Seismic 3D Survey Areas - for Petroleum Industry Exploration

The polygons depict the outline of 3D surveys. These outlines illustrate the survey outlines but are not consistently defined. The polygons have been extracted from survey reports but may illustrate surface coverage, full fold coverage or even the final grid definitions. Care should be exercised when using these polygons for anything other than an indication of survey extent.

本数据集包含的多边形用于表征三维勘探（3D surveys）的轮廓范围。此类轮廓仅用于示意勘探范围，并无统一的定义规范。该类多边形源自勘探报告，但可用于表征地表覆盖范围、全褶皱覆盖（full fold coverage）范围，乃至最终网格定义（grid definitions）。若将此类多边形用于勘探范围示意以外的其他用途，需格外谨慎。