GIS coordinate precision distance calculator

Calculate latitude grid spacing and longitude grid spacing with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use latitude grid spacing and longitude grid spacing to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Decimal places
5
Latitude (degrees)
45
Spherical earth radius (m)
6371008.8
Latitude grid spacing (m)
1.111951
Longitude grid spacing (m)
0.786268
Maximum rounding displacement (m)
0.680928

Try another scenario

Decimal places
6
Latitude (degrees)
45
Spherical earth radius (m)
6371008.8
Latitude grid spacing (m)
0.111195
Longitude grid spacing (m)
0.078627
Maximum rounding displacement (m)
0.068093
Calculation method

Calculation method

Latitude grid spacing (m)

R pi/180 ×10^−decimal places.

Longitude grid spacing (m)

Latitude spacing×abs(cos(latitude)).

Maximum rounding displacement (m)

Half grid-cell diagonal under local spherical approximation.

Symbols and units
a
Decimal places
b
Latitude (degrees)
c
Spherical earth radius (m)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Decimal places, latitude, earth model. Returns Approximate coordinate quantization distance. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Decimal places: minimum 0, maximum 12. Latitude (degrees): minimum -90, maximum 90. Spherical earth radius (m): minimum 1e-12, maximum 1000000000000.0.
Are these inputs private?

These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.

Share this page
Share this calculator

Leave unchecked to share the page without your entered values.