Learn about the data formats we accept in
Google's Complete Map Content Specifications.
In the case of polygons, multipolygons are preferred, rather than one feature with the same name each with geometry. If a feature is comprised of several polygons, use one multipolygon to represent them. For example, if you have a park that is in two sections, then include the park in one polygon. Please also note that Inner loops/donuts (for example to exclude lakes from a park, or an island from a water feature) are accepted, polygons should have correct windings (preferred order is clockwise for both internal and external polygons), and they must not self-intersect.
In the case of polylines, please provide clean geometry - i.e. no dangling lines, undershoots, overlapping lines, or nearly overlapping lines.