# Old documentation

This directory contains older documentation for PROJ.

## Internal resources

The following resources are unpublished.

* [libproj.pdf](libproj.pdf) – Evenden, G. I. 2005. *libproj4: A Comprehensive Library of Cartographic Projection Functions*. Preliminary Draft.
* [proj_4_3.pdf](proj_4_3.pdf) –  Evenden, G. I. 1995. *Cartographic Projection Procedures, Release 4*. Interim Report.
* [proj_4_3_12.pdf](proj_4_3_12.pdf) – Evenden, G. I. 1995. *Cartographic Projection Procedures, Release 4*. Second Interim Report.
* [SWISS.pdf](SWISS.pdf) – Evenden, G. I. 1995. *Supplementary PROJ.4 Notes, Swiss Oblique Mercator Projection*.


## External resources

The following resources were previously located in this directory, however are published externally.

* Evenden, G. I. 1995. Cartographic Projection Procedures for the UNIX Environment — A User's Manual. U.S. Geological Survey. <https://pubs.usgs.gov/of/1990/of90-284/ofr90-284.pdf>
* Snyder, J. P. 1987. Map projections — A working manual. Professional Paper 1395, U.S. Geological Survey. [doi:10.3133/pp1395](https://doi.org/10.3133/pp1395)