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.

本数据集所采用的多边形用于描绘三维勘探（3D surveys）的轮廓边界。此类轮廓仅用于示意勘探范围，但未做统一规范定义。该类多边形均从勘探报告中提取而来，但其表征的内容可能为地表覆盖范围、全褶皱覆盖范围，甚至是最终的网格定义。若将此类多边形用于勘探范围示意之外的其他用途，则需格外审慎。