Geofan.org Toolset: Geographic Exploration, Travel, Development, and More
Explore the Geofan.org toolset. Whether you want to compare regional maps, mark your own map and export GeoJSON, measure distances, or calculate map areas, we have the right tool for you.
MapAnnotate: Interactive Map Annotation Tool
Add markers, shapes, and text to maps. Export your creations as PNG images for travel planning, education, or reports.
Map Area Calculator
Draw shapes on an interactive map to instantly calculate the area of any region. Supports multiple units for land surveying or planning.
River Marking & Length Calculation
Automatically detect, mark, and measure river lengths on an interactive map. Analyze waterways and export data as GeoJSON.
Mountain Marking & Height Calculation
Automatically detect, mark, and measure mountain heights. Visualize terrain and export data as GeoJSON.
Region Map Comparison
Visually compare the size and shape of two geographical areas. Perfect for understanding the relative scale of different places.
Map Distance Calculator
Select two points on the globe to visually compare their positions and calculate the distance between them.
Interactive Airport Map Comparison
Visually compare the size and shape of two airports. Supports fuzzy search by name, IATA, or ICAO code.
Coastline Length Calculator
Detect and calculate the length of the coastline in the current map view with customizable precision.
Airport Distance & Flight Time Calculator
Calculate the distance and estimate the flight time between two airports, visualizing their locations on a map.
JSON Compare Tool
A powerful online tool to highlight differences between two JSON objects, showing added, removed, and modified fields.
Why Use Our Geo-Tools?
Our tools are designed for accuracy, ease of use, and versatility, catering to professionals, students, and enthusiasts alike.
Precision and Accuracy
Leverage reliable geospatial data for precise calculations, from land area to flight distances.
Interactive Visualization
Don't just get numbers; see the data on interactive maps for better context and understanding.
Data Export
Take your work with you. Export your findings as GeoJSON for GIS software or as high-quality PNG images for reports.
Free and Accessible
All our tools are free to use without any registration required, available on any device with a web browser.