The EasyNET software is developed for user-friendly processing of accurate geodetic measurements. It is focused on automatic processing of variables measured by total stations, level instruments and gyro-theodolites. These measurements are automatically adjusted by the method of least squares. The result of this process is an adjusted spatial geodetic network. Originality and uniqueness of the software is based on application of advanced computing methods, which provide an exact evaluation of measurements and the best results. The software is designed for MS Windows in Czech and English language versions.

The most significant advantage of the present software is an method for automatic detection and rejection of outlying measurements. This method, which was designed and thoroughly tested by authors of the EasyNET software, is based on a robust adjustment of geodetic measurement.

The software combines all data (measurements and user settings) into a file (the project), allowing easy data transfer and collaboration between different users. In addition to many result spreadsheets, there is a graphical output showing adjusted geodetic network with error ellipses (Fig. 13) and a text protocol of a network adjustment (Fig. 14). The graphical output is possible to export to bitmap format or AutoCAD drawing exchange format (DXF).

## Software features

Basic features of the EasyNET software are briefly described in the following paragraphs:

1. Detection of measurement sets

2. Measurement checking

3. Inclusion of supplementary measurement

4. Measurement reduction

5. Robust calculation of approximate coordinates of network points

6. Detection of gross errors

7. A priori accuracy analysis of geodetic network

The internal accuracy method determines sample standard deviations. The samples include random values of variables repeatedly measured by a total station at individual standpoints (multiple measurement sets, Fig. 6). These standard deviations describe only random measurement errors.

The external accuracy method has two parts. The first is based on an adjustment of slope distances and zenith angles, which are measured between each two points of the geodetic network (values measured in opposite directions, Fig. 7). The second uses the adjustment of horizontal directions, which are measured among each trio of network points (angular misclosures, Fig. 8). These standard deviations describe both random and systematic measurement errors.

8. Detection of outliers

9. Adjustment of spatial geodetic network (by the method of least squares)

Depending on the number of fixed network points and supplementary measurement, the software provides the network adjustment in the following variants:

- free geodetic network (free adjustment)
- with inner constraints for translation and rotation of network

- partly fixed geodetic network (minimally constrained adjustment)
- with a fixed point and inner constraints for network rotation
- with a fixed bearing and inner constraints for network translation

- fixed geodetic network (fully constrained adjustment)
- with two or more fixed points
- with a fixed point and fixed bearing

10. Transformation of adjusted network

## Documentation

Software documentation is published only in Czech language.

EasyNET documentation (in Czech)

## Download

EasyNET Demo is provided only for scientific and educational purposes, i.e. it cannot be used for commercial purposes. This demo version processes no more than 200 measurement values and 7 network points.

Demo version (including demonstration data) download links below: