[Tile-serving] [osm2pgsql] Add area reprojection facility (#454)

[Sarah Hoffmann]

> +        (*projectedHoles)[i] = reproject_linearring(hole);
> +    }
> +    const auto *projectedPoly = poly->getFactory()->createPolygon(projectedExt, projectedHoles);
> +
> +    auto area = projectedPoly->getArea();
> +    delete projectedPoly;
> +    return area;
> +}
> +
> +/**
> + * Reprojects given Linear Ring from target projection to spherical mercator.
> + * Caller takes ownership of return value.
> + */
> +geos::geom::LinearRing* geometry_builder::reproject_linearring(const geos::geom::LineString *ls) const
> +{
> +    std::vector<geos::geom::Coordinate> *projectedCoords = new std::vector<geos::geom::Coordinate>();

Dito, use unique_ptr.

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/454/files#r42942336
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