Earthwork. Volume Measurement

The application Volume Measurement allows you to measure the area, volume of pile bounded by a maximum of 300 points connected by straight lines in real time. These points must be measured, taken from memory, or set via the keyboard. The measured area is projected onto an inclined reference plane defined by its points (3D). Volumes are automatically measured by calculating the digital terrain model (DTM) in the local coordinate system, where the first base point is taken as the origin. Triangulations of irregularly distributed points, known as Triangulated Irregular Networks (TIN) allow incorporation of terrain break lines (ridges, valleys), and extreme locations (e.g., summits) to better represent the terrain.

Handy feature:

positioning the receiver (phone screen) by the Sun for easy orientation on the terrain {1};
cylindrical coordinates (azimuth(θ), distance(r) to the previous point, difference in elevation between the points(z);
editing coordinates manually (and therefore recalculating) P, Lat,Lon, H ⇆ P X Y Z;
adding Contour Lines;
adding Direction Arrow with Slope Labels(Two-point);
removing duplicate points;
clipping points that go beyond the base surface;
calculating the area;
exporting points to excel (csv);
export of survey to SVG kml, SVGtoPNG.com +kml -viewing in google Earth {2}
Double tap SHIFTS CENTER OF ZOOM - double tap shifts the center of the zoom.

The latest stage of accuracy enhancement uses the L5 band and is now fully deployed. GPS receivers released in 2019 that use the L5 band can have much higher accuracy, pinpointing to within 30 centimeters or 11.8 inches.
{1} - even when GPS is disabled, the approximate location(1°) and time (~15min) are sufficient to rotate the upper, middle point of the screen, which points to the north(if the direction of the yellow asterik coincides with the Sun )

The second file (KML) is used to specify the location of the survey in Google Earth. (you can eat it in notepad.

Additional information:

0:00:00 - start measure the area, volume of pile
0:00:06 - To Swap Surface Triangle Edges
0:00:29 - positioning the receiver (phone screen) by the Sun for easy orientation on the terrain
0:00:47 - while surveying we remove/load the base points
0:01:21 - Edit (To Swap Surface Triangle Edges)
0:01:33 - Export points(Autocad; Excel)
0:01:42 - Import to autocad

It may be interesting to see my work.
review of the apps: