GPS Meter of Area and Distance of Perimeter

Il ricevitore GPS registra il poligono in GeoJSON e ne misura l'area e il perimetro

The measurer is a lightweight version of "GPS recorder of polygon with area calculator" app, which is customized for operating in offline mode. This operating mode has a crucial meaning for countryside ( rural and desert areas ). Besides the less power consumption will alow to save a power.

The app consist from 2 parts:

• polygon GPS registrator

• area and perimeter calculator

The registrator takes a polygon vertices coordinates through the mobile GPS-receiver and if GPS signal deviation is not out of accuracy setup restriction then it registering a vertex. The next vertex is registering when the distance from the last fixed vertex also exceeding the user defined distance threshold i.e. step. For the polygon area measurement required at least 3 registered vertices. The app also measures the polygon perimeter. By the way you can switch on the GPS-receiver only when required to register the polygon vertex. The polygon GPS registrator is also operating in background mode.

For the measurements the calculator loopbacks the first and last vertices of polygon. Then calculates the area and perimeter. You can also to export and save the recorded polygon and its outline in GeoJSON file. This format you can easily visualize on map and customize by http://geojson.io online tool and edit or convert into other formats: KML, WKT, TopoJSON. By other online tools you can also merge multiple JSON files into one file.

★ Measured values

• Polygon parameters

- area in square meters (m²)

- area in hectares or acres (ha, ac)

- area in square feet (ft²)

- area in square miles (mi²)

- total number of vertices

• Perimeter line parameters

- summary distance in kilometers (km)

- total mileage (mi)

- total number of vertices