タイルマップで地域スコアをコンパクト表示

import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle

regions = {
    "北海道": (0, 3, 68),
    "東北": (1, 2, 58),
    "関東": (2, 2, 82),
    "中部": (2, 1, 74),
    "近畿": (3, 1, 79),
    "中国": (3, 0, 63),
    "四国": (4, 0, 55),
    "九州": (4, -1, 60),
    "沖縄": (5, -1, 52),
}

fig, ax = plt.subplots(figsize=(6, 4))
for name, (x, y, score) in regions.items():
    color = plt.cm.Blues((score - 50) / 35)
    tile = Rectangle((x, y), 1, 1, facecolor=color, edgecolor="white", linewidth=1.5)
    ax.add_patch(tile)
    ax.text(
        x + 0.5,
        y + 0.5,
        f"{name}\n{score}",
        ha="center",
        va="center",
        color="white" if score > 70 else "#0f172a",
        fontsize=9,
    )

ax.set_xlim(-0.2, 6.2)
ax.set_ylim(-1.5, 4)
ax.set_xticks([])
ax.set_yticks([])
ax.set_title("地域別満足度スコアのタイルマップ")
ax.set_aspect("equal")
ax.set_frame_on(False)

sm = plt.cm.ScalarMappable(cmap="Blues", norm=plt.Normalize(50, 85))
sm.set_array([])
cbar = fig.colorbar(sm, ax=ax, fraction=0.045, pad=0.02)
cbar.set_label("スコア")

fig.tight_layout()
fig.savefig("static/images/visualize/advanced/tilemap-grid.svg")