Atlas nacionales, recursos naturales y medio ambiente

Summary

This article reconsiders the purpose, content, and production of national atlases in light of advances in cartography, computing, and remote sensing, drawing on the author’s experience with the National Atlas of Spain. Traditional geographical atlases were primarily descriptive and often compiled by technical specialists rather than geographers. Although specialists supply essential subject knowledge, effective thematic mapping requires geographical analysis to select reliable sources, process and normalize data, determine appropriate spatial units, and choose suitable forms of representation. Insufficient geographical coordination can therefore produce maps of limited utility and hinder an atlas project. The article argues that modern national atlases should integrate three dimensions: general geographical information, natural resources, and the environment. This broader conception responds to the needs of policymakers, economists, sociologists, technicians, researchers, and citizens who require an accurate understanding of national conditions. Resource atlases are particularly important in countries with limited or unreliable information, but their preparation may demand extensive field surveys and direct verification. Aerial photography, satellite imagery, and image-combination techniques can accelerate the identification of crops, forests, mineral deposits, and other resources; nevertheless, expert interpretation remains indispensable, especially when phenomena such as soils are inferred indirectly. Environmental mapping should cover natural conditions, human-modifiable elements, natural hazards, ordinary economic activities, and physical degradation caused by natural or human action. The greatest challenge lies in mapping pollution, forest degradation, ecological imbalance, and landscape impoverishment because relevant observations are often sparse, unevenly distributed, and insufficiently precise. Such maps should identify both overall states or trends and local areas requiring urgent intervention, and they must be updated frequently because they depict changing conditions. The proposed atlas may also include small-scale topographic maps that provide a synthetic view of relief, hydrography, settlements, administration, and transport while serving as a common geographical reference for thematic layers. Stable phenomena, including geology, soils, and climatology, can be treated as conventional “author maps.” Dynamic phenomena derived from dated numerical or graphic data should instead be designed for automated production and regular revision. Automated cartography can generate qualitative, quantitative, isoline, and statistical maps efficiently, but direct scale reduction may erase spatially small yet significant information. Specialist geographers should therefore supervise thematic generalization and final design. The article concludes that national atlases must be accurate, economical, renewable, and readily legible, functioning not merely as descriptive collections but as practical instruments for planning, environmental protection, public understanding, and national self-representation.