A terrain elevation data generation method includes: obtaining, at an apparatus, a low-resolution data set corresponding to a geographic area and comprising a plurality of low-resolution terrain elevation values corresponding to first locations within the geographic area; and applying, at the apparatus, the plurality of low-resolution terrain elevation values to a resolution enhancing model to produce a plurality of higher-resolution terrain elevation values corresponding to second locations within the geographic area, a second quantity of the second locations within the geographic area being higher than a first quantity of the first locations within the geographic area.