39a) A version that is based on rapid abstraction of space from the IKONOS satellite image and the aerial photographs: orange indicates major building complexes (often with large courtyards), yellow represents domestic housing and other smaller buildings (often with smaller courtyards), and green represents unbuilt space, such as gardens and orchards. The large orange area in the north-east is the citadel of Shahriyar Ark – although not all of this area was built-up. This version is quite detailed, with ideas of street pattern. In some senses this image is misleading, still needing much work to define street patterns and to more systematically tackle courtyard sizes and thus building complex definition. The area to the north-east of the large administrative complex in the centre, for example, probably had more substantial structures but the images are harder to interpret here because of modern roads.