TopoTool

This app allows you to survey land-surfaces and create digital raster models

This application allows you to survey land-surfaces with your android device. This data will be converted into a digital raster model which is useful for land analysis/simulation/design. Those raster models can be exported and for example, used in QGIS

supported inputs:

- internal GPS

- Bluetooth GNSS (RTK) receiver (NMEA)

- USB-Serial GNSS (RTK) receiver (NMEA)

- CSV files (EPSG:4326) with latitude, longitude, and elevation

- GPX file

supported outputs:

- GPX file

- Ascii Grid (EPSG:3857, EPSG:4326, UTM)

- Image (.png) and world file (.pgw)