Custom Query (111 matches)

If surveys are dated and geolocated than a magnetic instrument correction can be automatically calculated.

As Survex has recently gained geolocation capabilities this is now a practical option. Therion has done this for a long time using the IGRF model coefficients and its own C++ code. Here is a C-library that may well do the trick: ​http://geomag.org/models/dmsp.html

Phil Maynard reports that on 10.6.8 the about dialog throws up an assertion failure when opened:

../src/osx/core/bitmap.cpp(1501): assert "IsOK()" failed in GetHeight(): invalid bitmap

If you answer "No" to "Do you want to stop the program?" you get the about dialog, but the cave image is missing (only image is the aven icon).

This sounds like it is failing to load aven-about.png - most of the code just quietly handles that, but the minimum height for the sizer is unconditionally set to the height of the bitmap. If I delete this image on Linux, I get the same assertion, so I've fixed that part in commit [4c0a0a22e7b890c84e2c1da4e182e5212ee1aa53/git].

That leaves the question of why the image is failing to load. I tested the about dialog worked on OS X at some point between 1.2.18 and 1.2.19, and didn't get this assertion, so it may be related to the OS X version, or to changes after that.

Currently the calibrate adjusts for the offset then multiplies by the scale factor, which works for a stretched tape with the end missing *calibrate tape 0.05 0.752

But of things like mounting a DistoX in a waterproof case the offset will be measured with another device so will not want scaling

Suggestion is to allow the addition of units to the offset if the scale factor should not be applied, this should allow the original format to continue to work while adding functionality.

if not units

real = ( reading - offset) * scale

If units eg *calibrate tape -0.05m 0.752

real = reading * scale - offset