Relief shown by hachures and spot heights in meters. Depths shown by isolines Titles on upper left corner on sheets: Central America Nicaragua; Central America Nicaragua-Costa Rica; Central America Costa Rica; Central America Costa Rica-Panama; Central America Guatemala-Mexico; Central America Guatemala-El Salvador; Central America Honduras; Central America Guatemala-Honduras-Honduras-El Salvador; Central America Honduras-Nicaragua; Central America Salvador-Honduras-Nicaragua; Central America Nicaragua-Honduras. Shows three classes of roads, six classes of railroads, three types of boundaries, and telephone and telegraph lines Each sheet has personal statements of attribution. Standard map series designation for sheets published in 1947: E501. Sheets issued 1929-1941: Map no. 107 Includes index to sheets.