pg-evi-example.json

{
  "dc": {
    "process_id": "load_collection",
    "description": "Loading the data",
    "arguments": {
      "id": "Sentinel-2",
      "spatial_extent": {
        "west": 16.1,
        "east": 16.6,
        "north": 48.6,
        "south": 47.2
      },
      "temporal_extent": [
        "2018-01-01",
        "2018-02-01"
      ],
      "bands": [
        "B02",
        "B04",
        "B08"
      ]
    }
  },
  "evi": {
    "process_id": "reduce_dimension",
    "description": "Compute the EVI. Formula: 2.5 * (NIR - RED) / (1 + NIR + 6*RED + -7.5*BLUE)",
    "arguments": {
      "data": {
        "from_node": "dc"
      },
      "dimension": "bands",
      "reducer": {
        "process_graph": {
          "nir": {
            "process_id": "array_element",
            "arguments": {
              "data": {
                "from_parameter": "data"
              },
              "label": "B08"
            }
          },
          "red": {
            "process_id": "array_element",
            "arguments": {
              "data": {
                "from_parameter": "data"
              },
              "label": "B04"
            }
          },
          "blue": {
            "process_id": "array_element",
            "arguments": {
              "data": {
                "from_parameter": "data"
              },
              "label": "B02"
            }
          },
          "sub": {
            "process_id": "subtract",
            "arguments": {
              "x": {
                "from_node": "nir"
              },
              "y": {
                "from_node": "red"
              }
            }
          },
          "m1": {
            "process_id": "multiply",
            "arguments": {
              "x": 6,
              "y": {
                "from_node": "red"
              }
            }
          },
          "m2": {
            "process_id": "multiply",
            "arguments": {
              "x": -7.5,
              "y": {
                "from_node": "blue"
              }
            }
          },
          "sum": {
            "process_id": "sum",
            "arguments": {
              "data": [
                1,
                {
                  "from_node": "nir"
                },
                {
                  "from_node": "m1"
                },
                {
                  "from_node": "m2"
                }
              ]
            }
          },
          "div": {
            "process_id": "divide",
            "arguments": {
              "x": {
                "from_node": "sub"
              },
              "y": {
                "from_node": "sum"
              }
            }
          },
          "m3": {
            "process_id": "multiply",
            "arguments": {
              "x": 2.5,
              "y": {
                "from_node": "div"
              }
            },
            "result": true
          }
        }
      }
    }
  },
  "mintime": {
    "process_id": "reduce_dimension",
    "description": "Compute a minimum time composite by reducing the temporal dimension",
    "arguments": {
      "data": {
        "from_node": "evi"
      },
      "dimension": "t",
      "reducer": {
        "process_graph": {
          "min": {
            "process_id": "min",
            "arguments": {
              "data": {
                "from_parameter": "data"
              }
            },
            "result": true
          }
        }
      }
    }
  },
  "save": {
    "process_id": "save_result",
    "arguments": {
      "data": {
        "from_node": "mintime"
      },
      "format": "GTiff"
    },
    "result": true
  }
}