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Generates a set of geopoints from a field. The first parameter must contain a single field. The field is interpolated for each position of the geopoints given as a second parameter. Where it is not possible to generate a sensible value due to lack of valid data in the fieldset, the internal geopoints missing value is used (this value can be checked for with the built-in variable geo_missing_value or removed with the function remove_missing_values ).
vector latitudes ( geopoints )
Extracts the latitudes of all the geopoints and returns them as a vector..
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Extracts the heights of all the geopoints and returns them as a vector.
vector longitudes ( geopoints )
Extracts the longitudes of all the geopoints and returns them as a vector.
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