Standard map, architectural, and engineering scales — standard_scales • overedge

Standard map scales derived from USGS 2002 report on map scales https://pubs.usgs.gov/fs/2002/0015/report.pdf

Usage

standard_scales

Format

A data frame with 32 rows and 16 variables:

scale: Scale name
standard: Standard (USGS, architectural, or engineering)
series: Series name (USGS map scales only)
actual_ft: Scale distance for 1 ft actual.
actual_ft_unit: Unit of scale for 1 ft actual.
scale_in: Actual distance for 1 in scale.
scale_in_unit: Unit of actual distance for 1 in scale.
scale_in_accuracy: Accuracy of 1 in scale (approximate or exact)
scale_cm: Actual distance for 1 cm scale.
scale_cm_unit: Unit of actual distance for 1 cm scale.
scale_cm_accuracy: Accuracy of 1 cm scale (approximate or exact)
size_latlon: Standard size in latitude/longitude
size_latlon_unit: Unit of latitude/longitude size (minutes or degrees)
area_approx: Approximate actual area
area_approx_unit: Approximate area unit
series_status: Series status (select USGS map series are "abandoned")

Details

Common architectural and engineering scales derived from FEMA guide to using scales https://www.usfa.fema.gov/downloads/pdf/nfa/engineer-architect-scales.pdf