산경GPS

It supports the user's location as GRS80 coordinates by utilizing the GPS of the smartphone, converts the polylines and text files of the CAD file to Lisp, and imports them from the app to check the location on the spot. You can save points and photo movement paths and convert them to CAD files through Lisp, making it easy to edit and use.

To use, download the app, sign up for Naver https://cafe.naver.com/skgps, and request a subscription application.

map selection
- Supports Naver-based general maps, satellite maps, topographic maps, cadastral maps, and hiking trail maps.

coordinate system
- It supports BESSEL coordinate system and GRS80 coordinate system, and it is possible to convert the coordinate system at once.

point recordkeeping
- You can save points and export them to mail or KakaoTalk, and Excel files and nerve files are supported.

photo management
- You can save photos and dots and export them to KakaoTalk, and Excel files and nerve files are supported.

line record management
- Lines are saved along the moving line so that you can check the track, and Excel files and nerve files are supported.

There are import and vertex settings.

Precautions
The coordinates in the app are not accurate and have errors. It cannot be used for the survey of boundary coordinates, and it shows performance similar to GPS for general navigation.
When using this app, the smartphone's battery may be discharged prematurely, and the location error increases if the app's screen is turned off in the background mode and if it is not easy to receive radio waves from a pocket, etc.