kopia lustrzana https://github.com/OpenDroneMap/WebODM
55 wiersze
1.9 KiB
Python
55 wiersze
1.9 KiB
Python
import os
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import json
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from rest_framework import serializers
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from rest_framework import status
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from rest_framework.response import Response
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from app.api.tasks import TaskNestedView
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from worker.tasks import execute_grass_script
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from app.plugins.grass_engine import grass, GrassEngineException
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from geojson import Feature, Point, FeatureCollection
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class GeoJSONSerializer(serializers.Serializer):
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area = serializers.JSONField(help_text="Polygon contour defining the volume area to compute")
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class TaskVolume(TaskNestedView):
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def post(self, request, pk=None):
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task = self.get_and_check_task(request, pk)
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if task.dsm_extent is None:
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return Response({'error': 'No surface model available'})
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serializer = GeoJSONSerializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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area = serializer['area'].value
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points = FeatureCollection([Feature(geometry=Point(coords)) for coords in area['geometry']['coordinates'][0]])
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dsm = os.path.abspath(task.get_asset_download_path("dsm.tif"))
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try:
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context = grass.create_context()
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context.add_file('area_file.geojson', json.dumps(area))
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context.add_file('points_file.geojson', str(points))
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context.add_param('dsm_file', dsm)
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context.set_location(dsm)
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output = execute_grass_script.delay(os.path.join(
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os.path.dirname(os.path.abspath(__file__)),
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"calc_volume.grass"
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), context.serialize()).get()
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cols = output.split(':')
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if len(cols) == 7:
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return Response({'volume': str(abs(float(cols[6])))}, status=status.HTTP_200_OK)
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else:
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raise GrassEngineException("Invalid GRASS output: {}".format(output))
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except GrassEngineException as e:
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return Response({'error': str(e)}, status=status.HTTP_200_OK)
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