Class: GeoConcerns::Processors::Raster::Aig

Inherits:
Base
  • Object
show all
Includes:
Zip
Defined in:
app/processors/geo_concerns/processors/raster/aig.rb

Class Method Summary collapse

Methods inherited from Base

encode_queue, encode_raster, reproject_raster

Methods included from BaseGeoProcessor

#basename, #id, #label, #options_for, #output_size, #output_srid

Class Method Details

.encode(path, options, output_file) ⇒ Object 



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# File 'app/processors/geo_concerns/processors/raster/aig.rb', line 7

def self.encode(path, options, output_file)
  unzip(path, output_file) do |zip_path|
    info = Info.new(zip_path)
    options[:min_max] = info.min_max
    case options[:label]
    when :thumbnail
      encode_raster(zip_path, output_file, options)
    when :display_raster
      reproject_raster(zip_path, output_file, options)
    end
  end
end

.reproject_queue ⇒ Array

Set of commands to run to reproject the AIG.

Returns:

  • (Array) —

    set of command name symbols



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# File 'app/processors/geo_concerns/processors/raster/aig.rb', line 22

def self.reproject_queue
  [:warp, :translate]
end

.translate(in_path, out_path, options) ⇒ Object

Executes a gdal_translate command to translate a raster format into a different format with a scaling options. This command scales the min and max values of the raster into the 0 to 255 range. Scale is inverted (255 to 0) to create a better visualization.

Parameters:

  • in_path (String) —

    file input path

  • out_path (String) —

    processor output file path

  • options (Hash) —

    creation options



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# File 'app/processors/geo_concerns/processors/raster/aig.rb', line 33

def self.translate(in_path, out_path, options)
  execute "gdal_translate -scale #{options[:min_max]} 255 0 "\
            "-q -ot Byte -of GTiff \"#{in_path}\" #{out_path}"
end