from PyQt4.QtGui import QImage, QPainter
    from PyQt4.QtCore import QSize
    import os

    # raster layer in CRS UTM 33N (epsg 25833)
    rlayer = iface.activeLayer()
    # radius for image in meters
    radius = 50
    # center point
    p = [33401477,5826362]
    # bounding box
    bbox = QgsRectangle(p[0]-radius, p[1]-radius, p[0]+radius, p[1]+radius)
    # image
    img = QImage(QSize(200,200), QImage.Format_ARGB32_Premultiplied)
    ## create painter
    painter = QPainter()
    painter.begin(img)
    render = QgsMapRenderer()
    ## set layer set
    lst = [rlayer.id()]
    render.setLayerSet(lst)
    ## set extent
    render.setExtent(bbox)
    ## set output size
    render.setOutputSize(img.size(), img.logicalDpiX())
    ## do the rendering
    render.render(painter)
    painter.end()
    ## save image
    img.save("D:\Daten\QGIStmp\bbox1.png", "png")

u'<p class="glossy">Treiber</p>n<p>GDAL provider</p>nECW<br>ERDAS Compressed Wavelets (SDK 5.0)<p class="glossy">Datensatzbeschreibung</p>n<p>D:/Daten/QGIStmp/Nordost/dop20_400_5826.ecw</p>n<tr><p>nCOLORSPACE=RGB</p>n<p>nCOMPRESSION_RATE_TARGET=20</p>n<p>nVERSION=2</p>n</tr><p class="glossy">Kanal 1</p>n<p class="glossy">Kanal 2</p>n<p class="glossy">Kanal 3</p>n<p class="glossy">Dimensionen</p>n<p>X: 10000 Y: 10000 Kanxe4le: 3</p>n<p>X : 5000,Y 5000</p><p>X : 2500,Y 2500</p><p>X : 1250,Y 1250</p><p>X : 625,Y 625</p><p>X : 312,Y 312</p><p>X : 156,Y 156</p><p class="glossy">Ursprung</p>n<p>400000,5.828e+06</p>n<p class="glossy">Pixelgrxf6xdfe</p>n<p>0.2,-0.2</p>n<p class="glossy">Leerwert</p>n<p>*Leerwert nicht gesetzt*</p>n</p>n<p class="glossy">Datentyp</p>n<p>Byte - Acht Bit vorzeichenlose Ganzzahl</p>n<p class="glossy">Pyramidenxfcbersichten</p>n<p><p class="glossy">Rxe4umliches Bezugssystem des Layers</p>n<p>+proj=utm +zone=33 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs</p>n<p class="glossy">Layerausdehnung (in urspxfcnglicher Projektion des Layers)</p>n<p>400000.0000000000000000,5826000.0000000000000000 : 402000.0000000000000000,5828000.0000000000000000</p>n<p class="glossy">nKanal</p>n<p>Kanal 1</p>n<p>Kanal Nr</p>n<p>n1</p>n<p>Keine Statistik</p>n<p>nNoch keine Statistik gesammelt</p>n<p class="glossy">nKanal</p>n<p>Kanal 2</p>n<p>Kanal Nr</p>n<p>n2</p>n<p>Keine Statistik</p>n<p>nNoch keine Statistik gesammelt</p>n<p class="glossy">nKanal</p>n<p>Kanal 3</p>n<p>Kanal Nr</p>n<p>n3</p>n<p>Keine Statistik</p>n<p>nNoch keine Statistik gesammelt</p>n'

p = [318333,4993348]