Evidence map›Paper›PMID 16578734›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1975

Stochastic models for the Earth's relief, the shape and the fractal dimension of the coastlines, and the number-area rule for islands.

B B Mandelbrot

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1975. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

38 citing papers in PubMed.

  1. Article
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  4. Fractal Analysis in Neurodegenerative Diseases.Advances in neurobiology · 2024
    Article
  5. The Fractal Geometry of the Brain: AnOverview.Advances in neurobiology · 2024
    Article
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  17. The fractal geometry of bronchial trees differs by strain in mice.Journal of applied physiology (Bethesda, Md. : 1985) · 2020
    Article
  18. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

1 author.

B B MandelbrotGeneral Sciences Department, IBM T.J. Watson Research Center, Yorktown Heights, New York 10598.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The degree of irregularity in oceanic coastlines and in vertical sections of the Earth, the distribution of the numbers of islands according to area, and the commonality of global shape between continents and islands, all suggest that the Earth's surface is statistically self-similar. The preferred parameter, one which increases with the degree of irregularity, is the fractal dimension, D, of the coastline; it is a fraction between 1 (limit of a smooth curve) and 2 (limit of a plane-filling curve). A rough Poisson-Brown stochastic model gives a good first approximation account of the relief, by assuming it to be created by superposing very many, very small cliffs, placed along straight faults and statistically independent. However, the relative area predicted for the largest islands is too small, and the irregularity predicted for the relief is excessive for most applications; so is indeed the value of the dimension, which is D = 1.5. Several higher approximation self-similar models are described. Any can be matched to the empirically observed D, and can link all the observations together, but the required self-similarity cannot yet be fully explained.

Identifiers

PMID16578734
PMCPMC433088

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.