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Merge pull request #3766 from nyalldawson/processing_context2
[processing] Fix hangs when running algorithms
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{ | ||
"name": "raster_statistic", | ||
"type": "function", | ||
"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"} | ||
] | ||
} |
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