Coordinate Systems
Web Mercator common mistakes
This note is part of the Web Mercator topic in the Coordinate Systems section of the Knowledge Center.
Core checks for this topic
- Confirm the source coordinate reference system, datum realization and units before processing.
- Validate geometry, control points and attribute fields on a small sample first.
- Compare the processed sample with independently known coordinates or measurements.
- Record the method, parameters and tolerances used so the deliverable can be audited.
Full guides in Coordinate Systems
- UTM Coordinate System ExplainedFull article
- UTM Zones: Find the Right Zone and EPSG CodeFull article
- EPSG:4326 (WGS 84 Latitude/Longitude)Full article
- EPSG:3857 Web Mercator (Pseudo-Mercator)Full article
- Axis Order: Latitude/Longitude vs Longitude/LatitudeFull article