[OSGeo-Discuss] Looking for contributors

Pierre Abbat phma at bezitopo.org
Fri Feb 14 03:58:28 PST 2020

On Friday, 14 February 2020 06.18.23 EST Jody Garnett wrote:
> Thanks for reaching out Pierre:
> Perhaps you could spend a moment introducing the projects and describe what
> they are used for?

Bezitopo is a CAD package under development specifically designed for land 
surveying. It does not aim at compatibility with general-purpose CAD packages, 
so it does not have, for example, ellipses, but does have Euler spirals, which 
are used in highway design (and which Bezitopo uses to smooth contours). It 
consists of several programs:
bezitest, a test program;
bezitopo, a command-line program, which I use for checking closure and 
converting PNEZD to/from PENZD;
clotilde, which computes approximations to spirals;
convertgeoid, which converts and excerpts geoid files;
pangeoid, which will be a GUI version of convertgeoid but yet does nothing;
sitecheck, which reads a TIN and would let you walk around it with a GPS 
system, if it had a way of interfacing to one;
transmer, which computes transverse Mercator coefficients;
viewtin, which will become the CAD program (to be renamed bezitopo or 

PerfectTIN, which I started a year ago by copying large hunks of Bezitopo 
code, reads a point cloud representing terrain and computes a TIN which 
approximates the point cloud to within a specified tolerance. You can then read 
the TIN into SiteCheck and compute the elevation at any XY coordinate in the 
TIN. A friend of mine, who sells surveying equipment, has a possible customer 
for the program. Since I posted two weeks ago, I got the quarter function 
working and have almost eliminated the spikes that PerfectTIN was producing.

ve ka'a ro klaji la .romas. se jmaji

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