GeoJSON Guides
GeoJSON Geometry Types Explained: Points, Lines, Polygons & More
A complete guide to all seven GeoJSON geometry types — what they are, how to structure them, and when to use each one.
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Your Guide to GeoJSON, Maps & Geospatial Data
GJ2 Geo
GJ2 Geo is your comprehensive resource for GeoJSON, geospatial data formats, mapping APIs, and geographic information systems. Explore in-depth tutorials, format guides, tool comparisons, and practical how-tos for working with maps and location data.
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Mapping Tools
Leaflet vs. Mapbox GL JS: Which Mapping Library Should You Use?
A practical comparison of Leaflet and Mapbox GL JS — covering rendering, performance, ease of use, licensing, and...
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Geospatial Tutorials
How to Perform Spatial Queries with Turf.js
Learn how to use Turf.js to run powerful spatial queries — including point-in-polygon, buffer, nearest-point, and...
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Data Formats
GeoJSON vs. Shapefile vs. KML: Choosing the Right Geospatial Format
Compare the three most popular geospatial data formats — GeoJSON, Shapefile, and KML — to understand their...
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APIs & Libraries
Getting Started with the Mapbox Geocoding API
A beginner-friendly guide to the Mapbox Geocoding API — covering forward geocoding, reverse geocoding, autocomplete,...
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Data Formats
TopoJSON vs. GeoJSON: When and Why to Use TopoJSON
Understand the key differences between TopoJSON and GeoJSON, how TopoJSON reduces file sizes through topology, and when...
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Dive deep into the topics that interest you most.
GeoJSON Guides
Deep dives into the GeoJSON specification — geometry types, feature collections,...
ExploreMapping Tools
Reviews and comparisons of mapping platforms, renderers, and editors — from Leaflet and...
ExploreGeospatial Tutorials
Step-by-step tutorials for working with location data, coordinate transformations,...
ExploreData Formats
Guides and comparisons of geospatial data formats including GeoJSON, TopoJSON, Shapefile,...
ExploreAPIs & Libraries
Explore mapping APIs, JavaScript libraries, and backend tools for processing, rendering,...
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