science

National Geographic Institute (Spain)

National Geographic Institute (Spain) is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand National Geographic Institute (Spain) rather than just read about it. In short: The National Geographic Institute (Spanish: Instituto Geográfico Nacional, IGN) is a government agency of the Spanish Ministry of Transport. Founded in 1870, it is the national mapping agency for Spain, together with the National Center for Geographic Information (Centro Nacional de Información Geográfica, CNIG).

Key takeaways

National Geographic Institute (Spain) belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect National Geographic Institute (Spain) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of National Geographic Institute (Spain) from memory before moving on to harder problems.

Reference excerpt

The National Geographic Institute (Spanish: Instituto Geográfico Nacional, IGN) is a government agency of the Spanish Ministry of Transport. Founded in 1870, it is the national mapping agency for Spain, together with the National Center for Geographic Information (Centro Nacional de Información Geográfica, CNIG). Since 2015, most of its products (including MTN50 and MTN25 topographic maps, and PNOA aerial photographies) are freely available online, and licensed under a CC-BY-4.0-like license, as FOM/2807/2015 decree requires its products must be released under a free license.

Roles

The IGN is responsible for:

Astronomic observations and research. Manages the Yebes Observatory, devoted to radio astronomy. Observation and maintenance of the national geodetic networks Making and updating the cartography for the country (including official National Topographic Maps, called MTN50 (1:50,000 scale) and MTN25 (1:25,000 scale)) Making and maintaining the Spanish Spatial Data Infrastructure (Infraestructura de Datos Espaciales de España, IDEE) R&D and application of teledetection systems Geophysics and gravimetry Seismographic and volcanic activity analysis

Main products

MTN50 MTN50, acronym for Mapa Topográfico Nacional (National Topographic Map) scale 1:50,000, is produced by the National Geographic Institute (IGN), being obtained by direct processes of observation and measurement of the Earth's surface. It constitutes, together with the MTN25, the official basic cartography of Spain. It consists of a total of 1073 sheets. Its original publication began in 1875 and did not finish until 1968. In 1985, the updating of its sheets was stopped, to focus all efforts on the production of the then new National Topographic Map at a scale of 1:25,000 (MTN25). In 1999, the production of a new, completely renovated, MTN50 is resumed. This new MTN50 includes shading, and is generated by cartographic generalization processes, using digital technology, from the corresponding sheets of the MTN25. The publication of the first edition of this new digital MTN50 began in 1999, with sheet 605 (Aranjuez), and ended in 2010, with sheet 262 (Salvaterra de Miño), making a total of 1073 sheets.

MTN25 MTN25, acronym for Mapa Topográfico Nacional (National Topographic Map) scale 1:25,000, consists, as of October 2017, of 4,098 sheets in vector format and 4,102 in raster format, sheets of 5' latitude by 10' longitude, a distribution that inherits the distribution table of the MTN50, with each one of the MTN50 sheets being divided into four quarters that are identified with Roman numerals (each one of the quarters making a MTN25 sheet), with slight modifications for sheets that cover very little territory.

PNOA The National Plan for Aerial Orthophotography (Plan Nacional de Ortofotografía Aérea, abbreviated as PNOA) began in 2004 and aims to obtain digital aerial orthophotographs of the entire Spanish territory, with a fixed update period, currently 3 years. The resolution of orthophotos has been changing over time and since 2017 the resolution is at least 25 cm, although in some areas resolutions of 15 cm are reached. The PNOA is a cooperative project in which the Government of Spain and the Autonomous Communities participate. A single photogrammetric flight is carried out, and then a rigorous treatment of the data follows, in which technical specifications agreed upon by all the participating Public Administrations are complied. This approach of cooperative production between the different administrations is in accordance with the spirit of the Inspire Directive for the establishment of a Geographic Data Infrastructure in Europe, which seeks that the maximum level of detail of geographic information is captured only once and that it is shared openly among the different agents that need it.

General directors

Carlos Ibáñez e Ibáñez de Ibero (1870–1889) Severo Gómez Núñez (1917, 1921–1922) Rodolfo Núñez de las Cuevas (1974–1980) Julio Morencos Tevar (1980–1983) Emilio Murcia Navarro (1983–1984) Ángel Arévalo Barroso (1985–1994) José Teófilo Serrano Beltrán (1994–1995) Ricardo Díaz Zoido (1995–1996) José Antonio Canas Torres (1996–2002) Alberto Sereno Álvarez (2002–2012) Amador Elena Córdoba (2012–2018) Lorenzo García Asensio (2018–2025) Laura Barbas Calvo (2025–present)

References

External links Media related to Instituto Geográfico Nacional (España) at Wikimedia Commons

Official webpage Spain ortophotographies (PNOA) and National Topographic Maps (MTN50 (1:50,000 scale) and MTN25 (1:25,000 scale)) download website Gallery of MTN50 (first digital edition) maps of main Spanish cities, at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with National Geographic Institute (Spain)

Start with the simplest possible case. Write down what National Geographic Institute (Spain) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to National Geographic Institute (Spain) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about National Geographic Institute (Spain) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of National Geographic Institute (Spain)

In research: National Geographic Institute (Spain) appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses National Geographic Institute (Spain) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: National Geographic Institute (Spain) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Geography of Spain, Government of Spain, National mapping agencies, so understanding it makes those chapters shorter.
In everyday life: Look for National Geographic Institute (Spain) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study National Geographic Institute (Spain) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what National Geographic Institute (Spain) means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain National Geographic Institute (Spain) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is National Geographic Institute (Spain) in simple terms?

Why does National Geographic Institute (Spain) matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study National Geographic Institute (Spain)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on National Geographic Institute (Spain).