What is Earth's polar radius?

Earth's polar radius is the distance from the Earth's center to the mean geographic pole along the rotation axis, representing the semi-minor axis of a reference ellipsoid like WGS84.

A pole, also known as a rod or perch, is a traditional English unit of length equal to 16.5 feet or 5.0292 metres, commonly used historically in surveying and land measurement.

Why convert Earth's polar radius to poles?

Converting Earth's polar radius to poles helps relate precise geodetic measurements to traditional land measurement units, useful for historical survey data, cadastral records, and geodesy.

Convert Earth's Polar Radius to Pole - Online Length Unit Converter

Easily convert from Earth's polar radius to poles using our precise online unit converter tool. Ideal for geodesy, surveying, and historical land measurement.

Earth's polar radius

Pole

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Earth's polar radius to Pole Conversion Table

Earth's polar radius	Pole

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.

Earth's polar radius to Pole Conversion Table
Earth's polar radius	Pole

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What Is This Tool?

This converter allows you to transform values from Earth's polar radius, a geodetic measurement, into poles, a traditional English unit of length used historically in surveying and land measurement.

How to Use This Tool?

Enter the length value in Earth's polar radius you want to convert.
Select Earth's polar radius as the input unit and pole as the output unit.
Click convert to see the equivalent length expressed in poles.

Key Features

Converts length values from Earth's polar radius to poles accurately.
Supports geodetic and historical land measurement conversions.
Simple and browser-based, with instant results.
Uses official conversion factors aligned with standard geodetic definitions.

Examples

2 Earth's polar radius equals 2 × 1263973.7930486 = 2527947.5861 poles.
0.5 Earth's polar radius equals 0.5 × 1263973.7930486 = 631986.8965 poles.

Common Use Cases

Defining geodetic reference ellipsoids and GPS coordinate conversions using poles.
Relating modern geodetic data to historical British and colonial land measurements.
Updating cadastral records by converting rods/poles to metric units.
Interpreting dimensions in historical agricultural and surveying documents.

Tips & Best Practices

Understand that poles are mainly used for historical or cadastral analysis.
Use the tool for reconciling global geodetic parameters with older land records.
Check unit contexts carefully when working with legacy survey data.
Remember that the Earth's polar radius is a fixed geodetic constant.

Limitations

Pole is a regional and historical unit not commonly used in modern measurements.
Earth's polar radius is fixed and may not reflect local topographical variations.
Conversion precision depends on fixed values; minor rounding differences can occur.

Frequently Asked Questions

What is Earth's polar radius?: Earth's polar radius is the distance from the Earth's center to the mean geographic pole along the rotation axis, representing the semi-minor axis of a reference ellipsoid like WGS84.
What is a pole unit?: A pole, also known as a rod or perch, is a traditional English unit of length equal to 16.5 feet or 5.0292 metres, commonly used historically in surveying and land measurement.
Why convert Earth's polar radius to poles?: Converting Earth's polar radius to poles helps relate precise geodetic measurements to traditional land measurement units, useful for historical survey data, cadastral records, and geodesy.

Key Terminology

Earth's polar radius: The distance from Earth's center to the mean geographic pole along the rotation axis, representing the semi-minor axis of a reference ellipsoid.
Pole: A traditional English unit of length equal to 16.5 feet or 5.0292 metres, used historically in surveying and land measurement.
Conversion rate: The factor used to convert from Earth's polar radius to poles: 1 Earth's polar radius equals 1,263,973.7930486 poles.

Quick Knowledge Check

What does the Earth's polar radius represent?

Average radius to the equator

Distance from Earth's center to mean geographic pole

Length of Earth's equatorial circumference

What is a pole also known as?

Bar

Rod or perch

Chain

In which field is converting Earth's polar radius to poles particularly useful?

Modern construction planning

Historical land surveying and cartography

Astronomy and deep space navigation

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