Can F2C work with wgs84 coordinates? about fields2cover HOT 5 CLOSED

Hi @groengpx, welcome to the project!!
Yes, Fields2Cover works on local coordinates. Fortunately, the library provides the class Transform to transform the coordinate system safely.

As an example:

F2CField field = ...; // Import your field
field.setEPSGCoordSystem(4326);  // WGS84 is EPSG:4326
f2c::Transform::transform(field, "EPSG:28992");  // Transform the field to a coordinate system that works in meters (28992 is from NL)
// ... Compute the path ...
 auto returned_path2 = f2c::Transform::transformPathWithFieldRef(path2, field, "EPSG:4326"); // Return the path to WGS84

Remember that this is an example to show the conversion between WGS84 to any EPSG coordinate system. If you were really working on NL, coordinate values should be recorded and saved on ETRS89 (EPSG:4258).

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Ah, thanks.

But then I need to know the local system of each country. Do you think I can get away with UTM zones? For example, when starting with a transformation, I check in which UTM zone the first coordinate is (let's say N31 (epsg:32631)) and then use that zone for the transformations (instead of epsg:28992 in your example).

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This should work f2c::Transform::transform(field, "UTM:31N datum:WGS84"), but I haven't tested in depth

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@groengpx Did it solved your problem? :)

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Haven't got time yet, but it seems to be a good solution. I will close this for now. If it won't work, I will reopen.

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