Learn what a DXF file is, how DXF differs from DWG, why CRS matters in GIS, and how to open or convert CAD drawings to GeoJSON, KML, or Shapefile.
Learn what an OSM PBF file is, how it compares with OSM XML and GeoJSON, when to use regional extracts, and how to open or convert PBF data online.
Learn how to map the Trans-Siberian Railway and Pan-American Highway with OpenStreetMap, Python, Cartopy, and Matplotlib, including incomplete OSM relations.
Discover free global health facility and school location datasets including WHO Health Facilities, UNICEF Global Schools Map, HDX health data, and the Malaria Atlas Project.
Find free global natural hazards GIS data including USGS earthquakes, GEM faults, flood hazard maps, NASA FIRMS wildfires, and volcano records.
Download Overture Maps Foundation data by theme — Places, Buildings, Transportation, Addresses, Base, and Divisions — as GeoParquet or GeoJSON, then inspect it in GIS.
Learn to validate GeoJSON for RFC 7946 with the free online validator. Catch geometry, coordinate, and structural errors before publishing GIS data.
Learn how to convert coordinates between Decimal Degrees, DMS, UTM, and MGRS formats using the free online GeoDataViewer Coordinate Converter tool.
Discover free global air quality datasets including PM2.5 surface concentration maps, Sentinel-5P TROPOMI satellite pollutants, and CAMS atmospheric composition data.
Find free global cropland, irrigation, and crop production GIS data, including GFSAD30, FAO irrigation, SPAM, USDA CDL, and WorldCereal.
A guide to free global glacier inventory, snow cover, and sea ice datasets including the Randolph Glacier Inventory, MODIS Snow Cover, and NSIDC Sea Ice data.
Extract POIs from OpenStreetMap PBF or Overture Maps GeoParquet for EV charging stations, gas stations, and other places with practical GIS workflows.
Learn what GeoParquet is, why it works well for large geospatial datasets, how browser rendering works today, and where deck.gl fits next.
Convert DWG to GeoJSON step-by-step in your browser. Preview the layer, export GeoJSON, and troubleshoot common DWG conversion issues.
Step-by-step: open a Shapefile online in your browser, upload the required sidecar files, and troubleshoot missing .dbf/.shx/.prj issues.
Learn what an SHP file is, why a Shapefile also needs DBF, SHX, and PRJ files, and how to open or convert the complete dataset online.
What is an ESRI File Geodatabase (FileGDB)? Learn how its folder-based layers and tables work, how to open a zipped GDB, and how to convert it online.
What is GeoJSON and why is it common in web maps and APIs? Learn the file structure, geometry types, RFC 7946 rules, limitations, and how to view or validate it online.
What is a GeoPackage (GPKG) file? Learn why it replaces multi-file GIS formats, what it stores, and how to open or convert GeoPackage data online.
What is GML (Geography Markup Language)? Learn how OGC GML stores GIS features in XML and how to open, inspect, or convert GML files online.
What is a GPX file? Learn how GPS Exchange Format stores tracks, routes, and waypoints, and how to open or convert GPX online for maps and GPS apps.
What are KML and KMZ files? Learn how Google Earth formats store placemarks, paths, polygons, and overlays, and how to open or convert them online.
Learn what MapInfo TAB and MIF/MID files are, how sidecar files work, and how to open or convert MapInfo datasets online.