The National Park Service frames its own map symbols (the icons already vendored in for POI categories) in a rounded square, not a pin — pairing a pin shape with NPS-style pictograms looked like two mismatched icon conventions. Switched the marker to a rounded square to match. This also simplifies the placement code: a pin has to anchor at its tip, so the category glyph on top needed an offset computed from the pin/glyph geometry to land in the pin's head. A square has no tip — both the badge and the glyph layer just center directly on the coordinate with no offset math at all.