![]() ![]() The spacing of the grid depends on the survey method, the extent of the site, and the desired resolution of information (ie, a smaller grid spacing will provide a more detailed reading of the site topography). To produce topographic base data, a grid is laid out across a site. The overview below provides a summary of the process to go from a grid-based survey of elevations to a topographic contour map. Topographic data is acquired through numerous methods, but the grid is a commonality between most digital methods (eg, LiDAR) and more traditional methods (eg, rod & level). The topographic map is used to interpret, visualize, analyze, and design the landscape as well as to site program / buildings / other features. A topographic map or digital model is fundamental to most interventions in the built world. ![]()
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