2.2.3.16 SPRC

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A SPRC is a unit of measurement that is 1/4000th of the height or width of the chart (section 2.2.3.3). If the field is being used to specify a width or horizontal distance, the SPRC is 1/4000th of the width of the chart. If the field is being used to specify a height or vertical distance, the SPRC is 1/4000th of the height of the chart.