CL-PROJ: Lisp bindings for the Proj.4 library
PROJ.4 is a cartographic projections library originally written by Gerald Evenden then of the USGS. PROJ.4 has been placed under an MIT license.
CL-PROJ provides CFFI-based Common Lisp bindings for the PROJ.4 library. It is placed under the Berkeley Software Distribution (BSD) license meaning that you can do almost everything you want with it.
PROJ.4 homepage is: proj4.org
cl-proj can be installed using the Quicklisp system:
Library loading and linking into the Lisp image is performed automatically when it is loaded by ASDF/QuickLisp.
Symbols are defined in the
cl-proj package and are also available using the
pj package nickname.
Constants, variables and functions are extremely close to the PROJ.4. Bindings for geodesic functions are also provided in addition to the core Proj4 API. Reference is in the
Primary development platform is recent Ubuntu Linux distribution with recent versions of SBCL and ECL Common Lisps.
In addition to Proj4 library bindings this package a number of utility functions, including:
Parsing degrees from a string and conversion between degree-minutes-seconds and decimal representations
Simplification of polygons/polylines (reducing number of vertices) using the Ramer?Douglas?Peucker algorithm
Projecting points from a geographic space onto a screen with the given dimensions and viewport
Construction of circular lines with the given radius and center (like missile ranges, etc.)
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