Dotted lines are existing contour lines, darker lines are proposed.

How to Design a Site Plan - Fine Homebuilding

Help Online - Origin Help - The (Plot Details) Line Tab

WCD - The stratosphere: a review of the dynamics and variability

What is the difference between proposed contour and existing contour? - Quora

Linework // 3 basic characteristics about lines in plan and section drawings

NCL Graphics: Lat/lon grid lines on maps

IJGI, Free Full-Text

Architectural Lines

What Different Line Types in Architecture & Design Drawings Mean – Board & Vellum

Equatorial Zone - an overview

Creating Architectural Grading (Cut and Fill) Plans - SketchUp - SketchUp Community