Architectural design symbols, PDF document, A4 size, detailed blueprints, grid paper background, various icons, 2D floor plans, building sections, elevations, orthogonal views, dimensions marked in meters, centimeters, inches, feet, bold black lines, thin gray guidelines, annotations in red ink, architectural fonts, sans-serif typography, modern minimalist style, professional tone, precise measurements, urban planning context, cityscape background, skyscrapers, low-rise buildings, green spaces, infrastructure, transportation systems.