{
  "name": "raster_statistic",
  "type": "function",
  "groups": ["Rasters"],
  "description": "Returns statistics from a raster layer.",
  "arguments": [{
    "arg": "layer",
    "description": "a string, representing either a raster layer name or layer ID"
  }, {
    "arg": "band",
    "description": "integer representing the band number from the raster layer, starting at 1"
  }, {
    "arg": "property",
    "description": "a string corresponding to the property to return. Valid options are:<br /><ul><li>min: minimum value</li><li>max: maximum value</li><li>avg: average (mean) value</li><li>stdev: standard deviation of values</li><li>range: range of values (max - min)</li><li>sum: sum of all values from raster</li></ul>"
  }],
  "examples": [{
    "expression": "raster_statistic('lc',1,'avg')",
    "returns": "Average value from band 1 from 'lc' raster layer"
  }, {
    "expression": "raster_statistic('ac2010',3,'min')",
    "returns": "Minimum value from band 3 from 'ac2010' raster layer"
  }],
  "tags": ["raster", "statistics"]
}