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.

本数据集所包含的多边形要素，表征三维勘探（3D surveys）的轮廓范围。这些多边形轮廓虽展示了勘探范围的大致形态，但并未采用统一的定义规范。此类多边形源自各类勘探报告，但其所表征的对象可能为地表覆盖范围、全褶皱覆盖范围，甚至是最终的勘探网格布设方案。除用于指示勘探范围之外，使用此类多边形时需格外审慎。