RaindropViewer/Assets/Raindrop/Map/SpriteSizeManager.cs

using UnityEngine;

// to make the sprites in map scene scale to same "absolute size", regardless of zoom level
public class SpriteSizeManager : MonoBehaviour
{
    public SpriteRenderer sprite;
    public float targetHeight = 0.5f;

    // Start is called before the first frame update
    void Start()
    {
        sprite = this.GetComponent<SpriteRenderer>();
    }

    // Update is called once per frame
    void Update()
    {
        var bounds = sprite.sprite.bounds;
        var factor = targetHeight / bounds.size.y;
        transform.localScale = new Vector3(factor, factor, factor);
    }
}