I have an area, which I divided into voronoi polygons using data points. I have no problem creating the polygons.
Now the data points are on a coordinate system, where every degree represents one meter. I know try to use the $area command to get the area, but the answer is way to large.
To clarify my problem I will try to give a bit of an example:
This image gives the spatial division of a set of data points, boreholes in this case. They all influence a certain area. This area is defined as their voronoi cell. I have created these cells:
What I now want to know is the area of the polygons. I have tried to use the command $area, but this gives an area which is way too big. I know this because I did some basic area calculations on some of the simpeler polygons. For example the area for the triangular polygon in the bottom left (BH1101) I calculated to be about 695,000 m2. However using the $area command give me an area of 8.6140950578267e+15 which is in no unit I know equal to what I calculated.
Why is this and how can I fix this?
The data comes from an excel sheet which I converted into a .txt file and put into Qgis. The location is somewhere in Germany, if need be I can get a more precise location, but it shouldnt matter for the results. I run Qgis on the standard settings, using the CRS (WGS84:4326).