MH is used on survey drawings to indicate a Manhole. Manholes are access points to underground utilities like sewers or drainage lines, allowing maintenance and inspection from above ground. The label helps crews locate these access points quickly during surveys or construction. The other terms aren’t standard labels for plan notation in this context (Main Hazard, Meter Hole, Material Holder), so they don’t fit as well.

Understanding survey codes involves recognizing how abbreviations map to the survey type. The code Fis is tied to Fishpond, so it points to Fishpond Application Surveys. This matches the language used in surveying where the code often reflects a key word in the term. The other options describe different survey types (Political Boundary Portion Establishment, Relocation, Friar Lands Relocation) whose abbreviations wouldn’t start with Fis, so they don’t align with the code Fis.

In survey notation, two-letter codes on maps and records often encode the type of action and who filed it. Here, the first letter S points to Sales, and the second letter identifies the applicant category. The combination Sc is used to denote a Sales Application filed by a Corporation, making it the clear fit for this code. It distinguishes corporate sales filings from other possibilities such as individuals or other processes, which would use different second letters or different codes altogether. The other phrases described don’t follow the common labeling pattern for sales-related transactions on survey documents, so they don’t align with what Sc typically represents.

A scale bar is a graphic ruler on the drawing that shows the relationship between map distances and real-world distances, so you can measure directly on the sheet. It allows you to translate a length you see on the drawing into a real distance by reading how many units of real distance correspond to the length along the bar. This is especially handy because you can use a ruler on the bar to measure without needing to do math or convert a numeric ratio, and it stays usable at the current print size. Options that show direction, symbols, or elevation differences serve different purposes: a north direction indicator shows orientation, a legend explains symbols, and contour intervals indicate vertical spacing between elevation lines.