drawBuildingsMatplotlib.py 文件源码

def drawBuildings(polygons, displayRatio=1.0):
    fig = plt.figure()
    ax = fig.add_subplot(111)   
    for feature in polygons['features']:
        if displayRatio < 1.0:
            if random.random() >= displayRatio:
                continue
        polygon = shape(feature['geometry'])
        patch = PolygonPatch(polygon, facecolor='#FD7400', edgecolor='#FD7400', alpha=0.5, zorder=1)
        ax.add_patch(patch)

    bounds = getBuildingsBoundaries(polygons)
    minx, miny, maxx, maxy = bounds
    ax.set_xlim(minx,maxx)
    ax.set_ylim(miny,maxy)

    plt.show()