Get Global Reference Coordinates For Your Project

In order to place the Quuppa project into the global coordinate system, you will need both:
  • Accurate measurements of the physical space in which your Quuppa project will take place to scale the floor plan and enable accurate tracking results through the Quuppa system.
  • Reference points for your site in WGS-84 coordinates so that you can match the project to the global coordinate system and scale the reference image.

The best way to get accurate coordinates for your site is to check them from a detailed and official city plan. In city plans, the coordinates are typically given in some other format than WGS-84 (e.g. ETRS84, NAD84), but they can be converted into WGS-84 with readily available online tools. For example, the coordinate system used by the Finnish National Land Survey (ETRS-TM35FIN) can be converted into WGS-84 coordinates using this tool: http://www.loukko.net/koord_proj/.

If official city plans are not available, you can also get the reference coordinate points from other maps, e.g. Google Earth (https://earth.google.com/web/).

Note: Satellite images are often of a low resolution and the reference points may be difficult to identify. The lack of accuracy can have a detrimental effect on the positioning results generated by your Quuppa system later, and so we recommend using official plans that provide more accurate reference projects whenever possible.