Question

Why are Form Lines drawn as dashed or broken lines rather than solid lines?

• A. To mark the boundary of a survey zone
• B. To show they represent underwater features
• C. To distinguish them as estimated elevations
• D. To indicate they are exact measurements

Answer 1

Answer:

C. To distinguish them as estimated elevations

• In cartography, the graphic variable of "continuity" is used to communicate the level of certainty. Solid lines represent observed, measured, and verified data (quantitative), whereas dashed lines represent interpolated or sketched data (qualitative).