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Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...

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Related Experiment Video

Updated: Jun 13, 2026

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

Published on: January 14, 2020

Holographic maps.

|April 17, 2010

Summary

This summary is machine-generated.

This study presents a novel synthetic field hologram, synthesized from 2-D transparencies, which maintains high diffraction efficiency. This advanced hologram technology can be reconstructed in white light and applied to create holographic land maps.

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Last Updated: Jun 13, 2026

Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

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Published on: January 14, 2020

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

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Area of Science:

Optics and Photonics
Holography
Digital Imaging

Background:

Traditional holography often faces limitations with diffraction efficiency as complexity increases.
Reconstruction of holograms typically requires specific lighting conditions, limiting practical applications.

Purpose of the Study:

To introduce a novel synthetic field hologram with unimpaired diffraction efficiency.
To enable white-light reconstruction of synthetic holograms.
To explore applications in creating holographic land maps.

Main Methods:

Synthesis of a synthetic field hologram from two-dimensional (2-D) transparencies.
Development of a method to ensure diffraction efficiency is not compromised by overlapping basic holograms.
Demonstration of white-light reconstruction capabilities.

Main Results:

A synthetic field hologram was successfully created.
The presented hologram exhibits unimpaired diffraction efficiency regardless of overlapping elements.
The hologram is reconstructible using white light.

Conclusions:

The developed synthetic field hologram offers a significant advancement in holographic technology.
The method provides a robust way to create complex holograms with high fidelity.
This technology has direct applications in cartography, specifically for holographic land maps.