A long reed is a traditional unit of length once used in land surveying and local measurements, whose exact value varied by place and time.

What does Earth's polar radius represent?

Earth's polar radius is the distance from Earth's center to the geographic pole, used as the semi-minor axis in geodetic models like WGS84.

Why convert long reeds to Earth's polar radius?

Converting long reeds to Earth's polar radius helps translate historical land measurements into modern geodetic terms for mapping and satellite navigation.

How to Convert from Long reed to Earth's polar radius

Learn how to convert the historical unit 'long reed' into Earth's polar radius, bridging legacy land measurements with modern geodetic standards using a precise unit converter.

Long reed

Earth's polar radius

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Long reed to Earth's polar radius Conversion Table

Long reed	Earth's polar radius

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Long reed to Earth's polar radius Conversion Table
Long reed	Earth's polar radius

Explore More Length Units Converter

What Is This Tool?

This tool converts measurements from the long reed, a traditional unit of length once used in land surveying, into Earth's polar radius, a geodetic standard used in modern mapping and satellite navigation.

How to Use This Tool?

Enter the measurement value in long reeds into the input field
Select 'long reed' as the source unit if necessary
Choose 'Earth's polar radius' as the target unit
Click 'Convert' to obtain the equivalent distance in terms of Earth's polar radius
Use the results to aid historical land measurement analysis or geodetic calculations

Key Features

Converts legacy long reed units into Earth's polar radius
Supports integration of historical land data with modern geodetic references
Browser-based and easy to use without installation
Provides examples for practical conversion scenarios
Explains unit definitions and historical context

Examples

10 Long reeds equals 10 multiplied by 5.0346268242539e-7, resulting in 5.0346268242539e-6 Earth's polar radius
100,000 Long reeds equals 100,000 times 5.0346268242539e-7, which is 0.050346268242539 Earth's polar radius

Common Use Cases

Interpreting historical land deeds and surveying records with legacy units
Restoring property boundaries based on old measurement references
Supporting geodetic reference ellipsoid definitions and GPS mapping
Satellite orbit modeling and Earth-shape research
Research in regional measurement systems and local standards

Tips & Best Practices

Confirm the historical context for the long reed to ensure accurate interpretation
Use the standardized Earth's polar radius value based on a recognized ellipsoid like WGS84
Apply conversions to enhance compatibility between legacy data and modern coordinate systems
Double-check units and values before using for legal or engineering purposes
Leverage examples provided to understand conversion scales

Limitations

Long reed values vary historically by location and period, so numerical conversions are approximate
Earth's polar radius is a fixed constant based on ellipsoid models and assumes standard definitions
The tool does not account for local variations or non-standard long reed definitions
Conversions should be used carefully when precise measurements are required

Frequently Asked Questions

What is a long reed?: A long reed is a traditional unit of length once used in land surveying and local measurements, whose exact value varied by place and time.
What does Earth's polar radius represent?: Earth's polar radius is the distance from Earth's center to the geographic pole, used as the semi-minor axis in geodetic models like WGS84.
Why convert long reeds to Earth's polar radius?: Converting long reeds to Earth's polar radius helps translate historical land measurements into modern geodetic terms for mapping and satellite navigation.

Key Terminology

Long reed: A historical unit of length used in land surveying and measurements, with variable magnitude depending on locality and era.
Earth's polar radius: The distance from Earth's center to its geographic pole, representing the semi-minor axis of the reference ellipsoid used in geodesy.
WGS84: A widely used geodetic reference ellipsoid model defining Earth’s shape and size, including the polar radius.

Quick Knowledge Check

What type of unit is the long reed?

A modern SI unit

A traditional unit of length

A weight measurement

Earth's polar radius corresponds to which geodetic feature?

Semi-minor axis of Earth’s ellipsoid

Distance across the Equator

Height of Earth’s mountains

Why are conversions from long reed approximate?

Because long reed values differ by region and time

Because Earth's polar radius changes frequently

Because conversion formulas are unknown

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