Geographic Coordinate Converter

Tool Introduction

The "Geographic Coordinate Converter" is a convenient and efficient online tool specifically designed for geographic location data processing and coordinate conversion. It can achieve precise conversion between various mainstream geographic coordinate systems, including the internationally used WGS84 coordinate system (commonly used in GPS devices, Google Earth, etc.), the GCJ02 coordinate system widely used in China (Amap, Tencent Maps, Meituan Maps, etc.), and the BD09 coordinate system (Baidu Maps). Whether you are engaged in map development, data analysis, route planning, or daily queries, this tool can provide reliable coordinate conversion services, ensuring the accuracy and compatibility of your data, making it a powerful assistant for geographic information processing.

How to Use

1. Select Coordinate System: On the tool interface, first select the "Original Coordinate System" type of your current input coordinates (e.g., WGS84), then select the "Target Coordinate System" type you wish to convert to (e.g., GCJ02).
2. Enter Coordinates: In the specified input box, enter the geographic coordinates you want to convert in the format of "longitude,latitude". For example: 116.397499,39.908744. Please ensure the correctness, order (longitude first, latitude second), and precision of the longitude and latitude values.
3. Execute Conversion: Click the "Convert" button. The system will perform precise algorithmic calculations based on the coordinate system you selected and the coordinates you entered.
4. View Results: The conversion results will be displayed instantly in the output area, usually also presented in the "longitude,latitude" format, with the corresponding coordinate system clearly marked. You can directly copy the converted coordinates for use in other applications.

Frequently Asked Questions

• Q: Why is there a discrepancy between the coordinates I obtained from a GPS device (WGS84) in mainland China and the location displayed on the map?
• A: This is because all public map services in mainland China must use the encrypted GCJ02 coordinate system (also known as the "Mars Coordinate System"). Your GPS device outputs WGS84 coordinates, which have an offset from GCJ02. This tool aims to solve this coordinate system incompatibility issue by converting WGS84 to GCJ02 or BD09, ensuring compatibility with map services.
• Q: What input/output formats does this tool support?
• A: This tool primarily supports "longitude,latitude" text format for input and output, with longitude and latitude separated by an English comma. We encourage users to use high-precision decimal form for more accurate conversion results.
• Q: What is the accuracy of coordinate conversion? Is it completely accurate?
• A: This tool uses publicly available and widely validated coordinate conversion algorithms, with high conversion accuracy. However, due to algorithmic characteristics, data sources or updates from map service providers, and subtle differences in coordinate system definitions, the conversion results may have tiny millisecond-level errors. This is normal and usually does not affect daily use.

Important Notes

• Input Format: Please ensure that the input coordinate format is "longitude,latitude", i.e., longitude first, latitude second. Incorrect formats (e.g., latitude first, or using a Chinese comma) will lead to conversion failure or inaccurate results.
• Coordinate System Selection: Before performing the conversion, please carefully check and correctly select the "Original Coordinate System" to which your input coordinates belong and the "Target Coordinate System" you wish to convert to. Selecting the wrong coordinate system will lead to completely incorrect conversion results and a huge deviation from the actual location.
• Data Privacy: This tool is an online tool and does not store any user input data. All conversions are processed instantly in your browser or on the server side, so please feel free to use it. Your geographic location information will not be recorded or shared.
• Network Connection: Using this geographic coordinate converter requires a stable network connection to load the page and perform conversion operations. Please ensure your network environment is good.