B E Z I T O P O

Bezitopo 0.1.1 consists of two programs, bezitopo and convertgeoid. Bezitopo does about the same as in 0.1.0:

• Read a coordinate file, make a TIN, and output contours, both in colorful raster plot and in PostScript.
• Check closure of a straight-line traverse or lot boundary.
• Convert a coordinate file or individual measurements from feet to meters or vice versa.
• Convert a coordinate file from PNEZD format to PENZD format.
• Given a point in the coverage of the geoid files, compute its elevation factor.

Convertgeoid has been greatly extended since 0.1.0 and now does the following:

• Convert geoid files from any of the following to each other and to boldatni format.
• US National Geodetic Survey binary
• Carlson Geoid Separation File
• US National Geospatial-Intelligence Agency text (name subject to change, as this .grd format seems to be more general than NGA)
• US National Geospatial-Intelligence Agency binary (whole earth, so can't write).
• When writing a geolattice file, change the fineness of the latitude and longitude, independently. For instance, you can make a GSF excerpt of the Alaska geoid file around Yakutat with the longitude sampled once every two minutes, but the latitude once every minute, which is a square lattice at 60°N.
• Given a geoid file and any number of small circles (a latitude-longitude pair and a radius), make an excerpt of the geoid file with just enough to contain all the circles.
• When writing a geoid file, also write a KML file so that you can see what area it covers.

Screenshots

These are of the Marble program displaying KML files output by convertgeoid.

Outline of a boldatni excerpt around Macksville, Kansas

convertgeoid g2012bu0.bin -c 38N99W 150km -f bol -o Macksville.bol

Outline of a GSF excerpt around Macksville, Kansas

convertgeoid g2012bu0.bin -c 38N99W 150km -f gsf -o Macksville.gsf

Download

• Tarball
• Signature
• Windows executables

System requirements

Requires CMake 2.8.12 or later and a C++ compiler that understands string::pop_back.

DragonFly BSD: It works on 4.5.0 and 4.9.0.

Debian and derivatives: Jessie or later. See /etc/debian_version . Ubuntu Xenial's Debian version is Stretch.

Release build status

• Ubuntu Xenial x86_64: It builds and works well.
• DragonFly BSD 4.9.0 x86_64: It builds and works well.
• Raspbian Jessie: It builds and works, but the geoidboundary test takes longer than CTest has patience for.
• Windows 7 64-bit: Cross-compiled on Linux, it works well.