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This website is unter permanent development. Mistakes cannot be excluded. All is done to detect and solve problems. If you detect any problem and want to support its solution, please send a short report. Hints and suggestions are always welcome.

≡ START Guide Deutsch There is a apparently a problem

with IN DUBIO PRO GEO in general Adjusting curves Adjusting surfaces Adjustment of a triangle Adjustment with observation equations Adjustment with observation equations Area stakeout Atmospheric EDM correction Bag of tricks Both lists Bounding circle/sphere Circular arcs Clear project Convex hull Coordinate conversion Coordinate lists Create lattice points Critical values for hypothesis tests Cuboid through four vertices Cylinder through seven points Double observations Duplicate project Earth curvature correction Ellipsoidal polygons Error and covariance propagation Error ellipses and ellipsoids Error propagation Famous Geodesists First steps Geodesics Geodetic abbreviations Geodetic computations on the ellipsoid of revolution Geodetic journals Geodätische und statistische Berechnungen Get in touch with IN DUBIO PRO GEO Gleichseitiges Dreieck-Raster Glossary Grid scale factors Hansen´s problem Homogenisation of correlated observations Imprint Incompletely connected traverse Information criteria Latitude dependent quantities Length of meridian arc Library Links List 1 List 2 List of authors List of guides Load HTW template project Load project Matrix computations Measurement lists Meridian convergence Milestones of Geodesy Neighbouring points Normal gravity formulae Number representations Numerical integrals Picture quiz Planar geodetic computations Planar polygons Planar quadrangles Planar triangles Project management Project overview Quadrilateral through five points Repeated levelling Repeated observations Report a problem Roots of polynomials Satellite orbits Save project Search Sets of angles and distances Settings Spatial geodetic computations Spatial geodetic sections Spatial line section Spatial polygons Special functions Special list Spherical triangles Square though four points Stakeout of circular arc Station centring Timeline Traverses Trilateration and multilateration Tutorial Unbelievable, but true - or not? Universal computer Vertical networks Vertical triangles World Geodetic System 1984 Transformation by control points Transformation by parameters

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If you have questions relating to your computation, e.g. because it did not yield the desired result, you may and send the link for loading it together with your question and your contact address. You will receive an answer within some hours.

≡ START Guide Deutsch List of known small problems not yet solved

• Sometimes using the back-button of the browser causes problems because computations cannot be correctly repeated due to data, which have been cleared or changed by now. Use the back-button with care!
• If you run IN DUBIO PRO GEO in different tabs of the same browser window then you work on the same project in all those tabs! This may be undesired. Sometimes this problem occurs, if a IN DUBIO PRO GEO project is loaded via an external link or bookmark, and the browser creates a new tab, but a project is already worked on in the same browser. It may happen that the new project has not been loaded correctly. The safest solution it to close the browser first.
• If angles are involved in a computation, then all quantities, which appear in angle notation , e.g. 16°10´19.63'', are converted to the standard notation, even though they are not angles. Be sure to give only angles in this angle notation here.
• Arithmetic expressions in Input areas are not workable in the angle unit DegMinSec.
• In the case of DegMinSec for longitude and latitude no canvas is displayed up to now.
• If pointnames can be interpreted as numbers with decimal point, e.g. 123.456 , and ''comma'' is chosen as an output decimal separator , the pointname is displayed as 123,456 . If this point also exists, a conflict is caused.
• If for both points are close to the equator or one point is near a pole, the computation may be inaccurate or even fail.
• If for the the Documentation of the computation procedure is invoked, then for points with individual solutions very close to each other, the solution number can sometimes not correctly displayed on the canvas. The numbers are sometimes plotted on top of each other.
• If a run yields multiple solutions then calling for the solutions currently not displayed is only possible immediately after the computation. If in the meantime the computation procedure has been analysed or the outlier detection has been invoked or the result table has been sorted, the buttons for calling these solutions disappear. A recomputation puts things right.
• sometimes finds mathematically equivalent computation procedures. The corresponding results coincide, but are treated as separate values. This may influence the computation of the median. See here:
• For and roundoff errors due to digit cancellation or divergence of iterations may occur. An error message or warning is displayed.
• For the computatition of characteristic polynomials of larger matrices may bei inexakt because the used method of Faddejew und Leverrier may be numerically unstable. The computatition of roots of such polynomials with is also critical and may yield inexact results or may even fail.

Did you know? Other software products also have weaknessed, may be even more of them or severe ones, but often keep quiet about them.