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Web Map Ground Resolution Calculator
Online web map ground resolution calculator. Spherical Earth radius 6371.0088 km unless another radius is displayed. Not an ellipsoidal survey or real-time navigation service.
Your results will appear here.
Three steps. That’s it.
A useful toolkit for text, data, images and calculations.
- 01
Add your input
Choose a tool, enter values or select a file.
- 02
Make it yours
Adjust the options and run the action.
- 03
Take the result
Copy the result or download its file.
web map ground resolution calculator online
Use web map ground resolution calculator online for latitude deg, zoom, tile pixels. Spherical Earth radius 6371.0088 km unless another radius is displayed. Not an ellipsoidal survey or real-time navigation service.
How to use it
Enter latitude deg. Set zoom, tile pixels. Select Calculate and check the labeled output. Copy or download the JSON result.
Options and example settings
Calculation method
ground_m_per_pixel = 2*pi*6378137*cosd(latitude_deg)/(positive(tile_pixels)*2^integer(zoom,0,22)) (^ means exponentiation; trig functions ending in d use degrees).
Worked examples
Apply web map ground resolution calculator to the case below, keeping the displayed units and assumptions. Spherical Earth radius 6371.0088 km unless another radius is displayed. Not an ellipsoidal survey or real-time navigation service.
Web Map Ground Resolution Calculator — worked case
Settings: zoom: 10; tile pixels: 256
Input:
41.3
Calculated result for these inputs:
Output:
{
"ground_m_per_pixel": 114.84879564449263
}Choose the right tool
Choose great-circle tools for shortest spherical paths and rhumb tools for constant bearings. Spherical models differ from ellipsoidal survey calculations. Web-map tiles have latitude limits and grid bearings require a stated convergence convention.
Limitations and common mistakes
- Spherical Earth radius 6371.0088 km unless another radius is displayed. Not an ellipsoidal survey or real-time navigation service.
- Use the displayed unit in every field. Ratios and percentages are different inputs; percent fields use values such as 25 rather than 0.25.
Frequently asked questions
How can I use web map ground resolution calculator online?
Enter latitude deg. Set zoom, tile pixels. Select Calculate and check the labeled output. Copy or download the JSON result.
Technical references
Where is my input processed?
The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.
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