim(pathname_forest)//trim(filename_forest_data(f))
!write(*,*) trim(filename_ascii(f))
enddo
do ro=1,n_roadlinks
inputdata_rl(canyonwidth_rl_index,ro)=inputdata_rl(width_rl_index,ro)+kerb_width*2.
inputdata_rl(canyondist_north_rl_index,ro)=inputdata_rl(canyonwidth_rl_index,ro)/2.
inputdata_rl(canyondist_south_rl_index,ro)=inputdata_rl(canyonwidth_rl_index,ro)/2.
inputdata_rl(canyonheight_north_rl_index,ro)=1.
inputdata_rl(canyonheight_south_rl_index,ro)=1.
enddo
do f=1,n_forest_files
inquire(file=trim(filename_ascii(f)),exist=exists)
if (.not.exists) then
write(unit_logfile,'(A,A)') ' WARNING: forest file does not exist: ', trim(filename_ascii(f))
goto 20
endif
if (index(filename_ascii(f),'.asc').gt.0) then
write(unit_logfile,'(A)') ' Reading forest asc file'
call read_esri_ascii_terrain_file(filename_ascii(f),ncols,nrows,cellsize)
elseif (index(filename_ascii(f),'.nc').gt.0) then
write(unit_logfile,'(A)') ' Reading forest netcdf file '
call read_netcdf3_terrain_file(filename_ascii(f),ncols,nrows,cellsize)
else
write(unit_logfile,'(A,A)') ' WARNING: Forest file type not netcdf or asc. Cannot read ', trim(filename_ascii(f))
goto 20
endif
!Loop through road links
do ro=1,n_roadlinks
n_segments=int(inputdata_rl(length_rl_index,ro)/length_segment_init)+1
!n_segments=max(1,n_segments)
length_segment=inputdata_rl(length_rl_index,ro)/n_segments
!write(*,*) ro,n_segments,length_segment
first_valid_segment=.true.
is_forest=0
do seg=0,n_segments-1
x_point=(inputdata_rl(x1_rl_index,ro)*(n_segments-seg-.5)+inputdata_rl(x2_rl_index,ro)*(seg+.5))/n_segments
y_point=(inputdata_rl(y1_rl_index,ro)*(n_segments-seg-.5)+inputdata_rl(y2_rl_index,ro)*(seg+.5))/n_segments
!Here we assume that the road link data is in UTM coordinates and the terrain data is in UTM33
!If utm_zone <> terrain_utm_zone for the road links then convert the road data points to utm 33
if (utm_zone.ne.terrain_utm_zone) then
call UTM2LL(utm_zone,y_point,x_point,lat_point,lon_point)
call LL2UTM(1,terrain_utm_zone,lat_point,lon_point,y_point,x_point)
endif
!Determine the grid index it is in
i_point=int((x_point-x_array(1)+cellsize)/(x_array(ncols)-x_array(1)+cellsize)*ncols+1)
j_point=int((y_point-y_array(1)+cellsize)/(y_array(nrows)-y_array(1)+cellsize)*nrows+1)
!write(*,*) 'Grid index :',i_point,j_point
!Mark it as out of bounds
if (i_point.lt.0.or.i_point.gt.ncols) i_point=0
if (j_point.lt.0.or.j_point.gt.nrows) j_point=0
!See if there is forest for that segment
if (i_point.ne.0.and.j_point.ne.0) then
if (array(i_point,j_point).gt.0) then
is_forest=is_forest+1
!write(*,*) 'Forest found at: ',i_point,j_point
endif
endif
enddo
if (is_forest.gt.0) then
inputdata_rl(canyonwidth_rl_index,ro)=inputdata_rl(width_rl_index,ro)+forest_kerb_width*2.
inputdata_rl(canyondist_north_rl_index,ro)=inputdata_rl(canyonwidth_rl_index,ro)/2.
inputdata_rl(canyondist_south_rl_index,ro)=inputdata_rl(canyonwidth_rl_index,ro)/2.
inputdata_rl(canyonheight_north_rl_index,ro)=forest_height*real(is_forest)/real(n_segments) !If only a fraction of segments is forest then decrease height
inputdata_rl(canyonheight_south_rl_index,ro)=forest_height*real(is_forest)/real(n_segments)
!write(*,*) 'Forest found at: ',is_forest,i_point,j_point,inputdata_rl(canyonheight_north_rl_index,ro),inputdata_rl(canyonheight_south_rl_index,ro)
endif
enddo
20 enddo
endif
!Save the data to be read later
temp_name=trim(pathname_terrain)//trim(filename_skyview)
write(unit_logfile,'(a)') ' Saving skyview for NORTRIP to: '//trim(temp_name)
open(unit_out,file=temp_name,status='replace')
write(unit_out,'(A)') 'Street canyon and skyview zenith angles data for NORTRIP in '//trim(city_str(1))//' (not tab delimitted)'
write(unit_out,'(A,i6)') 'n_roads: ',n_roadlinks
write(unit_out,'(A,i6)') 'n_skyview_angles: ',n_skyview
write(unit_out,'(A8,7A14,<n_skyview>f8.1)') 'Road','RoadLinkID','Elevation','Slope','Can_dis_N','Can_dis_S','Can_height_N','Can_height_S',(az_skyview(s,1),s=1,n_skyview)
do ro=1,n_roadlinks
write(unit_out,'(i8,i14,6f14.1,<n_skyview>f8.1)') &
,ro &
,inputdata_int_rl(id_rl_index,ro) &
,inputdata_rl(elevation_rl_index,ro),inputdata_rl(slope_rl_index,ro) &
,inputdata_rl(canyondist_north_rl_index,ro),inputdata_rl(canyondist_south_rl_index,ro) &
,inputdata_rl(canyonheight_north_rl_index,ro),inputdata_rl(canyonheight_south_rl_index,ro) &
,(zen_skyview(s,ro),s=1,n_skyview)
enddo
close (unit_out,IOMSG=message)
!write(*,*) 'MESSAGE: ',trim(message)
if (allocated(az_skyview)) deallocate(az_skyview)
if (allocated(zen_skyview)) deallocate(zen_skyview)
if (allocated(dis_skyview)) deallocate(dis_skyview)
if (allocated(height_skyview)) deallocate(height_skyview)
if (allocated(filename_ascii)) deallocate(filename_ascii)
end subroutine process_terrain_data_32bit