Agenda:
Bottom of the picture is the border gate and to the right of that a little footbridge used by Cambodians to cross the river.
The diamond above the check point is the coach station.
The yellow buildings are the indoor markets.
Further up is the white buildings that are the open fronted shops. To their right are the fresh produce under the striped canopies.
Various Blue buildings and more white ones house all manner of small stalls selling just about everything you can think of.
You can see the stalls that are stretched out as far as possible to maximise the displays and then at the top are the red roofs of distribution and storage units.