Radon Data

<div style='text-align:Left;'><div><p><span>The polygons in this feature class are geologic map units assigned a radon potential rank, based on three major geologic factors: geologic materials, aerial radiometric measurement averages, and indoor air radon measurement averages.</span></p></div></div>本要素类内的多边形均为赋有氡潜力等级的地质图单元，其等级划分依据三大核心地质因素：地质物质、航空放射性测量平均值与室内空气氡测量平均值。