PJConverter
Projection Convert Tool
$0.99 · Designed for iPad. Not verified for macOS.
Your pro coordinate conversion tool. Powered by PROJ with 1000s of built-in systems & custom projection support. Accurate & reliable for GIS and surveying pros.
PJ Converter is the ultimate coordinate conversion tool designed for professionals and students in Geographic Information Systems (GIS), surveying, engineering, and related fields. Whether
you're working with geodetic or projected coordinates, it delivers unparalleled accuracy and ease of use.
Key Features
* Professional-Grade Conversion Engine: Powered by the widely-used PROJ library to ensure every calculation is accurate and reliable. It supports forward, inverse, and full coordinate
transformation pipelines to meet the most demanding professional needs.
* Vast Coordinate System Library: Comes with thousands of built-in Coordinate Reference Systems (CRS) from authoritative sources like EPSG, covering the entire globe. The powerful search
helps you find what you need in seconds.
* Advanced Custom Projections: Need something specific? Easily create, edit, and manage your own projection definitions. The editor provides real-time syntax validation and ID conflict
detection to make complex configurations foolproof.
* Visual Projection Preview: Instantly generate a world map preview for any coordinate system. Visually assess a projection's distortion, area of use, and characteristics before you apply it.
No more guesswork.
* Flexible Formatting: Seamlessly switch between degrees (DMS) and radians for geographic coordinates. Pick coordinates visually from an integrated map to meet diverse data input and display
requirements.
* Simple & Efficient Experience: The "Recents" list automatically saves your frequently used projections for quick access. The entire interface is clean and focused, letting you perform
conversions without distraction.
PJ Converter is the ideal choice for field engineers, GIS analysts, geography students, and anyone who works with spatial data.
Download now and make complex coordinate conversions simpler and more efficient than ever before.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This is a milestone update. PJ Converter has been rebuilt from the ground up using the latest SwiftUI technology, delivering a faster, more powerful, and more modern professional tool.
Here's what's new in this major update:
* [A FRESH NEW LOOK] Completely Redesigned UI
* The app has been rewritten entirely. It's faster, more responsive, and features a modern design with fluid animations.
* Native Dark Mode: Perfectly integrated with iOS Dark Mode for a more comfortable viewing experience in low-light conditions.
* [MAJOR FEATURE LEAP] More Powerful Conversions
* Degree/Radian Switching: Seamlessly switch geographic coordinates between degrees (DMS) and radians to meet diverse data requirements.
* Upgraded Map Picker: The map picker can now directly return values in degrees for a more intuitive workflow.
* [SMARTER MANAGEMENT] A More Professional Projection Library
* Real-Time Validation: The custom projection editor now validates your parameters in real-time and warns of potential ID conflicts, making configuration safer.
* Recents: Your most frequently used coordinate systems now automatically appear at the top of the list for quick access.
* [REWRITTEN CORE] A More Stable Foundation
We've overhauled the data layer for faster and more reliable access to your custom and recent projections. We've also introduced new observability tools, which will help us find and fix
issues even faster in the future.
We believe this upgrade will lead to a more efficient and enjoyable workflow. We hope you enjoy it.
The developer, Zhikang Qin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Zhikang Qin
- Size
- 6.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2025 Zach
