Search EPSG Coordinate Reference Systems (CRS) by keyword. Searchable by EPSG code, name, region name, or prefecture name. Covers Japanese JGD2011 CRS family, global WGS84, Web Mercator, and more.

Get detailed information for a specific EPSG code. Includes datum, projection method, area of use, accuracy characteristics, and intended use cases.

Get available CRS list for a region with purpose-based recommendations. Japan includes Plane Rectangular CS (Zones I-XIX), Global includes WGS84 and UTM zones.

Recommend the optimal CRS based on purpose and location. Supports web mapping, distance/area calculation, surveying, navigation, data exchange, etc. Full support for Japan Plane Rectangular CS (Zones I-XIX) including multi-zone regions like Hokkaido and Okinawa.

Validate whether a CRS is appropriate for a specific purpose and location. Detects deprecated CRS usage, area/distance calculation distortion issues, inappropriate zone selection for surveying, and provides improvement suggestions.

Suggest transformation paths between two CRS. Covers Tokyo Datum to JGD2011, WGS84 to Plane Rectangular CS, etc. Searches multi-step paths, provides accuracy info, and warns about cumulative errors.

Compare two CRS from various perspectives. Compares datum, projection method, area of use, accuracy, distortion characteristics, compatibility, and use case suitability. Explains which is better suited for specific purposes.

Get CRS best practices for specific topics. Covers surveying in Japan, web mapping, data exchange, coordinate storage, mobile GPS, cross-border data, historical data, GIS integration, precision requirements, and projection selection. Provides recommended practices, common mistakes, and reference materials.

Troubleshoot CRS-related problems. Diagnoses coordinate shifts (cm, m, km scale), area/distance calculation errors, data not displaying, and transformation errors. Identifies causes, provides diagnostic steps, and solutions.