def handle_output(self, output, result, task):
cleanup_grass_context(result['context'])
cols = output.split(':')
if len(cols) == 7:
# Correct scale measurement for web mercator
# https://gis.stackexchange.com/questions/93332/calculating-distance-scale-factor-by-latitude-for-mercator#93335
latitude = task.dsm_extent.centroid[1]
scale_factor = math.cos(math.radians(latitude)) ** 2
volume = abs(float(cols[6]) * scale_factor)
return str(volume)
else:
raise TaskResultOutputError(output)
def get(self, request, pk=None, celery_task_id=None):
res = celery.AsyncResult(celery_task_id)
if not res.ready():
return Response({'ready': False}, status=status.HTTP_200_OK)
else:
result = res.get()
if result.get('error', None) is not None:
cleanup_grass_context(result['context'])
return Response({'ready': True, 'error': result['error']})
contours_file = result.get('output')
if not contours_file or not os.path.exists(contours_file):
cleanup_grass_context(result['context'])
return Response({'ready': True, 'error': 'Contours file could not be generated. This might be a bug.'})
request.session['contours_' + celery_task_id] = contours_file
return Response({'ready': True})
def get(self, request, pk=None, celery_task_id=None):
res = celery.AsyncResult(celery_task_id)
if not res.ready():
return Response({'ready': False}, status=status.HTTP_200_OK)
else:
result = res.get()
if result.get('error', None) is not None:
cleanup_grass_context(result['context'])
return Response({'ready': True, 'error': result['error']})
output = result.get('output')
if not output or not os.path.exists(output):
cleanup_grass_context(result['context'])
return Response({'ready': True, 'error': output})
request.session['elevation_map_' + celery_task_id] = output
return Response({'ready': True})
def handle_output(self, output, result, task):
cleanup_grass_context(result['context'])
cols = output.split(':')
if len(cols) == 7:
# Legacy: we had rasters in EPSG:3857 for a while
# This could be removed at some point in the future
# Correct scale measurement for web mercator
# https://gis.stackexchange.com/questions/93332/calculating-distance-scale-factor-by-latitude-for-mercator#93335
scale_factor = 1.0
dsm = os.path.abspath(task.get_asset_download_path("dsm.tif"))
with rasterio.open(dsm) as dst:
if str(dst.crs) == 'EPSG:3857':
latitude = task.dsm_extent.centroid[1]
scale_factor = math.cos(math.radians(latitude))**2
volume = abs(float(cols[6]) * scale_factor)
return str(volume)
else:
raise TaskResultOutputError(output)
def on_error(self, result):
cleanup_grass_context(result['context'])